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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-18-2006, 07:45 PM
dieseldan44's Avatar
Registered User
 
Join Date: Nov 2006
Location: Boston
Posts: 2,040
82 300DT Oil Pressure Questions

hey guys - i searched a bit in the archive but I want to get some opinions on what I am seeing. this is my first day with a W123 (or a MB or a diesel - as i say newbie alert), so go easy on me.

when i got the car, the oil was ~2.5 quarts down to begin with. i don't yet know the ultimate origin of this. i refilled with Rotella 15W40 this am.

started the car and oil pressure shot up to 3. good. went driving for a while and noticed the pressure start to drop to about 1.75 when off the accelerator. as soon as i go back to the accelerator the pressure shoots right back up to 3.

is this ok? i have read so far people dont like their gauge go under 2, ever.

there are 3 small oil leaks i have noticed so far.
1.) the passenger side line that goes from the bottom of the radiator to the oil pan. looks to be that junction. small amount of dripping after driving.
2.) oil seemps out of the filler cap, enough to be seeping down the side of the valve cover after my 20 minute drive. does this mean i just need a new filler cap?
3.) some oil on the air filter. lots to read in the archives on this.

my ultimate question is am i in major danger? would the leaks be causing be causing that lack of oil pressure after its warmed up?

thanks for all the help,
dd

__________________
-------------------------------
'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
Reply With Quote
  #2  
Old 11-18-2006, 08:00 PM
ForcedInduction
Guest
 
Posts: n/a
Quote:
Originally Posted by dieseldan44 View Post
is this ok? i have read so far people dont like their gauge go under 2, ever.

there are 3 small oil leaks i have noticed so far.
1.) the passenger side line that goes from the bottom of the radiator to the oil pan. looks to be that junction. small amount of dripping after driving.
Pegged gauge is normal. Factory manual says it can drop as low as 0.3 bar at idle and should peg again before you reach 3000rpm.

The line going to the radiator is the transmission cooler. Check your ATF level asap.
Reply With Quote
  #3  
Old 11-18-2006, 08:00 PM
ImBroke's Avatar
Diesel way of Life
 
Join Date: Jun 2004
Location: Cleveland, NY
Posts: 2,215
DD, congrats on your purchase. Hopefully you'll enjoy your Mercedes Benz.

Oil pressure sounds normal to just a little bit low. Possibly nothing to worry about. If you don't know what kind of oil is in there now, definitely do a change soon, with a diesel oil. Since your pressure is just a little on the low side, could be someone just threw in some possibly straight weight oil. Never know unless you change it yourself, or have good records. Sounds like normal seepage around the fill cap. The newer plastic ones don't seem to seep like the older metal ones. Could need a new sealing ring on the inside of the cap. But, I don't know if they have them available. I'd go with a new cap. A little oil on the air filter is normal also. The one thing I'd be concerned with is the possible oil cooler line problem.
__________________
05 Mustang GT Vert (3) 101k
12 TSX Wagon Tech (66k) (93k)
03 CL Type S manual (157k) 163k
06 Subaru Outback base (135k) 153k
95 Del Sol (93k) 290k
93 Stealth ES (167k) 169k
18 Silverado 2500 LTZ Midnight (212) 4700
90 350SDL 253k

http://mefi.us/images/fuelly/sig-us/86307.png
Reply With Quote
  #4  
Old 11-18-2006, 08:01 PM
ImBroke's Avatar
Diesel way of Life
 
Join Date: Jun 2004
Location: Cleveland, NY
Posts: 2,215
Looks like I was a touch too late... Congrats FI.
Reply With Quote
  #5  
Old 11-18-2006, 08:46 PM
dieseldan44's Avatar
Registered User
 
Join Date: Nov 2006
Location: Boston
Posts: 2,040
thanks guys...

will check ATF tomorrow first thing. maybe i have not properly isolated the oil leak in that region yet, i shouldn't get engine oil leaking from that cooler line? must it be leaking from somewhere else up above? (btw, the one on the passengers side of the pan is the one thats leaking...

will update when i go back to it tomorrow...
__________________
-------------------------------
'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
Reply With Quote
  #6  
Old 11-18-2006, 08:53 PM
ForcedInduction
Guest
 
Posts: n/a
Quote:
Originally Posted by dieseldan44 View Post
(btw, the one on the passengers side of the pan is the one thats leaking...
It could be the ATF cooler line (The ATF may be brown/black if it's old oil) it could also be one of the oil return lines in that area (The turbo and CCV oil from the air filter drain into the oil pan on the passenger side.).
Reply With Quote
  #7  
Old 11-19-2006, 09:54 PM
dieseldan44's Avatar
Registered User
 
Join Date: Nov 2006
Location: Boston
Posts: 2,040
ATF fluid fine, oil pressure stable, but still have a slow leak

the ATF fluids was fine, red and full.

oil pressure was stable driving, 1.5 at idle after warm.

i still have oil leaking from somewhere above the passenger side of the block. ill prob need to steam clean to track it down - i just cant see where its coming from. might be the oil return line...cant tell yet.

-dd

__________________
-------------------------------
'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
Reply With Quote
Reply

Bookmarks

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




All times are GMT -4. The time now is 06:55 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