Timing Marks

[Bay Leaf]

Hi Has does anyone have any information on the cam shaft timing marks for both banks on the 276 engine.

Thanks

 

[Steve@Avantgarde]

Behind the camshafts there are 2 lines which must line up. TDC is marked on the crank, but you will need the camshaft holding tool to lock the cams into position before disassembling anything.

 

[Bay Leaf]

Thanks for the reply. Would I have to lock the cams to change the secondary timing chain tensioners and fit oil check valves.

 

[Bay Leaf]

Hello.

 

[Bay Leaf]

Any one out there. I rearly coud do with a reply on this subject.

 

[alexanderfoti]

No to the tensioner (usually)

Yes to check valves

In either case, if access was easy, I'd lock the cams when doing any chain work, just for safetys sake.

 

[Bay Leaf]

No to the tensioner (usually)

Yes to check valves

In either case, if access was easy, I'd lock the cams when doing any chain work, just for safetys sake.

I'm a bit confused now as to why I wouldn't need to lock the cams down when replacing the tensioners, but I would have to when fitting the check valves as the check valves are a push fit into the head once the tensioners have been removed. Also watching a MB video of the procedure the cam covers weren't removed only the front timing covers. I fully appreciate that your knowledge on this matter is far greater than mine. But being a timed served mechanic (now retired) I am as I say apprehensive to do the job myself if I can't get clear picture. I'm also not against taking the car to a local independent to do the job for me if that what it takes.

 

[Bay Leaf]

After watching another youtube video and posting in the comments section I now have the info I need regarding timing etc. So I've ordered the the check valve insertion tool and when that arrives I will be ordering the parts from MB. Apparently the procedure is explained on WIS/EPC I presume that's a workshop manual disc. So I'll have a paddle round on ebay to find one.

 

[Bay Leaf]

My front timing cover bolts have blue heads does this mean that work has been done in this area as the bolts are supposed to be one time use. I'm led to believe that the bolts are not blue from the factory when the engine is new.