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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-27-2013, 12:50 PM
Registered User
 
Join Date: Jan 2013
Location: Palo Alto CA
Posts: 13
om617.952 head won't come off

Hey, I pulled off the valve train, head bolts, manifold, power steering/fuel filter block, water pump oil feed, rear strap, and something's still holding the head on in front. I can pull the rear up a bit. Also, I undid all valve parts and removed the springs. Can't believe it won't come off yet.

Any suggestions what to look for?

thanks
S
Reply With Quote
  #2  
Old 01-27-2013, 02:08 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,249
Did you remove the pin that holds the chain guide?
__________________
Jim
Reply With Quote
  #3  
Old 01-27-2013, 06:42 PM
Registered User
 
Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
There are 3 or 4 small 6mm bolts in the front of the head. look down inside the chain galley and you will see at least 2 of them, and there is one or 2 on the outside.

Charlie
__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
Reply With Quote
  #4  
Old 01-28-2013, 04:10 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,453
If you are sure that you've got all of the bolts out =>

Crank the engine over by hand - now that the valve train is off - you'll get a little bit of compression that will help pop the head off.

Make sure the timing chain doesn't get tangled when you do this. Being lazy and using the starter instead of a ratchet handle might make an expensive comedy moment. Consider yourself warned.

The head is possibly stuck to the head gasket that is possibly stuck to the block.

Gentle taps with a rubber hammer can also help.
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #5  
Old 01-28-2013, 09:25 PM
Registered User
 
Join Date: Jul 2007
Location: Upstate South Carolina
Posts: 1,123
Just removed one myself today. Like Charlie said, 2 bolts down inside timing chain gallery, on front of head and there is 2 on left side (P/S pump side) on outside of head. 1 of them is actually around on backside of timing chain gallery.
Reply With Quote
  #6  
Old 01-28-2013, 11:02 PM
Registered User
 
Join Date: May 2011
Location: Seattle, WA
Posts: 74
The bolts are labled as "a" in the FSM headbolt tightening diagram. And others have said there are two in the engine and two on the outside.

Question- Are these bolts labled "a" long enough that dropping down into the engine uppon removal is not a risk? I would imagine they must at least be as long as the head is tall, right? Just asking because I am about to pull the head on my 240D
Reply With Quote
  #7  
Old 01-28-2013, 11:17 PM
Long Time Diesel Fan
 
Join Date: Sep 2009
Location: The Great Central Valley
Posts: 37
Fencing pliers

When I was removing one of those heads in the pick, I ran into the same issue. I tried all the tricks I had rad about but nothing was cooperating. I could not find a spot to get a wedge in there to break the seal. Those castings are exact. I did notice a small piece of flashing on the front leg of the head. I used the pick under the flashing, and used a long head bolt across the water pump and the vacuum pump to pry against. Couple of jerks, and the head was loose.

Hammerwerfer
__________________
1985 300DT 241,000 miles
1979 300SD 202,000 miles
Reply With Quote
  #8  
Old 01-28-2013, 11:18 PM
Registered User
 
Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
Anything dropped down in the engine is a bad thing. maybe stick some rags in there to catch one if you drop it. I have one of those telescoping magnets (actually got it a Sears a couple yrs back when they were 99 ea, now about $2) stick it down next to the bolt and it will hold it as you lift it out. they are strong for their size.


Charlie
__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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 06:06 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page