Quote:
Originally Posted by X5chemist
The one technical item no video even mentions is timing. Does timing need to be set? I did a tensioner on a Benz 2005 C240 2.6L Timing had to be set at 40 degrees before TDC. At the timing mark, the chain is loose. The tensioner comes out and goes in easily. If timing is not set, screwing in a tensioner can strip threads, break guides, or even break the chain.
From videos seen, the M54 does not require a timing mark set to install a new tensioner.
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From my understanding the timing is all set when the cams and vanos are all put in, then the slack is just taken up on the back of one of the guides with the tensioner. Even though there's a spring behind the tensioner I believe oil pressure actually pushes through the tensioner too. I saw a little oiling hole when I had mine out so it made me wonder if the spring does anything unless the motor is off.