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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-27-2001, 01:51 PM
Registered User
 
Join Date: Jun 2001
Location: the netherlands
Posts: 203
I'm changing a head gasket on my 220D from 1973 tomorrow, (in about 14 hours), and I'm still not totally sure on the torque settings. The only book I've been able to find is for models from 1976 on.

This.......


......Tightening stages, tightening torques in mkp. The first three stages
are with engine cold, and the last is with the engine warmed up and run
for 5 minutes at operating temperature of 80 degrees C. First stage=4,
second = 6, third = 9, and fourth = 9.


Note that these are straight torque figures, and don't use degrees of
rotation like later ones.


You should retighten again after 300-1000km. This should be done even
though the unscrewing torque might be more than the tightening torque,
so it might appear that the screws are tight enough. "Each screw should
be slightly loosened in the sequence laid down in the screw schedule and
should then be retightened to the prescribed tightening torque. Under
no circumstances should all screws be unscrewed in one operation then
tightened."


.......is what I'm going to go on.

Just to complicate matters a new engine was thrown in in 1992, brand new, from Germany like. On the front is stamped 615 015 1101.

The guy from the local Mercedes garage says that those numbers are worthless, but then he was expecting to see number stamped on the block by the pump.

Any comment, or directions towards technical specs on line would be HUGHLY appreciated.

Thank you in advance,

Richard.
__________________
306D 1975 (camper) - rusting away
W116 450 SEL 1975 - sold
W114 long wheelbase ambulance, 3 litre diesel 1974

VW Golf 1 convertable - midlife crisis item
VW T4 van - support vehicle
Reply With Quote
  #2  
Old 06-27-2001, 11:28 PM
Registered User
 
Join Date: Feb 2001
Location: SE PA
Posts: 63
I can't say for certain on the Benz, but on the cars I have a lot of experience on, I've seen changes in the torque specifications for the cylinder head evolve over time with changes in the technology used in the head gasket. Most head gaskets come with specific instructions from the manufacturer of the gasket and they are what I follow. Few require retorquing after run-in and most use protractor torquing for the final stage. One caveat is that most of the engines using protractor torquing are using stretch bolts so it's conceivable that you would need to change the bolts to obtain the best results.
Reply With Quote
  #3  
Old 06-28-2001, 01:07 AM
Senior Member
 
Join Date: Apr 2001
Location: Beech Island, S.C.
Posts: 468
I have never read a repair manual that gives the correct toruqe. In my experience if you go by the manual you'll be replaceing the head gasket again. My way is torque the head to the specified torque and then (2) 90 degree turns. Its going to feel like the bolts are going to break but they will be tight.
Reply With Quote
  #4  
Old 06-28-2001, 01:26 AM
Registered User
 
Join Date: Jun 2001
Location: the netherlands
Posts: 203
Quote:
Originally posted by Stan Pittman
My way is torque the head to the specified torque and then (2) 90 degree turns.
Those are the instructions my book gives for allen bolts with 12 sides. For the 6 sided they give only torque settings, not angles.

I'll be finding out in a couple of hours which I'm dealing with, hopefully the 12 sided as there is less chance of them needing replacement.

Thank you everyone for your prompt replies.


__________________
306D 1975 (camper) - rusting away
W116 450 SEL 1975 - sold
W114 long wheelbase ambulance, 3 litre diesel 1974

VW Golf 1 convertable - midlife crisis item
VW T4 van - support vehicle
Reply With Quote
  #5  
Old 06-29-2001, 12:14 PM
Registered User
 
Join Date: Jun 2001
Location: the netherlands
Posts: 203
Update.......

.......head off in two hours, wrong head gasket, seems the number on the front of the block doesn't mean anything, they expected to see a serial number next to the injection pump, and even taking in the old head gasket to the Merc garage didn't help them with their somewhat confusing data base.

Now a wait to see if the next one to arrive is the good one, dammit.

Inspected the head, and there's a hairline crack between one of the valves, and one other one radiating out form one of the valves.

Invest in another head? It was running fine before the operation, except for blowing steam out the exhaust due the cracked head.

Does anyone know if the head of a 200D will fit on a 220D block? The 200D head is from about 1978.
__________________
306D 1975 (camper) - rusting away
W116 450 SEL 1975 - sold
W114 long wheelbase ambulance, 3 litre diesel 1974

VW Golf 1 convertable - midlife crisis item
VW T4 van - support vehicle
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 03:15 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, 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