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 11-23-2001, 03:26 PM
Posts: n/a
Leaking head gasket

Can anyone tell me what the symptoms are for a leaking head gasket? After telling my dealer that my SL320's engine was misfiring occasionally, suffering from terrible gas mileage (less than 10 mpg), and sputtering every now and then (remedy is to shut down engine and restart == problem usually disappears), my service advisor informed me that my head gasket was leaking and that the engine harness had to be replaced -- both of which he said were very large jobs. Given the extensive threads on the M104 engine harnesses, I wasn't too surprised that my harness needed to be replaced (1995 engine with about 55,000 miles). However, I was sort of shocked that my head gasket had failed -- my SL hasn't leaked a single drop of oil into the engine bay or my garage floor since I bought it. Are there any other telltale signs of a head gasket failure (other than dripping oil)?
Reply With Quote
Old 11-23-2001, 03:44 PM
Posts: n/a
Besides leaking a little oil (not much), the problem I noticed was oil in the water. Looking at the overflow tank, it looked like a chocolate milkshake. The car ran perfect. I have not heard of any leakage from the cylinders themselves, just oil leaking out of the engine and also into the water. I cannot seem how the "normal" 104 head gasket leak would give you the problems you are having.

As far as how big, rough figures are $1000 for each. Sometimes you get a break, others do not.
Reply With Quote
Old 11-23-2001, 04:03 PM
Posts: n/a
pfphipps -

thanks for your response . . . I'm told that the misfire, bad gas mileage and occasional sputtering are related to the faulty engine [wire] harness and that the leaking head gasket was just something they noticed when they were performing an oil change. My service advisor didn't really offer any explanation as to what happens as a result of a leaking gasket other than oil escapes from the cylinder heads (and that I should really consider replacing the gasket). Given that gasket replacement is covered by my Starmark warranty, I already approved the service, but am now wondering whether more problems are going to be created by the replacement (it's supposedly a complex job, requiring the removal of a lot of engine parts).
Reply With Quote
Old 11-24-2001, 02:22 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
It all depends on the tech that is performing the work. I usually won't do a head gasket until there is noticeable loose off oil on the rear or front of the head resulting in spots on the client's garage floor.

Many times when doing a head gasket, I will find things out of place that other techs caused. So, it is possible to correct problems...
Donnie Drummonds
Reply With Quote
Old 11-24-2001, 10:34 PM
Posts: n/a

Thanks for your response. If you did't have any obvious oil leakage on your garage floor, would you tell the dealer to hold off on the gasket replacement? My dealer hasn't started the job yet as they are still waiting on the replacement part (the gasket, I guess).
Reply With Quote
Old 11-25-2001, 05:31 PM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,234
Take advantage of the "starmark" and get the head gasket done. Also, mention to them that you know that the wiring harnesses on these cars are known problems. The paperwork that came with my E320 shows the head gasket and wiring harness having been performed under warrently at the dealer at around 65k.
Reply With Quote
Old 11-26-2001, 06:44 PM
Registered User
Join Date: Jan 2001
Location: Alexandria, VA
Posts: 38
Smile Wiring Harness

I just had the wiring harness replaced on the E320 and MB picked up the cost of the part. I paid the labor. I think I was told there is a national MB warranty for the harness. If you have the Starmark it might cover it regardless. I also had the head gasket replaced and there was noticeable oil leakage coming from the right front corner of the head. That was after the front cover had been resealed. Do both and you have accomplished repairing what I am told are the two most common 104 problems. Good luck.
BTW, the car had 106,000 miles on it when this work was done.

1997 S600 Coupe
2002 Lexus SC430
2004 Lexus RX330 (wife's car)
1993 500 SEL
1994 E320 (wife's car)
1987 300 SDL
1978 450 SEL
1980 300 TD (wife's car)
1969 280 SL
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
leaking head gasket on a C280 - need advice sgyorffy Tech Help 6 02-21-2008 10:12 AM
603 head gasket, trade for 103 head gasket? sixto Mercedes Used Parts For Sale & Wanted 0 05-12-2003 03:08 PM
Head Gasket help on a 190 E 2.6 DIYBenzer Tech Help 33 01-22-2003 12:32 AM
The ole head gasket job gmask Vintage Mercedes 10 10-28-2002 12:58 PM
Bad Head Gasket on C280... David C Klasse Tech Help 16 02-18-2001 07:49 PM

All times are GMT -4. The time now is 08:36 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