[MBZ] A/C question
Has anyone experienced a noisy XP valve? Ever since I replaced the compressor, drier and XP valve there is an intermittent noise coming from under the dash when the A/C is on.Sounds like a high note on a saxophone. It is not the blower. Sometimes when I shut the car off it whistles for nearly a minute til it fades out. -- Hans Neureiter, Katy, TX '82 300SD '01 VW New Beetle 1.9L TDI ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
Only problem with that is you need closer to 30" to get any moisture out of the system. ---Robert Trampas wrote: > A proper running car will pull to about 19" at idle which on the hot days of > summer around here it is pretty good. > > Trampas > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Rich Thomas > Sent: Wednesday, August 22, 2007 3:19 PM > To: Mercedes Discussion List > Subject: Re: [MBZ] A/C Question > > Engine vacuum only pulls down to like half atmospheric (13-14" maybe), > not really enough to do any good in an AC system. > > --R > > Trampas wrote: > >> I changed one on my 300SD and it was relatively easy, on the 420SEL there >> was an extra brace and it took half the day. If I had to do it again I >> > would > >> remove the dash pad first. >> >> Also to vacuum out the system I have used a vacuum line from the engine. >> That is start engine connect AC gauge to intake manifold through vacuum >> > line > >> and let engine run (assuming gas engine). However I now have a cheap >> > vacuum > >> pump powered from air compressor that I got from harbor freight for under >> $20. >> >> Trampas >> >> >> -Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >> On Behalf Of Jim Cathey >> Sent: Tuesday, August 21, 2007 11:49 PM >> To: Mercedes Discussion List >> Subject: Re: [MBZ] A/C Question >> >> >> >>> Depends on which car. The expansion valve on the 124 is between the >>> firewall behind and inboard of the brake booster. On the 126 I expect >>> it's still behind and above the brake pedal (and an absolute BEAST to >>> work on). >>> >>> >> For the 126 lie on your back with your head next to the gas >> pedal. Look up. You can see it. Just. I have no idea how >> one would actually get a wrench on it, much less two of them >> to crack the fittings loose. BEAST is an understatement. >> >> -- Jim >> >> >> ___ >> http://www.okiebenz.com >> For new parts see official list sponsor: http://www.buymbparts.com/ >> For used parts email [EMAIL PROTECTED] >> >> To Unsubscribe or change delivery options go to: >> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> >> ___ >> http://www.okiebenz.com >> For new parts see official list sponsor: http://www.buymbparts.com/ >> For used parts email [EMAIL PROTECTED] >> >> To Unsubscribe or change delivery options go to: >> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> >> >> >> > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
A proper running car will pull to about 19" at idle which on the hot days of summer around here it is pretty good. Trampas -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rich Thomas Sent: Wednesday, August 22, 2007 3:19 PM To: Mercedes Discussion List Subject: Re: [MBZ] A/C Question Engine vacuum only pulls down to like half atmospheric (13-14" maybe), not really enough to do any good in an AC system. --R Trampas wrote: > I changed one on my 300SD and it was relatively easy, on the 420SEL there > was an extra brace and it took half the day. If I had to do it again I would > remove the dash pad first. > > Also to vacuum out the system I have used a vacuum line from the engine. > That is start engine connect AC gauge to intake manifold through vacuum line > and let engine run (assuming gas engine). However I now have a cheap vacuum > pump powered from air compressor that I got from harbor freight for under > $20. > > Trampas > > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Jim Cathey > Sent: Tuesday, August 21, 2007 11:49 PM > To: Mercedes Discussion List > Subject: Re: [MBZ] A/C Question > > >> Depends on which car. The expansion valve on the 124 is between the >> firewall behind and inboard of the brake booster. On the 126 I expect >> it's still behind and above the brake pedal (and an absolute BEAST to >> work on). >> > > For the 126 lie on your back with your head next to the gas > pedal. Look up. You can see it. Just. I have no idea how > one would actually get a wrench on it, much less two of them > to crack the fittings loose. BEAST is an understatement. > > -- Jim > > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
Engine vacuum only pulls down to like half atmospheric (13-14" maybe), not really enough to do any good in an AC system. --R Trampas wrote: > I changed one on my 300SD and it was relatively easy, on the 420SEL there > was an extra brace and it took half the day. If I had to do it again I would > remove the dash pad first. > > Also to vacuum out the system I have used a vacuum line from the engine. > That is start engine connect AC gauge to intake manifold through vacuum line > and let engine run (assuming gas engine). However I now have a cheap vacuum > pump powered from air compressor that I got from harbor freight for under > $20. > > Trampas > > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Jim Cathey > Sent: Tuesday, August 21, 2007 11:49 PM > To: Mercedes Discussion List > Subject: Re: [MBZ] A/C Question > > >> Depends on which car. The expansion valve on the 124 is between the >> firewall behind and inboard of the brake booster. On the 126 I expect >> it's still behind and above the brake pedal (and an absolute BEAST to >> work on). >> > > For the 126 lie on your back with your head next to the gas > pedal. Look up. You can see it. Just. I have no idea how > one would actually get a wrench on it, much less two of them > to crack the fittings loose. BEAST is an understatement. > > -- Jim > > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
I changed one on my 300SD and it was relatively easy, on the 420SEL there was an extra brace and it took half the day. If I had to do it again I would remove the dash pad first. Also to vacuum out the system I have used a vacuum line from the engine. That is start engine connect AC gauge to intake manifold through vacuum line and let engine run (assuming gas engine). However I now have a cheap vacuum pump powered from air compressor that I got from harbor freight for under $20. Trampas -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Cathey Sent: Tuesday, August 21, 2007 11:49 PM To: Mercedes Discussion List Subject: Re: [MBZ] A/C Question > Depends on which car. The expansion valve on the 124 is between the > firewall behind and inboard of the brake booster. On the 126 I expect > it's still behind and above the brake pedal (and an absolute BEAST to > work on). For the 126 lie on your back with your head next to the gas pedal. Look up. You can see it. Just. I have no idea how one would actually get a wrench on it, much less two of them to crack the fittings loose. BEAST is an understatement. -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
> Depends on which car. The expansion valve on the 124 is between the > firewall behind and inboard of the brake booster. On the 126 I expect > it's still behind and above the brake pedal (and an absolute BEAST to > work on). For the 126 lie on your back with your head next to the gas pedal. Look up. You can see it. Just. I have no idea how one would actually get a wrench on it, much less two of them to crack the fittings loose. BEAST is an understatement. -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
As I recall, it's behind the glove box on a 123. Not really all that bad to access. Scott Ritchey -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Craig McCluskey Sent: Tuesday, August 21, 2007 10:47 PM To: Mercedes Discussion List Subject: Re: [MBZ] A/C Question On Tue, 21 Aug 2007 14:45:57 -0400 Marshall Booth <[EMAIL PROTECTED]> wrote: > dave walton wrote: > > Where is the expansion valve located? > > > > -Dave Walton > > Depends on which car. The expansion valve on the 124 is between the > firewall behind and inboard of the brake booster. On the 126 I expect > it's still behind and above the brake pedal (and an absolute BEAST to > work on). How about a 123? Craig ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
A 123 is easy. It's the filling in a foam sandwich accessible either thru the glove box or if not there for sure behind the lower panel below the box. Reminds me, the insulating sandwich is kaput on my '80; I need to order a replacement if I'm ever to get around to recharging the thing. -joe ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
On Tue, 21 Aug 2007 14:45:57 -0400 Marshall Booth <[EMAIL PROTECTED]> wrote: > dave walton wrote: > > Where is the expansion valve located? > > > > -Dave Walton > > Depends on which car. The expansion valve on the 124 is between the > firewall behind and inboard of the brake booster. On the 126 I expect > it's still behind and above the brake pedal (and an absolute BEAST to > work on). How about a 123? Craig ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
Someone was looking a AC Gauge/Hose set for R134a - there's one - no doubt made in china -- priced at $40 in the latest Harborfreight catalog. Let me know if you have more questions or need more info - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil PORSCHE POSTERS! youroil.net Weber Carb Info http://members.rennlist.com/webercarbs . - Original Message - From: "Tom Hargrave" <[EMAIL PROTECTED]> To: "'Mercedes Discussion List'" Sent: Monday, August 20, 2007 9:50 PM Subject: Re: [MBZ] A/C Question > Blowing a can through will not purge any moisture. > > Thanks, > Tom Hargrave > www.kegkits.com > 256-656-1924 > > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Jim Cathey > Sent: Monday, August 20, 2007 8:47 PM > To: Mercedes Discussion List > Subject: Re: [MBZ] A/C Question > >> Plan on changing a couple of O-rings in the A/C lines. After changing >> the o-rings and secure the fittings, what is the next step to recharge >> the system? TIA > > Vacuum, then recharge. The old-school way to recharge without > a vacuum pump was to blow a can or so of refrigerant through the > system, scavenging any air with it. You DO NOT want any air > left in there. It ruins the performance, and can be downright > hazardous depending on the refrigerant and/or oil. > > -- Jim > > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.484 / Virus Database: 269.12.1/963 - Release Date: 8/20/2007 > 5:44 PM > > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
dave walton wrote: > Where is the expansion valve located? > > -Dave Walton Depends on which car. The expansion valve on the 124 is between the firewall behind and inboard of the brake booster. On the 126 I expect it's still behind and above the brake pedal (and an absolute BEAST to work on). Marshall -- Marshall Booth Ph.D. Ass't Prof. (ret.) Univ of Pittsburgh School of Medicine [EMAIL PROTECTED] ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
Where is the expansion valve located? -Dave Walton On 8/20/07, Bill Gallagher <[EMAIL PROTECTED]> wrote: > Plan on changing a couple of O-rings in the A/C lines. After changing > the o-rings and secure the fittings, what is the next step to recharge > the system? TIA > > Bill > 1981 300 TD > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
Blowing a can through will not purge any moisture. Thanks, Tom Hargrave www.kegkits.com 256-656-1924 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Cathey Sent: Monday, August 20, 2007 8:47 PM To: Mercedes Discussion List Subject: Re: [MBZ] A/C Question > Plan on changing a couple of O-rings in the A/C lines. After changing > the o-rings and secure the fittings, what is the next step to recharge > the system? TIA Vacuum, then recharge. The old-school way to recharge without a vacuum pump was to blow a can or so of refrigerant through the system, scavenging any air with it. You DO NOT want any air left in there. It ruins the performance, and can be downright hazardous depending on the refrigerant and/or oil. -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
pull a vacuum Bill Gallagher wrote: > Plan on changing a couple of O-rings in the A/C lines. After changing > the o-rings and secure the fittings, what is the next step to recharge > the system? TIA > > Bill > 1981 300 TD > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > -- Kaleb C. Striplin/Claremore, OK 94 E420, 92 300D, 92 250D Turbo, 92 300E 4Matic, 91 300D, 90 420SEL, 89 560SEL, 89 260E, 87 300SDL, 87 300TD, 85 380SE 5.0 Euro, 81 240D, 81 380SLC, 80 240D, 76 240D, 76 300D, 72 250C, 69 250 http://www.okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
> Plan on changing a couple of O-rings in the A/C lines. After changing > the o-rings and secure the fittings, what is the next step to recharge > the system? TIA Vacuum, then recharge. The old-school way to recharge without a vacuum pump was to blow a can or so of refrigerant through the system, scavenging any air with it. You DO NOT want any air left in there. It ruins the performance, and can be downright hazardous depending on the refrigerant and/or oil. -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C Question
Assuming you are going to re-install the same type of refrigerant that was in the system, you need to pull a vacuum & hold that vacuum for at least an hour. Then you can charge the system. Tom www.kegkits.com Original Message From: Bill Gallagher <[EMAIL PROTECTED]> Sent: 08/20/07 07:51 PM To: Mercedes Discussion List Subject: [MBZ] A/C Question -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Plan on changing a couple of O-rings in the A/C lines. After changing the o-rings and secure the fittings, what is the next step to recharge the system? TIA Bill 1981 300 TD ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] A/C Question
Plan on changing a couple of O-rings in the A/C lines. After changing the o-rings and secure the fittings, what is the next step to recharge the system? TIA Bill 1981 300 TD ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C question
Thanks Mitch - I use that switch often ;-) but I think I'll pass on modifying the downshift switch to do anything more thn it already does. ;-) Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: "Mitch Haley" <[EMAIL PROTECTED]> To: "Mercedes Discussion List" Sent: Saturday, July 29, 2006 10:14 AM Subject: Re: [MBZ] A/C question LarryT wrote: Where might that switch be located? On the old cars (123/116 at least) it's under the go pedal. (it's the tranny kickdown switch) A little extra wiring and it can double as the A/C cutout switch. Some wags have mentioned that it's pointless to use a throttle cutout on a 240D, because it would prevent the A/C from ever operating ;-) ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.10.5/403 - Release Date: 7/28/2006
Re: [MBZ] A/C question
Ah! I love good news. Thanks guys. Now It's off to get some touch-up paint. There's a shop real near my house that brings a camera or scanner of some sort out to the car and reads your paint, then mixes some up. It worked well enough for my Saab, so I'm gonna try it for this one. Brian 83 240D On 7/29/06, LarryT <[EMAIL PROTECTED]> wrote: Hello Brian, Your AC compressor will not run with out any (or low) Freon in it. There's a low pressure switch that detects the low pressure situation and prevents it coming on. As far as gaining those elusive 500 hp in your 240D, the AC compressor is free-wheeling and without the compressor locking in the hp loss would be extremely small - I doubt you;d notice any difference at all. As an owner of a sub-sonic 240D I am experienced at turning the fan or AC to off when starting from a dead stop - or when I (Gasp!) might attempt to pass someone - obviously they'd have to be going *very* slow, going downhill and having zero traffic in the distance. It doesn't happen often. ;-) Good luck - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: "Zoltan Finks" <[EMAIL PROTECTED]> To: "Mercedes Discussion List" Sent: Saturday, July 29, 2006 1:56 AM Subject: [MBZ] A/C question > The A/C on my 83 240D has no freon in it. Haven't checked yet whether it > has > a big leak or whether it was allowed to discharge over a long period of > time > by the PO. > > Question is: Does running the thing without any freon in the system harm > the > compressor? > > Also: How much benefit do y'all think I'd get from removing the A/C belt > (in > terms of fuel mileage and power)? Yes, I mentioned the terms 240D and > power > in the same email. Restrain yourselves. > > Brian > 83 240D > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.394 / Virus Database: 268.10.4/402 - Release Date: 7/27/2006 > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] A/C question
LarryT wrote: > > Where might that switch be located? > On the old cars (123/116 at least) it's under the go pedal. (it's the tranny kickdown switch) A little extra wiring and it can double as the A/C cutout switch. Some wags have mentioned that it's pointless to use a throttle cutout on a 240D, because it would prevent the A/C from ever operating ;-)
Re: [MBZ] A/C question
Where might that switch be located? Sounds like a good thing to have. ;-) WOT - Look Out - 240D coming thru - here I come! Yeee Haw! Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: "Jim Cathey" <[EMAIL PROTECTED]> To: "Mercedes Discussion List" Sent: Saturday, July 29, 2006 9:09 AM Subject: Re: [MBZ] A/C question As an owner of a sub-sonic 240D I am experienced at turning the fan or AC to off when starting from a dead stop - or when I (Gasp!) might attempt to pass someone - obviously they'd have to be going *very* slow, going downhill and having zero traffic in the distance. It doesn't happen often. ;-) Some cars have a WOT switch that cuts out the compressor. You could modify yours to do the same, if it's not there already. The switch is already in place. -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.10.4/402 - Release Date: 7/27/2006
Re: [MBZ] A/C question
Question is: Does running the thing without any freon in the system harm the compressor? It would, except there's a pressure safety switch to prevent this. A York compressor will tolerate it just fine, early systems using that compressor don't have the switch. York compressors make fine on-board air compressors, because they have an oil-filled crankcase. Also: How much benefit do y'all think I'd get from removing the A/C belt (in terms of fuel mileage and power)? Negligible. You could probably double the effect by entirely removing the thing so as to save carrying the extra weight around. Model this by carrying a sandbag in the trunk to see how much your mileage and acceleration suffers. -- Jim
Re: [MBZ] A/C question
As an owner of a sub-sonic 240D I am experienced at turning the fan or AC to off when starting from a dead stop - or when I (Gasp!) might attempt to pass someone - obviously they'd have to be going *very* slow, going downhill and having zero traffic in the distance. It doesn't happen often. ;-) Some cars have a WOT switch that cuts out the compressor. You could modify yours to do the same, if it's not there already. The switch is already in place. -- Jim
Re: [MBZ] A/C question
Hello Brian, Your AC compressor will not run with out any (or low) Freon in it. There's a low pressure switch that detects the low pressure situation and prevents it coming on. As far as gaining those elusive 500 hp in your 240D, the AC compressor is free-wheeling and without the compressor locking in the hp loss would be extremely small - I doubt you;d notice any difference at all. As an owner of a sub-sonic 240D I am experienced at turning the fan or AC to off when starting from a dead stop - or when I (Gasp!) might attempt to pass someone - obviously they'd have to be going *very* slow, going downhill and having zero traffic in the distance. It doesn't happen often. ;-) Good luck - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: "Zoltan Finks" <[EMAIL PROTECTED]> To: "Mercedes Discussion List" Sent: Saturday, July 29, 2006 1:56 AM Subject: [MBZ] A/C question The A/C on my 83 240D has no freon in it. Haven't checked yet whether it has a big leak or whether it was allowed to discharge over a long period of time by the PO. Question is: Does running the thing without any freon in the system harm the compressor? Also: How much benefit do y'all think I'd get from removing the A/C belt (in terms of fuel mileage and power)? Yes, I mentioned the terms 240D and power in the same email. Restrain yourselves. Brian 83 240D ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.10.4/402 - Release Date: 7/27/2006
[MBZ] A/C question
The A/C on my 83 240D has no freon in it. Haven't checked yet whether it has a big leak or whether it was allowed to discharge over a long period of time by the PO. Question is: Does running the thing without any freon in the system harm the compressor? Also: How much benefit do y'all think I'd get from removing the A/C belt (in terms of fuel mileage and power)? Yes, I mentioned the terms 240D and power in the same email. Restrain yourselves. Brian 83 240D
