[MBZ] '84 300d problems....
hello, my name is trey. i'm from ardmore, oklahoma and just happened to come across your website while looking around on eBay for some parts to my mercedes. i bought my '84 300d from a guy in edmond about 6 months ago and have been somewhat pleased with it since then. the only thing that has me unhappy is what i'm assuming is a vacuum problem. about 2 months ago i noticed that my car wouldn't die when i turned the key off. so i began popping the hood and just killing it like that. well over time this got more and more annoying so i ended up ordering a vacuum pump from the guy that i'd purchased the car from and had my dad help me to install it. this seemed to help somewhat for a little while. however, within the past month i've noticed that the problem is back. along with not dying when i turn the key off, i've also noticed that the locks are hesitant to lock and unlock when the key is turned in the door, the air conditioner / heater tends to go from blowing really hard to hardly at all and that braking has become very hard to do. but the only thing is, sometimes these problems exist and other times they don't. so i didn't know if there is possible a vacuum line leak or what? anyway, if you have any suggestions or advice, i would greatly appreciate it. thank you, trey ___ 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] '84 300d problems....
The brake circuit *SHOULD* be protected from vacuum leaks in the non essential circuits like the locks, climate control, engine stop, etc. I'd check for vacuum at the pump and work my way down to the brake booster. It is possible that a cracked brake booster could cause the whole mess, but you'd want to be very sure about that diagnosis before going to the expense and bother of replacing it. (OTOH, the vac pump was probably a great deal of expense and bother too) Mitch. ___ 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] '84 300d problems....
> know if there is possible a vacuum line leak or what? You have an intermittent (and getting worse) vacuum leak. Classic. If you do not have a MityVac (or equivalent), you need to get one, then start dividing and conquering the various vacuum systems. Start with the locks. As a test, remove the yellow hose from the vacuum supply cluster under the hood and put a golf tee in the rubber to cork it off. Then get back to us. -- 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] '84 300d problems....
> ...remove the yellow hose... I suppose I should mention that this will take the vacuum door lock system down! It's usually the first culprit to check, well before you replace a vacuum pump. -- 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] 84 300D problems
Trey: I had the exact same problem. My mechanic found that the vac pump wasn't pulling enough vac and that there was a crack in the brake booster. Replaced the vac pump and some related vac lines, fittings, and check valve, and epoxied the brake booster. It is possible for brakes, heating valves, and shutoff to be affected by the same cause; mine were. I'd check the vac pump for pulling spec first, then work back from there. Done professionally, it wasn't a cheap fix, but works better than ever now. Good luck! Dan 82 300SD, 300k On Jan 26, 2008, at 9:56 PM, [EMAIL PROTECTED] wrote: > hello, my name is trey. i'm from ardmore, oklahoma and just > happened to > come across your website while looking around on eBay for some > parts to > my mercedes. i bought my '84 300d from a guy in edmond about 6 months > ago and have been somewhat pleased with it since then. the only thing > that has me unhappy is what i'm assuming is a vacuum problem. about 2 > months ago i noticed that my car wouldn't die when i turned the key > off. > so i began popping the hood and just killing it like that. well over > time this got more and more annoying so i ended up ordering a vacuum > pump from the guy that i'd purchased the car from and had my dad > help me > to install it. this seemed to help somewhat for a little while. > however, > within the past month i've noticed that the problem is back. along > with > not dying when i turn the key off, i've also noticed that the locks > are > hesitant to lock and unlock when the key is turned in the door, the > air > conditioner / heater tends to go from blowing really hard to hardly at > all and that braking has become very hard to do. but the only thing > is, > sometimes these problems exist and other times they don't. so i didn't > know if there is possible a vacuum line leak or what? anyway, if you > have any suggestions or advice, i would greatly appreciate it. > > thank you, > trey ___ 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] '84 300d problems....
More likely the plastic part in the main vac line from the pump to the booster is bad, or the booster is blown. Check the main line for cracks there, and replace if at all iffy. You will need a mitivac or similar hand pump to check the booster -- it must hold vac indefinitely, if not replace. Expect to replace all the small rubber connectors in the vacuum system that are exposed to heat and light, the rubber goes bad (rock hard in some cases, turns to mush in others) -- this will restore things like locks and shutoff solenoids. Peter ___ 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
