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

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-11-2006, 07:56 PM
Brooklyn,NY
 
Join Date: Apr 2005
Location: Brooklyn,NY
Posts: 252
timing chain cover removed. gasket broke. help!

Hi guys,

I went to mechanic today for him to remove my timing chain cover to install new guides. One of inner guide was broken and missing. During removal mechanic damaged oil pan gasket and left gasket where timing cover meets the head. Is it possible to put silicone sealer on on gaskets to prevent leaks? Otherwise he says I need to replace whole head gasket. What can be done?

Thank you.
Car is 92 500sel.
__________________
1999 ML430 Silver 135k ml
Smoked LED taillights, Alpine in-dash DVD player, 12" sub, Pioneer components, 2 amps, 4200k HIDs, ML55 headlights, 20" rims, mirror LED blinkers

SOLD. 1996 E320 145k ml. Burgundy

SOLD but miss it everyday 1992 500sel Black
Chime buzzer mod,Alpine CD/MP3 player with stock amp,Euro headlights,S600 grill,20" rims, BEST CAR EVER!

SOLD. 1990 300E White
187k ml,smoked tails,Euro headlights,17rims,Intake,12" sub in first aid kit,alarm/autostart,buzzer mod

Reply With Quote
  #2  
Old 04-11-2006, 09:23 PM
Registered User
 
Join Date: Sep 2004
Posts: 142
I'm assuming he removed the oil pan to remove the FOD from the old rails.

I'm assuming he also removed a valve cover to acess the timing chain.

As a rule, you should not need any kind of sealer thats not part of the gasket (some gaskets come with a sealer which is dry to the touch, but seals under heat/pressure (ie installation))

If the mechanic is even contemplating reusing a head gasket, he is an idiot and I would never trust another car to him if my life depended on it. If he's refering to a valve cover gasket, thats a different story. Sometimes you can reuse a valve cover gasket, but rule of thumb is when in doubt replace it. I'm replacing a valve cover gasket on my car tonight becuase I suspect it may be the cuase of a leak and it has a flat spot in it where it shouldn't. It's less than $10.

Head gaskets typically run for $75 to $100 depending on the car
Valve cover gaskets typically run $5 to $20 depending
Oil pan gaskets $10 - $30

Check on Fastlane for your specific car and you can get an idea. For what the mechanic is charging you per hour, it's probably cheaper for you to have him do it right and replace the gasket rather than pay him for his time to Jerry-rig an old gasket with silicon. (Gaskets are meant to be replaced from time to time, seldom reused)

Again, I'd be skeptical of him needing to pull a head for new guides... perhaps there's more difference between the 119 and 117 engine than I know of. Hopefully another member with some 119 experiance can chime in.


Good luck
Reply With Quote
  #3  
Old 04-11-2006, 09:28 PM
Strife's Avatar
General Purpose Geek
 
Join Date: Apr 2004
Location: KY USA
Posts: 2,238
Well, the manual for a 117 claims that if care is taken, the head gasket can be preserved when removing the front cover. Obviously, this didn't happen here although the engine is a little different. I wouldn't trust anything but a gasket in this high-heat area, I think silicone would simply vaporize. Yeah, I know that this is a lot of work/$$$$...
__________________
86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm
Reply With Quote
  #4  
Old 04-12-2006, 12:10 PM
Registered User
 
Join Date: Mar 2006
Location: Scotland
Posts: 143
You should be ok patching the oil pan gasket with "blue hylomar", the cylinder head gasket area you are talking about is not subject to combustion pressure and you might get away with sealing it with the same stuff so long as you make sure the gasket ends are butted tightly together during reassembly.
If it leaks tell your "mechanic" to get it fixed FOC as he broke it.!!!!
Geo.
Reply With Quote
  #5  
Old 04-12-2006, 08:37 PM
Registered User
 
Join Date: Jul 2000
Posts: 638
potential leak at head/valve cover/case joint

MBZ did a 'fantastic' job using CAD to design this multi-surface joint--beautifully precise on paper. Unfortunately, when you have gaskets that must seal across multiple surfaces--it becomes extremely difficult to remove any one of those surfaces and replace it without some kind of damage. Hell--it is IMPOSSIBLE to keep this joint on the V-12's from leaking with all new gaskets, much less removing one part and reinstalling.


I think it is unfair to ask the mechanic to do the head gasket replacement free. That probability is inherent in that work. Sometimes you can clean the joint well and use the MBZ special sealant with good results.Sometimes it leaks. I would not pull the head--I would clean carefully, completely, lastly with rubbing alcohol, and use the MBZ part # stuff specifically called for and not worry.
Reply With Quote
  #6  
Old 04-13-2006, 09:57 AM
Brooklyn,NY
 
Join Date: Apr 2005
Location: Brooklyn,NY
Posts: 252
Thanks for suggestions, guys.
Shop owner provided me with space in shop where I can work on car myself. I will reassemble car myself. And I will replace upper oil pan gasket because I am still very skeptical that it will not leak even when sealed with sealent. Top front head gasket will have to be sealed. No point to pull heads to replace it. One corner of head gasket is broken badly. Only metal insert is left. Sealing material is missing. So perhaphs using a lot of sealent/gasket maker will prevent leaks. Now I just need to find that sealer "blue hylomar" or speacial MBZ sealer.
Can I buy "blue hylomar" in Autozone?
Thank you for help.
__________________
1999 ML430 Silver 135k ml
Smoked LED taillights, Alpine in-dash DVD player, 12" sub, Pioneer components, 2 amps, 4200k HIDs, ML55 headlights, 20" rims, mirror LED blinkers

SOLD. 1996 E320 145k ml. Burgundy

SOLD but miss it everyday 1992 500sel Black
Chime buzzer mod,Alpine CD/MP3 player with stock amp,Euro headlights,S600 grill,20" rims, BEST CAR EVER!

SOLD. 1990 300E White
187k ml,smoked tails,Euro headlights,17rims,Intake,12" sub in first aid kit,alarm/autostart,buzzer mod

Reply With Quote
  #7  
Old 04-13-2006, 11:08 AM
Registered User
 
Join Date: Mar 2006
Location: Scotland
Posts: 143
"Blue hylomar" should be readily available from auto accessory stores, at least it is in UK. It's what Rolls Royce used to use on their car engines.
Geo.
Reply With Quote
Old 04-13-2006, 11:08 AM
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 04:35 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, 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