I have had every major TReg ailment and managed to fix them all myself, but this one is the straw that broke the camels back. If that fails then I will drive it till it goes bang and tourch it. I will try a flush and a new hydraulic tensioner. This is a well documented production fault, but you have to dig it up.īad news is 12 months later, noise is back! They must have done a dodgy job. I gave it to VAG garage, cost me 3500 USD. Engine out, or at least lifted and work on the top! Not easy. Fix = replace both gears, timing chains and chain riders. Once warm tensioner system catches up and runs normal. Once this reaches beyond the capabilities of the tensioner system then cold operations mean noise and engine DTC. Result left gear wears much faster than right, leading to misalignment between cams. Much research shows left bank cam tensioner gear was not heat treated to spec on production.
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