timing tensioner mount failure

aviator97 · **Joined:** Tue Apr 13, 2021 5:50 pm **Posts:** 4

So I just did a full top end with a new head and turbo along with the usual stuff. the timing belt tensioner bolt hole stripped out causing a timing belt failure. Hopefully the rockers did their job. I will soon pull it apart, but the question is has anybody else had his problem and where can I locate a new timing cover backplate? Anybody have one they want to sell?

WWDiesel · **Posted:** Fri Aug 09, 2024 12:16 am

You are not the first, others have reported stripping out the tensioner bolt as well.
The fix is to get a metric HeliCoil Kit, tap it out with the correct size HeliCoil tap that comes in the kit and install a HeliCoil thread repair.
HeliCoils are much stronger than the original aluminum threads.

If it already had a HeliCoil installed and the the bolt was over torqued and pulled the HeliCoil out, then your only option is to get an oversize thread insert like a timesert (Model Number: 1812) and install it in the cam belt back cover. They are not cheap, but will work in extreme cases.

Other option is to locate a good used cam belt backing cover that is not stripped. Timing Case. OEM Part Number: 05159211AB :google:

Tensioner Bolt PN: OEM Number: 5015031AB
DO NOT OVER TORQUE: (Torque Spec: 22 ft/lbs)

timing tensioner mount failure

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