Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 07-23-2001, 04:52 AM
Registered User
Join Date: Feb 2000
Posts: 171


While leaving a concert, I noticed my oil pressure to be quite low. I was stuck in traffic, and the gauge read somewhere near the 2 mark. I have an '85 190E 2.3. Is this normal? When I step on the accelerator, the pressure goes up. Does this have to do anything with the type of oil I'm using and it's viscosity?


Reply With Quote
Old 07-23-2001, 08:29 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
MB publishes only 2 specs on oil pressure. One is at idle, 0.5bar(7psi@sqin)min. Then at 3000 rpm the pressure must be above 3bar. Sounds like your pressure is very good!
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
Old 08-21-2001, 09:19 PM
Registered User
Join Date: Aug 2001
Location: California
Posts: 177
Unhappy Oil Pressure

I recently aquired a 1991 190E 2.6.
The car has 96k miles on the clock. The previous (original) owner
had oil changes done every 3k miles.

The car drives v.well and the engine is quiet. However, I have noticed that the oil pressure gauge never quite reaches the '3' marker - even when cold.

When fully warmed-up - after a 25 mile freeway drive, the gauge usually hovers halfway between 0 and 1 at idle.

However, today, after exiting the freeway, the needle appeared to bottom out whilst idling. I shifted into neutral and the needle climbed to its usual position between 0 and 1.

Although the engine oil is clean, I plan to do a filter/oil change within the next few days. The plugs are also clean - light brown color.

What do you suggest?

1991 190E 2.6 170k
1995 E320CA 57k
1999 Chevy Tahoe 98k
2000 R1150GS 45k
1983 300CD 178k - sold, but not forgotten
Reply With Quote
Old 08-21-2001, 09:44 PM
Ashman's Avatar
Registered User
Join Date: Sep 2000
Location: Sherman Oaks, CA
Posts: 4,749
At idle the gauge can read anywhere from .7 to above 3 if I am correct.

When on the gas it should read above 3 always as far as i know.

My car at idle is usually at 2-3 and under acceleration always at 3+. It does dip down occasionally at idle below 2 if I am sitting in traffice long enough.

'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon
Reply With Quote
Old 08-31-2001, 03:14 PM
Registered User
Join Date: Aug 2001
Location: California
Posts: 177
Cool Oil Pressure update

Changed the engine oil & filter today. Valvoline 10w40.
With engine at normal running temperature, Oil Pressure now pegs at 3 whilst driving and goes to 1 at idle.
Same readings after 20 mile freeway journey.

Conclusion; dirty oil and/or clogged filter causing low oil pressure reading.

1991 190E 2.6 170k
1995 E320CA 57k
1999 Chevy Tahoe 98k
2000 R1150GS 45k
1983 300CD 178k - sold, but not forgotten
Reply With Quote
Old 08-31-2001, 03:37 PM
Posts: n/a
There's really nothing to worry about regarding low oil pressure if it idles hot at .5 bar or greater.

Cummins regulates their oil pressure at 15PSI claiming that excessive oil pressure does nothing except wastes fuel.

The main thing with these engines is that it pegs or close to it when you're at speed.

Don't worry about it, keep changing the oil frequently, and sleep well.

Have a great day,

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
oil change wyoo Tech Help 43 03-29-2017 02:54 PM
'85 300cd oil pressure underp2 Diesel Discussion 18 09-27-2004 11:03 AM
Low hot idle oil pressure 94 420E psfred Tech Help 24 06-07-2004 08:22 AM
HELP... oil pressure gauge still at 0 ! Joseph_H Tech Help 9 01-20-2003 05:31 PM
Oil Pressure Problems 87 190D petef Tech Help 13 04-03-2001 08:58 AM

All times are GMT -4. The time now is 08:54 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page