Quote:
Originally Posted by Dave
I had a VR6 Jetta, and didn't recall such issues with a chain. Of course, that was a while ago, and that car got badly hit at 40K mi., and I sold it.
But, obviously, you picked your van up at a very good price. Did she not run because the chain tensioner was having issues? Or, was it making nasty noises that scared the previous owner into dumping it?
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The "tensioner" issue is pretty well known if you go look at vwvortex, EV_Update, etc. The plastic gets old and and breaks.
Some of the 99-00 VR6 Eurovans had an intermediate sprocket failure too.
The van I bought wouldn't idle and the VAGCOM showed the timing all over the place and had several timing related codes. So the mechanic diagnosed it as needing a chain. Basically it would smooth out at 3k rpm and run fine. They figured a tensioner had broken that allowed the chain to flop below 3k and then above that it would tighten and run right.m
I did my own research and diagnosis when I got it and agreed that it was timing related and "probably" a chain issue. When I took it apart the chains, guides and tensioners were all finer I replaced them anyway as preventative maintenance. It did not cure the issue so I took it back apart and dug into the cam adjuster pistons thinking they must be stuck. That is when I found the metal screen stuck in the intake cam adjuster piston. Which, cured the issue,