Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Rick Knoble]

On May 21, 2013, at 11:15 AM, "Randy Bennell"  wrote:

> Try putting a test gauge on and see if there is actually pressure there.


Will try that when I get another day off. 

Rick
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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Randy Bennell]

On 17/05/2013 7:32 PM, Rick Knoble wrote:

On May 12, 2013, at 8:25 PM, "Max"  wrote:


Try replacing the oil pressure sensor first.  They are electronic and do go bad.


I changed the sender out today. No change. Will do the o-rings tomorrow. I hope 
I haven't done any damage by running it with low oil pressure.

Rick
Sent from my iPhone

___


Try putting a test gauge on and see if there is actually pressure there.
Could still be in the wiring of the gauge itself?
You can get mechanic's tools that are intended for the purpose or make 
your own from a mechanical oil pressure gauge.

My son the mechanic has a snap on oil gauge.
I have a mechanical pressure gauge and a small diameter hydraulic hose 
that I have used on occasion.


Randy

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Brian Toscano]

if oil pressure is low at idle take the oil filler cap off and see how much
blow by you have.



On Fri, May 17, 2013 at 10:12 PM, Chris James  wrote:

> OM60x Min specs I believe are: 0.3 bar at idle and at least 3 bar at
> 3000 rpm. Not sure what a 2.5 runs @ 60. 2200 RPM? So as long as it's
> pegged by 80 your OK! :-)
>
>
> Seriously though, from browsing the archive I'd replace both
> the o-rings & oil filter to rule out any sealing/gasket issues. IF that
> doesn't change anything you need to explore furtherbad relief valves
> (filter and/or pump), worn oil pump, pickup screen blockages ect
>
> Good luck!
>
>
> On 5/17/2013 8:32 PM, Rick Knoble wrote:
>
>> I changed the sender out today. No change. Will do the o-rings
>> tomorrow. I hope I haven't done any damage by running it with low
>> oil pressure.
>>
>> Rick
>>
>
> --
> Chris J.
>
>
> __**_
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> http://www.okiebenz.com/**archive/
>
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> http://mail.okiebenz.com/**mailman/listinfo/mercedes_**okiebenz.com
>
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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Chris James]

OM60x Min specs I believe are: 0.3 bar at idle and at least 3 bar at
3000 rpm. Not sure what a 2.5 runs @ 60. 2200 RPM? So as long as it's
pegged by 80 your OK! :-)


Seriously though, from browsing the archive I'd replace both
the o-rings & oil filter to rule out any sealing/gasket issues. IF that
doesn't change anything you need to explore furtherbad relief valves
(filter and/or pump), worn oil pump, pickup screen blockages ect

Good luck!

On 5/17/2013 8:32 PM, Rick Knoble wrote:

I changed the sender out today. No change. Will do the o-rings
tomorrow. I hope I haven't done any damage by running it with low
oil pressure.

Rick


--
Chris J.

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Peter Frederick]

Should be about the same -- the reason you normally see 2 bar is that  
the cooling spray jets that spray oil onto the bottom of the pistons  
open at 2 bar.  Unless you have a really worn engine or a dying oil  
pump,  there is enough flow to open the jets at idle.


Peter

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Craig]

On Fri, 17 May 2013 22:09:35 -0500 Peter Frederick 
wrote:

> On the turbos, minimum 0.5 bar at idle hot, must peg the gauge at 1500  
> rpm.
> 
> Typically you won't see less than 2 bar at idle unless you are stuck  
> in a traffic jam on a hot summer day with the AC on.

Is that for W124 turbos, as well as W123 turbos?


Craig

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Peter Frederick]

On the turbos, minimum 0.5 bar at idle hot, must peg the gauge at 1500  
rpm.


Typically you won't see less than 2 bar at idle unless you are stuck  
in a traffic jam on a hot summer day with the AC on.


Peter

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Craig]

On Fri, 17 May 2013 19:32:31 -0500 Rick Knoble 
wrote:

> On May 12, 2013, at 8:25 PM, "Max"  wrote:
> 
> > Try replacing the oil pressure sensor first.  They are electronic and
> > do go bad.
> 
> I changed the sender out today. No change. Will do the o-rings
> tomorrow. I hope I haven't done any damage by running it with low oil
> pressure. 
> 

What is the spec for oil pressure on the 2.5 turbodiesel? For OM61x
engines, the spec is greater than 0.5 bar and pegged when the throttle is
pressed.


Craig

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Rick Knoble]

On May 12, 2013, at 8:25 PM, "Max"  wrote:

> Try replacing the oil pressure sensor first.  They are electronic and do go 
> bad.


I changed the sender out today. No change. Will do the o-rings tomorrow. I hope 
I haven't done any damage by running it with low oil pressure. 

Rick
Sent from my iPhone

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Trent Fiorini]

I can have you a sensor by tues. Wed at the latest. if you let me know
tomorrow.

On Sun, May 12, 2013 at 8:47 PM, Dieselhead <126die...@gmail.com> wrote:

>  Try replacing the oil pressure sensor first.  They are electronic and do
>> go bad.  I thought my '87 wagon had abnormally low pressure at hot idle,
>> and so replaced the sensor and then it read 1.5 bar or higher.
>> --
>> Max Dillon
>> Charleston, SC
>> '95 E300, '87 300TD, '73 Balboa 20
>>
>> __
>>
>
> Since its time for an oil change, I might try changing oil  and filter
> first.  I keep those on hand, while it would take a week to get a sensor
> from Q.
>
> What brand of filter do you use?  If it is Mann, Knecht or similar, there
> should be no problem.  Even a Wix in nowhere near as good as a german one.
>  With 'merkun engines, Wix is the best generally.  More likely to have a
> filter failure with a 'merkun brand filter.
>
>
> __**_
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-- 
Trent Fiorini
BuyMBparts, Inc.
1-800-741-5252
buymbpa...@gmail.com
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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Dieselhead]

Try replacing the oil pressure sensor first.  They are electronic 
and do go bad.  I thought my '87 wagon had abnormally low pressure 
at hot idle, and so replaced the sensor and then it read 1.5 bar or 
higher.

--
Max Dillon
Charleston, SC
'95 E300, '87 300TD, '73 Balboa 20

__


Since its time for an oil change, I might try changing oil  and 
filter first.  I keep those on hand, while it would take a week to 
get a sensor from Q.


What brand of filter do you use?  If it is Mann, Knecht or similar, 
there should be no problem.  Even a Wix in nowhere near as good as a 
german one.  With 'merkun engines, Wix is the best generally.  More 
likely to have a filter failure with a 'merkun brand filter.


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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Max]

Try replacing the oil pressure sensor first.  They are electronic and do go 
bad.  I thought my '87 wagon had abnormally low pressure at hot idle, and so 
replaced the sensor and then it read 1.5 bar or higher.
-- 
Max Dillon
Charleston, SC
'95 E300, '87 300TD, '73 Balboa 20

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Peter Frederick]

Verify that the pressure is indeed low and you don't just have a bad  
pressure sender unit!


Mine did something similar, then dropped to zero and sat there.   
Replaced the sender, works fine.


It is also possible to dislodge an internal seal in the oil filter,  
which will drop the oil pressure quite a bit.


Peter

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Dieselhead]

Bad ground?  Tach is inop.  What year?  Does it have a self 
destructing wiring harness?  These have not been prevalent on 
Diesels, but still possible as the cars age.  I seemed to get the 
things that Herr Doktor said were impossible.




That could be possible too

Sent from my iPhone

On May 12, 2013, at 7:12 PM, Rick Knoble  wrote:


 On May 12, 2013, at 6:09 PM, "Rick Knoble"  wrote:


 3. Failed oil pump.



 4. Failed oil sender?

 Rick

 > Sent from my iPhone
 >


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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[WILTON]

Oil pressure problem on my 81 300D years ago was cogged pickup screen (bits 
of vac pump from several years before).


Wilton

- Original Message - 
From: "Rick Knoble" 

To: "Mercedes Discussion List" 
Sent: Sunday, May 12, 2013 8:12 PM
Subject: Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel



On May 12, 2013, at 6:09 PM, "Rick Knoble"  wrote:


3. Failed oil pump.



4. Failed oil sender?

Rick
Sent from my iPhone

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Dan Penoff]

After dealing with a wonky coolant temp gauge myself, I wouldn't trust the 
gauge.  Put a mechanical gauge on it to be sure.

Dan


On May 12, 2013, at 8:14 PM, Kaleb C. Striplin wrote:

> That could be possible too
> 
> Sent from my iPhone
> 
> On May 12, 2013, at 7:12 PM, Rick Knoble  wrote:
> 
>> On May 12, 2013, at 6:09 PM, "Rick Knoble"  wrote:
>> 
>>> 3. Failed oil pump.
>> 
>> 
>> 4. Failed oil sender?
>> 
>> Rick
>> Sent from my iPhone
>> 


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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Kaleb C. Striplin]

That could be possible too

Sent from my iPhone

On May 12, 2013, at 7:12 PM, Rick Knoble  wrote:

> On May 12, 2013, at 6:09 PM, "Rick Knoble"  wrote:
> 
>> 3. Failed oil pump.
> 
> 
> 4. Failed oil sender?
> 
> Rick
> Sent from my iPhone
> 
> ___
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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Rick Knoble]

On May 12, 2013, at 6:09 PM, "Rick Knoble"  wrote:

> 3. Failed oil pump.


4. Failed oil sender?

Rick
Sent from my iPhone

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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Rick Knoble]

On May 12, 2013, at 6:48 PM, "Dan Penoff"  wrote:

> First question would be: What kind/weight of oil are you using, and what are 
> the ambient temps?

Mobil 1 5w40 Turbo Diesel, ambient temp 49 degrees Fahrenheit. Oil is full and 
does not smell like fuel. Due for a change though. 

Rick
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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Dan Penoff]

First question would be: What kind/weight of oil are you using, and what are 
the ambient temps?

Dan


On May 12, 2013, at 7:08 PM, Rick Knoble wrote:

> Hi All,
> 
> A question for the group. Last night on the way to work, the oil pressure on 
> my '92 300D dropped
> from 3 bar pegged to a little over 2 bar, while driving 60 mph. (Tach is on 
> the todo list). At idle, warm, it 
> is BELOW one bar. That is WAY too low, I know that. When cold it runs where 
> it is supposed to, but as it warms up the pressure
> drops. That is normal, just low. The following is my list of possible causes. 
> Comments PLEASE...
> 
> 1. Failed o-ring(s) on oil filter stem.
> 
> 2. Schumtz in the oil pickup from somewhere (vacuum pump, timing chain 
> guides, etc.)
> 
> 3. Failed oil pump.
> 
> Ideas? 
> 
> Pictures of gauges (Low oil pressure, failed tach, failed odometer...)
> 
> https://dl.dropboxusercontent.com/u/5902347/Photo%20May%2012%2C%2010%2027%2050%20AM.jpg
> 
> https://dl.dropboxusercontent.com/u/5902347/Photo%20May%2012%2C%2010%2028%2015%20AM.jpg
> 
> https://dl.dropboxusercontent.com/u/5902347/Photo%20May%2012%2C%2010%2028%2022%20AM.jpg
> 
> Thanks,
> 
> Rick Knoble 
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Re: [MBZ] Low Oil Pressure W124 2.5 Turbo Diesel

[Kaleb C. Striplin]

Have you checked the oil level? Is it too high? If so it's leaking diesel fuel 
from the ip into the engine oil thinning it out

Sent from my iPhone

On May 12, 2013, at 6:08 PM, Rick Knoble  wrote:

> Hi All,
> 
> A question for the group. Last night on the way to work, the oil pressure on 
> my '92 300D dropped
> from 3 bar pegged to a little over 2 bar, while driving 60 mph. (Tach is on 
> the todo list). At idle, warm, it 
> is BELOW one bar. That is WAY too low, I know that. When cold it runs where 
> it is supposed to, but as it warms up the pressure
> drops. That is normal, just low. The following is my list of possible causes. 
> Comments PLEASE...
> 
> 1. Failed o-ring(s) on oil filter stem.
> 
> 2. Schumtz in the oil pickup from somewhere (vacuum pump, timing chain 
> guides, etc.)
> 
> 3. Failed oil pump.
> 
> Ideas? 
> 
> Pictures of gauges (Low oil pressure, failed tach, failed odometer...)
> 
> https://dl.dropboxusercontent.com/u/5902347/Photo%20May%2012%2C%2010%2027%2050%20AM.jpg
> 
> https://dl.dropboxusercontent.com/u/5902347/Photo%20May%2012%2C%2010%2028%2015%20AM.jpg
> 
> https://dl.dropboxusercontent.com/u/5902347/Photo%20May%2012%2C%2010%2028%2022%20AM.jpg
> 
> Thanks,
> 
> Rick Knoble 
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Re: [MBZ] Low Oil Pressure

[clay monroe]

Aurora is a joy to shop.  Guess I could drop a bundle there for a top, but I am 
cheep, and not likely to part with cash when shoo-goo will do the job.  Maybe I 
invest in a 3-D printer and make one on myself.

clay

On Feb 21, 2012, at 7:16 PM, Jim Cathey wrote:

>> 410 pass is closed, you will have to do 12 or 90.
> 
> Even 90 was closed this morning, we had to go 'round by 12.  Urk.
> Shoulda just waited, but there were no guarantees.
> 
>> No hard top, so no defog issue.
> 
> Aurora had lotsa hard tops when I was last there.  Didn't
> want any more!  I've even got an extra one, I bought it
> for the glass.
> 
> -- Jim
> 
> 
> 
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Re: [MBZ] Low Oil Pressure

[Jim Cathey]

410 pass is closed, you will have to do 12 or 90.


Even 90 was closed this morning, we had to go 'round by 12.  Urk.
Shoulda just waited, but there were no guarantees.


No hard top, so no defog issue.


Aurora had lotsa hard tops when I was last there.  Didn't
want any more!  I've even got an extra one, I bought it
for the glass.

-- Jim



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Re: [MBZ] Low Oil Pressure

[clay monroe]

410 pass is closed, you will have to do 12 or 90.

It is a just drive it.  Bushings and fluid would be simple.  I have three 
clusters on the shelf, some other parts I pulled at PnP years ago.  Not going 
to six million $$$ man the car, but can do some fix.

Chrome is old, the whole car is old, and not been loved the way a garage queen 
would have been.  I could find pnp parts with enough time.  No hard top, so no 
defog issue.  Fans work and buttons work on ACC. No indication that AC works, 
but at least it does not blow blazing hot air all the time.

Seats are not shot.  Could use sheepskins.  Carpets are old and really could 
use replacement.  Old horse hair smell and musty carpet.  There is rust in the 
hollows of the rear shelf.  Not too deep.  Enough metal there to save with 
POR-15, then paint.  Floor has small rust spots that would be fine with sand 
and paint.


clay 

1972 220D - Gump - She is green, simple and ran
1995 E300D - Cleo - Used by the Queen of Denial
POS 1987 SDL - Beware Nigerian Scammers






On Feb 16, 2012, at 6:40 PM, Jim Cathey wrote:

>> The real issues are the transmission having an over-broad neutral.
> 
> Nylon bushings?
> 
>> Checked cold ATF and it was over full.  After the test drive, with engine 
>> running, stick was dry.
> 
> Normal, for low fluid.  Needs more ATF.
> 
>> Oil pressure indicator does not peg.  Light off, got pressure close to 3 bar.
> 
> Sender/gauge can also lie, should be checked.
> 
>> What am I missing?
> 
> $2300?  Don't forget the other SL vulnerabilities.
> Rust, primarily.  ATF and shifter bushings is nothing,
> if that's it.  ACC/Cruise may be broken.  How are the
> sunvisors?  Surprisingly expensive, and the sun eats
> them.  Chromed plastic trim pieces on seats?  Upholstery?
> Rear window defroster may be failing, the hairline wires
> in the glass fail easily.
> 
> This car is down in the "just drive it" class, rather than
> a garage queen.
> 
> We'll probably be driving past that car tomorrow, we're on
> our way to Crystal Mtn.  Gotta go around through Enumscratch.
> 
> -- Jim
> 
> 
> 
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Re: [MBZ] Low Oil Pressure

[Kevin Kraly]

Those AUTOMACTIC trannies are expensive to fix.

Kevin in Hillsboro, OR, still trying to contact the owner of that 240D

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Re: [MBZ] Low Oil Pressure

[Jim Cathey]

The real issues are the transmission having an over-broad neutral.


Nylon bushings?

Checked cold ATF and it was over full.  After the test drive, with 
engine running, stick was dry.


Normal, for low fluid.  Needs more ATF.

Oil pressure indicator does not peg.  Light off, got pressure close to 
3 bar.


Sender/gauge can also lie, should be checked.


What am I missing?


$2300?  Don't forget the other SL vulnerabilities.
Rust, primarily.  ATF and shifter bushings is nothing,
if that's it.  ACC/Cruise may be broken.  How are the
sunvisors?  Surprisingly expensive, and the sun eats
them.  Chromed plastic trim pieces on seats?  Upholstery?
Rear window defroster may be failing, the hairline wires
in the glass fail easily.

This car is down in the "just drive it" class, rather than
a garage queen.

We'll probably be driving past that car tomorrow, we're on
our way to Crystal Mtn.  Gotta go around through Enumscratch.

-- Jim



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Re: [MBZ] Low Oil Pressure

[clay monroe]

Well, it sort of works better for me.  My nemeses are red cars.  They all end 
up totalled.  Not my doing, somebody always smashes into them.

I am voting that it went black, because the red had oxidized so much and he had 
lots and lots of black.  Smooth and shiny black at this point.  The red is not 
obvious unless you look at the brightwork that has red overspray.

clay


On Feb 16, 2012, at 3:14 PM, WILTON wrote:

> Why oh why would somebody paint black a car like this that came from factory 
> in its best color - red?
> 
> Wilton
> 
> - Original Message - From: "clay monroe" 
> To: "Mercedes Discussion List" 
> Sent: Thursday, February 16, 2012 6:00 PM
> Subject: [MBZ] Low Oil Pressure
> 
> 
>> http://seattle.craigslist.org/tac/ctd/2838960203.html
>> 
>> Looked at this today.  In the rain, no obvious current leaks, but there is 
>> evidence of former leaks and rust accumulation in the shelf and passenger 
>> footwell.  Came from the factory as red, and whoever did the spray to black 
>> went wild and coated everything well.  Figure POR-15 can handle the interior 
>> rust.
>> 
>> The real issues are the transmission having an over-broad neutral.  Park, 
>> into reverse went well, but neutral remains even when indicating D.  Crank 
>> down and it goes into drive.  No shift issues on the road.  Checked cold ATF 
>> and it was over full.  After the test drive, with engine running, stick was 
>> dry.
>> 
>> Oil pressure indicator does not peg.  Light off, got pressure close to 3 
>> bar.  On the drive it fluctuated between two and almost three.  At idle it 
>> floats at 1 bar.  Goes up smoothly under power.  Cold engine oil was full 
>> but indication of mix with dirty oil, so not a clean drain and fill.
>> 
>> SO, my take is that the transmission will need some work and there is a 
>> problem with oil flow.  No obvious burning or blow by out the tail pipe. Or 
>> leaks around the engine seals.  What am I missing?
>> 
>> 
>> 
>> 
>> clay
>> 
>> 1972 220D - Gump - She is green, simple and ran
>> 1995 E300D - Cleo - Used by the Queen of Denial
>> POS 1987 SDL - Beware Nigerian Scammers
>> 
>> 
>> 
>> 
>> 
>> 
>> ___
>> 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
> 
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Re: [MBZ] Low Oil Pressure

[WILTON]

Why oh why would somebody paint black a car like this that came from factory 
in its best color - red?


Wilton

- Original Message - 
From: "clay monroe" 

To: "Mercedes Discussion List" 
Sent: Thursday, February 16, 2012 6:00 PM
Subject: [MBZ] Low Oil Pressure



http://seattle.craigslist.org/tac/ctd/2838960203.html

Looked at this today.  In the rain, no obvious current leaks, but there is 
evidence of former leaks and rust accumulation in the shelf and passenger 
footwell.  Came from the factory as red, and whoever did the spray to 
black went wild and coated everything well.  Figure POR-15 can handle the 
interior rust.


The real issues are the transmission having an over-broad neutral.  Park, 
into reverse went well, but neutral remains even when indicating D.  Crank 
down and it goes into drive.  No shift issues on the road.  Checked cold 
ATF and it was over full.  After the test drive, with engine running, 
stick was dry.


Oil pressure indicator does not peg.  Light off, got pressure close to 3 
bar.  On the drive it fluctuated between two and almost three.  At idle it 
floats at 1 bar.  Goes up smoothly under power.  Cold engine oil was full 
but indication of mix with dirty oil, so not a clean drain and fill.


SO, my take is that the transmission will need some work and there is a 
problem with oil flow.  No obvious burning or blow by out the tail pipe. 
Or leaks around the engine seals.  What am I missing?





clay

1972 220D - Gump - She is green, simple and ran
1995 E300D - Cleo - Used by the Queen of Denial
POS 1987 SDL - Beware Nigerian Scammers






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Re: [MBZ] Low oil pressure?

[barrystark]

Bill -
I guess you have checked the easy stuff. O-rings on the oil filter bolt, proper 
filter, proper oil viscosity? It is also pretty easy to drop the steel portion 
of the oil pan to see if there is loose stuff in there that may be being sucked 
into and blocking the the oil pump inlet screen. Case in point, when I dropped 
the pan on my SD to replace the turbo return line grommet, I found some old 
bits of gasket, from a previous repair, stuck to the oil screen. I don't think 
the bearing wear is so much a factor of age as the total miles. Especially if 
the oil has been changed regularly.

Barry


 Bill Gallagher <[EMAIL PROTECTED]> wrote: 
> The Westerbeke oil pressure reads:
> Start up diesel 65 psi
> 20 minutes operation 30 to 40 psi and drop to 20 psi a few times at 2200 rpm
> Throttle back psi go up to 50 to 55 then drops down to the 30 to 40 psi 
> range
> Change oil sender and unit two years ago and no problem for that year. 
> Last year oil pressure varied like above...he check sender and unit and 
> said it's seems O.K. resistance ...
> Westerbeke rep said bad bearings given the age of the motor..1978
> 
> Bill
> 1981 300 TD
> p.s. needs to check sender, unit, wiring etc
> 
> bearings
> 
>  goes from 30 to 50 psi
> 
> Kaleb C. Striplin wrote:
> > .3 is min factory spec at idle.
> >
> > Mitch Haley wrote:
> >   
> >> "Kaleb C. Striplin" wrote:
> >>
> >> 
> >>> If its above .3 bar its OK.
> >>>   
> >> I'm no Westerbeke expert, but .3 idle sounds low, and .3 cruising
> >> sounds deadly. I think it's normal to put a .5 bar low oil pressure
> >> alarm switch on an Atomic 4 gasser.
> >>
> >>
> >> ___
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> >>
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> >>
> >>
> >>
> >> 
> >
> >   
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Re: [MBZ] Low oil pressure?

[Mitch Haley]

Worn bearings will not make the pressure fluctuate up and down. 
Bad wiring on an electric gauge will. 
Flaky bypass/relief valve could too. 
If the pressure rises when you decrease RPMs, I would wonder
about oil level not being ideal.

Re: [MBZ] Low oil pressure?

[Bill Gallagher]

The Westerbeke oil pressure reads:
Start up diesel 65 psi
20 minutes operation 30 to 40 psi and drop to 20 psi a few times at 2200 rpm
Throttle back psi go up to 50 to 55 then drops down to the 30 to 40 psi 
range
Change oil sender and unit two years ago and no problem for that year. 
Last year oil pressure varied like above...he check sender and unit and 
said it's seems O.K. resistance ...

Westerbeke rep said bad bearings given the age of the motor..1978

Bill
1981 300 TD
p.s. needs to check sender, unit, wiring etc

bearings

goes from 30 to 50 psi

Kaleb C. Striplin wrote:

.3 is min factory spec at idle.

Mitch Haley wrote:
  

"Kaleb C. Striplin" wrote:



If its above .3 bar its OK.
  

I'm no Westerbeke expert, but .3 idle sounds low, and .3 cruising
sounds deadly. I think it's normal to put a .5 bar low oil pressure
alarm switch on an Atomic 4 gasser.


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Re: [MBZ] Low oil pressure?

[Kaleb C. Striplin]

.3 is min factory spec at idle.

Mitch Haley wrote:


"Kaleb C. Striplin" wrote:


If its above .3 bar its OK.



I'm no Westerbeke expert, but .3 idle sounds low, and .3 cruising
sounds deadly. I think it's normal to put a .5 bar low oil pressure
alarm switch on an Atomic 4 gasser.


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--
Kaleb C. Striplin/Claremore, OK
 (2x) 91 300D 2.5 Turbo, 90 420SEL, 89 560SEL,
 87 300SDL, 85 380SE 5.0 Euro, 84 190D 2.2,
 81 240D, 76 240D, 76 300D, 72 250C, 69 250
http://www.striplin.net

Re: [MBZ] Low oil pressure?

[Mitch Haley]

"Kaleb C. Striplin" wrote:
> 
> If its above .3 bar its OK.

I'm no Westerbeke expert, but .3 idle sounds low, and .3 cruising
sounds deadly. I think it's normal to put a .5 bar low oil pressure
alarm switch on an Atomic 4 gasser.

Re: [MBZ] Low oil pressure?

[Kaleb C. Striplin]

If its above .3 bar its OK.

Tom Hargrave wrote:


How low? Is it above 1 BAR? If so then it is not low.

Another cause for low oil pressure is using a Fram oil filter. Fram uses 2
paper elements instead of a paper on the top section & a mat element on the
bottom section. The lower mat element is the bypass filter & with an
incorrectly manufactured filter, too much oil will pass through the bypass,
dropping your oil pressure.

Thanks,
Tom Hargrave
www.kegkits.com
256-656-1924


--
Kaleb C. Striplin/Claremore, OK
 (2x) 91 300D 2.5 Turbo, 90 420SEL, 89 560SEL,
 87 300SDL, 85 380SE 5.0 Euro, 84 190D 2.2,
 81 240D, 76 240D, 76 300D, 72 250C, 69 250
http://www.striplin.net

Re: [MBZ] Low oil pressure?

[Tom Hargrave]

How low? Is it above 1 BAR? If so then it is not low.

Another cause for low oil pressure is using a Fram oil filter. Fram uses 2
paper elements instead of a paper on the top section & a mat element on the
bottom section. The lower mat element is the bypass filter & with an
incorrectly manufactured filter, too much oil will pass through the bypass,
dropping your oil pressure.

Thanks,
Tom Hargrave
www.kegkits.com
256-656-1924
 

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Werner Fehlauer
Sent: Tuesday, December 26, 2006 9:17 AM
To: Mercedes Discussion List
Subject: [MBZ] Low oil pressure?

Low oil pressure after it gets up to operating temps?  #1 cause is bad main 
bearings; or perhaps a bad pressure regulating valve on the oil pump output 
combined with a worn out oil pump combined with the wrong oil viscosity. If 
he's really lucky, just the wrong oil!

Werner

- Original Message - 
From: "Bill Gallagher" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" 
Sent: Monday, December 25, 2006 11:15 PM
Subject: [MBZ] Marine Diesel - Westerbeke


> Owner said low oil pressure after twenty minutes of operation 
> engine 1978 never rebuild
> What are the possible causes of low oil pressure AFTER 20 minutes
> operation . TIA
>
> Bill
> 1981 300 TD
>
>
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