Just got the rebuilt head back and am putting the engine back together now. I have a question on the timing chain tension.

During the disassembly process we took the gear off the cam and bungied it to make sure that the tension was maintained and the chain didn't move. That worked out fine, but the timing chain tensioner seemed to creep out a bit, putting more tension on the chain. I removed the cover plate and spring to try and move it back (you could plainly see the oil line on the plunger cylinder) but it would not move back to where it was without adjusting the bottoming ring outwards just a bit to slacken it back to where it was. I had to slacken it just a tad in order to get the gear back on the cam correctly (don't worry, we marked everything very well before removal.)

Now I am wondering what is the correct amount of tension to have on the chain before I close the cover up. Can anyone give me an idea how tight the chain should be before I close up the cover ?

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Andy_M
'98 W140 S320 Black/Black
'06 W164 ML500 AMG White/Grey
'03 Porsche 986 Midnight Blue/Grey