The link should have all you need. The head gasket comes with info on torque, tightening sequence documentation. It is included for the OM603 and should be the same for OM606. Good luck.

Index of /docs/mb/OM60X

Blown head gasket and disappearing coolant - 319K miles.

Yeah, she is down now. Oil leak progressed to the point I was putting turkey roasting pans under her to keep the puddles of oil off the garage floor. Diassembly is now to the point I am looking at the head bolts. Suppose I could just start in the midle a losen going out in stages. Worry about the tightening sequence when the head comes back from the shop.

ah kay - for the life of me I haven't found anything about cylinder heads for any engine. Will continue to look.

The center bolt is the first one to tighten, so it is the LAST one to lossen. You loosen the bolts in reverse order of tightening. So it is from the outside to the inside. Just do it outside in, left right, left right etc until you get to the middle one. The HG comes with the diagram and the torque spec. You torque it to 30nm ( if I remember it correctly ) then 90 degree, wait 10 minutes then 90 degree again. It is all in the Victor Reinz HG package. I have the FSM book for the OM603, not OM606, PM me if you have questions. Post #2 has a sequence diagram.

http://www.peachparts.com/shopforum/diesel-discussion/293175-om603-head-bolt-tightening-sequence.html

I can only find torque sequence for the 602 and the 603 on the W124 library CD.

I'll keep searching and maybe someone comes up with one for the 606 in the mean time.

Not allowed access to Startekinfo as I'm not a US resident :(

Sunday evening, the head is on the bench! Thank you gentlemen for all the help. Next question, what is the story with the pre-chambers? I would like to take the head to the shop tomorrow. Should the retaining ring and heat shields be removed or is that something the shop does? I guess they will tell me tomorrow but I would like some feedback before I go there. The injectors and glow plugs are out. The head is stripped except for pre-chamber retaining rings and heat shields. Thanks again. I could not have done this without your help.

Friz,

It's in writing on the first screen snap, bottom line

Picture 1) "engine 606 head bolt tightening sequence is the same as engine 603"

Picture 2) shows the head bolt tightening sequence for engine 603.

Ben

That's great Benedict! Thank you for the research. I have the tightening procedure and now the sequence. Any comment on my pre-chamber question?

Leave 'em alone, let the shop decide. If they are removed, there is a seal under each that must be replaced.

Took your advice. Machine shop said they wanted then out but didn't have the special tools. Took the head over to Star Import Service here in Gainesville and they removed them while I waited. They said they would also install them. Star Import is a Mercedes only shop. Not cheap but very good. Thanks for the advice.