Timing chain tensioners...

[JFP in PA]

Originally Posted by Starter986;601379out?

While they're "in there" is there anything in particular I should have them look at/test?

Cam deviation values.

[Seal1968]

Originally Posted by JFP in PA

Cam deviation values.

Do these values essentially tell you how far the chains have "stretched", or guides have worn causing a slight change in the factory parameters?

I use my VCDS for my Audi B 8.5 2.0 to monitor this very value, as they are known for a tensioner failure. Mine has the updated tensioner, however they only have so much adjustment available to offset chain stretch or guide wear before you need to replace the guides and chains. Audi calls it "adaptation" values.

I'm thinking this applies here too.

Thanks

[JFP in PA]

Originally Posted by Seal1968

Do these values essentially tell you how far the chains have "stretched", or guides have worn causing a slight change in the factory parameters?

I use my VCDS for my Audi B 8.5 2.0 to monitor this very value, as they are known for a tensioner failure. Mine has the updated tensioner, however they only have so much adjustment available to offset chain stretch or guide wear before you need to replace the guides and chains. Audi calls it "adaptation" values.

I'm thinking this applies here too.

Thanks

These cars have a deviation spec of +/- 6 degrees; values beyond that range indicate problems in the cam drive that need to be addressed.

[Seal1968]

Thanks kindly...similar numbers to Audi's "range" of adaptation.