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

Closed Thread
LinkBack Thread Tools Display Modes
Old 09-18-1999, 09:37 AM
Registered User
Join Date: Sep 1999
Location: Cremona, Alta, Canada
Posts: 263
I have a '82 300SD with 100k. How long should it take for the oil pressure to come up when you start? Also after the car has sat awhile and I take off the oil filter cover to change the oil the canister is empty. I changed the 2 O-rings but it still drains away. Any suggestions?

Old 09-18-1999, 07:14 PM
Aaron's Avatar
Join Date: Aug 1999
Location: Cincinnati, Ohio
Posts: 1,937

Oil pressure should rise up to 3bar (45psi) a couple seconds after you start the car and should rise immediately upon acceleration after the engine has reached a normal operating temp of 80 degrees celsius. At idle during normal operating temp, the needle should hover around 1.5 bar on the gauge. Also, you mentioned about changing your oil. Which o-rings did you replace? You only need the copper one for the drain plug and the big rubber one for the filter canister cover. The metal one can be thrown into your "spares" bin. After you change the oil when you start the car for the first time with the fresh oil in it, it might take a few seconds for the gauge to register 3bar. Once it reaches 3bar, you can shut down the engine, wait a couple of minutes, then check the oil. Hope this helps!

Aaron Greenberg
MB technician
'67 250SE Cabriolet
'77 450SL
'79 6.9
'79 6.9
'80 300SD
'81 240D
'85 380SE
'89 420SEL
'93 300E 2.8
Old 09-18-1999, 10:29 PM
Posts: n/a
Changing the two little o-rings on the bottom of the oil filter housing lid shaft is needed when they become brittle and hard. At least every 100K. And when you lift this lid, the oil is supposed to drain out of the housing and in to the oil pan. This should be done before draining the oil out of the pan (or sucking it up out of the dipstick: except in Denver).
Now the oil pressure as stated should peg the oil gauge needle within a few seconds when starting the engine.

Old 09-19-1999, 02:04 AM
Registered User
Join Date: Sep 1999
Location: Cremona, Alta, Canada
Posts: 263
Thanks for the replys. The O-rings I refer to are the ones on the bottom of the tube that is part of the oil filter canister top. If I am correct they seal the oil drain hole for the filter housing so when you pull up on the lid the oil drains away. My problem is that I think the oil is still draining after the car sits for a while (several hours). Is there any other way the oil can escape the filter housing when the engine is off?

Closed Thread


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 12:50 PM.

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