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
Prev Previous Post   Next Post Next
  #1  
Old 06-29-2014, 02:55 PM
Registered User
 
Join Date: Nov 2007
Location: Little Neck, NY
Posts: 110
1994 E420 M119 Low Compression, but Valve Timing OK

My 1994 E420 with 150k miles, started and ran powerless and rough after standing for about 2 weeks. Ran fine before that. I had some rotten egg smell, but no smoke of any color. Also the water pump started leaking. I removed the water pump, and while waiting for the new part to arrive, I also removed all spark plugs, all looked nice and brown, except one that was black. Next, I did a compression test on the cold engine.

Cyl PSI
8 60
7 20
6 60
5 110
4 40
3 20
2 50
1 100

I read elsewhere in the forum that my compression should be around 200, but in any case there are huge differences and very low numbers by any standard. I checked the valve timing by inserting the pin into the right outer camshaft. the timing nicely lines up with the 45 degree mark on the harmonic balancer. (I reinstalled the old water pump and balancer for this).

Now I'm thinking it might be the head gasket, but it is unlikely that both sides blow at the same time. I don't know what I'm missing here, and I hope someone can help with some good advice.
__________________
2004 E500 4Matic 138,000 miles
Reply With Quote
 

Bookmarks


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 09:33 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page