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Originally Posted by lyonstexas
There should be a hex head section on the cam that you can use a wrench on to rotate the cam. On my 1992 300SE, it was at about a third of the way from the rear cylinder.
Tim
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No, no such luck on mine. There are a few "tabs" in the middle that look tempting - but I'm worried that I might slip and ruin a surface. MB sells a very expensive aluminum tool to hold the cam in place while you are removing the gear (like, $75 at samstag) but I'm still looking to turn the gear and $75 is a lot of dough to pay for an aluminum handle. A strap wrench looks tempting but I need very fine control and will (if someone more experienced can tell me if this is safe - see post, I only need to get it back to where it was before compression pushed it - but I'll probably make a tool out of a metal bar and a few sturdy bolts.
You may wonder, "how did this happen - you should have removed the rockers first, then it wouldn't have moved". Well, according to the manuals you don't have to do this when changing the plastic guide and tensioner arm. But, In order to take the guides off, you have to take off the gear. This is mentioned in the manuals for the RH parts in both MB and Chilton, but NOT for the left in either!!! (GRRR). This is what I get for reading them.