Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 04-08-2003, 05:40 PM
junk man's Avatar
Registered User
Join Date: Mar 2003
Posts: 6
gas in oil

will a bad fuel pump cause gas to mix with engine oil? the car is a 72 250.

Last edited by junk man; 04-08-2003 at 05:48 PM.
Reply With Quote
Old 04-08-2003, 05:56 PM
Registered User
Join Date: Jul 2001
Location: SoCal
Posts: 1,303
Is that FI? If so, is there a return hose from the fuel pressure regulator to the breather? That would likely indicate a ruptured diaphram.

Another possibility is fuel leaking past the rings when the engine is cold. This is normal to a degree, but it should burn off after 10 mi or so of driving. Lots of short trips without the engine warming up could cause the smell.

Reply With Quote
Old 04-08-2003, 09:52 PM
Super Moderator
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,315
A hole in the fuel pump's diaphragm will cause fuel to get into the oil.
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
Reply With Quote
Old 04-09-2003, 07:54 PM
junk man's Avatar
Registered User
Join Date: Mar 2003
Posts: 6
Thumbs up

it is not FI. when I get the time I will check the fuel pump. snow and mud here. thanks for your replies.
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 08:21 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page