I removed the bolts and everything else , and the head doesn't budge. See pics. Do the hex bolts also have to be removed. I tried with a long breaker bar and they didn't budge. If they have to come off, any suggestions,ticks etc.
Thanks Ray M

Attached Thumbnails

   

Are there bolts into the front cover (timing chain area) or on the part of the head that extends towards the power steering pump? IIRC a 617 has 22 head bolts and 4 smaller bolts around the front.

Sixto
87 300D

Yep, four small cap screws.

Two are outside the timing chain gallery and two are inside the chain gallery.

Your mission, Ray, should you decide to accept it, is to use an allen wrench to unscrew these two socket head cap screws without dropping them down the timing chain abyss. If you are caught or killed during this process (because you might be tempted to kill yourself), the secretary will disavow any knowledge of your actions.

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

See...Engineers can be funny!

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

If you are absolutely sure that everything is disconnected, and the head is ready to be removed.....hook up the battery and tap the starter a coupla times......the compression will assist in loosening stuck gaskets....

SB

__________________

Diesels:
'85 300D, "Max, Blue Benz", 155K, 27.0 MPG
'84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG
'77 240D (parts car)
'67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP)
Gassers:
'94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG
'85 190E 2.3, 148K....Parts Car
'58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG

Sadly, this will result in a catastrophe if the chain is sitting loose in the gallery. The best scenario is a total loss of timing between the crankshaft and the camshaft. I don't even want to talk about the worst scenario.................

You really ought to delete this post.

Someone needs to delete this post before anyone actually tries it!

__________________
Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/mercedes-benz-cars-sale/296386-fs-1-owner-83-mb-300d-turbo-rebuild-parts.html

Once all the bolts are removed, there isn`t all that much holding the head.

the hanes manual said to whack the head with a piece of wood and a hammer to brake it loose from the gasket. after much whacking, and nothing moving much. I talked to my mechanic, he said to use a small pry bar, (been over a yr since I did this after my timing chain fiasco) in the front edge of the head. pry down and the head will lift up. didn`t take much.

That thing is a heavy sucker, be careful.

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

I am dis assembling the entire engine learning about it. The head and block remain. The large allen bolts on top i suppose do not need to be removed. How do you pull the pin that holds the chain guide. I couldn't get a buyer for the engine, or car. I'm disassembling the whole car,wires bolts clips,parts. I'll get some pics to show my point of removal on the engine

Or put a block of wood against the head and tap it with a hammer. That way you don't destroy your timing chain, and do a bunch of other very expensive damage.

__________________
2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

How's that work out for you with the locating pins that position the head..........????

Whats the best way to pop the old head gasket?

__________________
2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

The best way.........and easiest.......is to use an engine hoist. Of course, if you want to kill yourself............

Installation of the head is also greatly simplified with the hoist. It's not easy to lower the head carefully by hand down onto the gasket.

Finally, the use of the hoist for removal guarantees that you have all bolts removed and are simply secured by the gasket. In the case of the OP, we really don't know if he has a gasket issue or a bolt issue. If all bolts are removed, the head comes right off with the hoist.

Since the car is at the end of its life cycle. . Maybe someone used some kind of a high tech gasket sealer on the last head gasket change and is kind of glueing the head to the block? You could do this with a cast iron block and head. Still would separate. May take more effort than usual.

Thats providing all the bolts are out of course. The hoist nominally can apply several huindred pounds separation force easily. Bracing the engine upright on the ground and using a conventional hoist pulling only on the head would be simular I imagine.

Stay well back though in case the engine still tips when the head releases. Also stand well in front or behind it while pulling. Not worth geting hurt over. Never is.

Brians infference he may not realise how heavy the head is compared to other cars factors in as well.