AUDI A6 C6 2.0 TDIe - TENSIONER STUD TO CHANGE OR NOT?

[Novica]

Hello,

In near future I have intention to change Timing belt and all other things with it on my new A6 2.0 tdie (with 175000km on it, engine code CAGB). I noticed that in some kits include tensioner stud. Do I need to replace it or not?

I have never changed on my A4 (1.9 TDI 96kw AVF engine, 2004), timing belt was changed 2 times and stud remained same (car had 260000km on it when I sold).

Nice to hear your opinions and experience?

Novak

[B5NUT]

I've head of these failing over time, so I would change it. Stick "tensioner stud failed" in Google and you will see why it should be changed.

[Novica]

Already two days I am passing over net, and I read plenty threads in different forums (skoda,vw, etc) about PD engines which suffered snapping of this stud. Mostly happened after changing of timing belt.


There are reasons to change it and not to change. In begging (and I know, because I had PD engine) the timing belt kits did not include this stud but now some kits include and some not. I am not sure if original kit include it or not. Does dealer change it or not. Someone is telling that old stud can be reused if tension pulley is not overtighted after fitting it, especially if it is first time changing the belt. The other problem rise if you change the stud, you must proper tight it if it is loose or overtighted then you will get problem very soon.

What to do?

[dan2485]

If you get the bolt in the kit replace it unless you have a calibrated torque tester to check the torque wrench.

Your average torque wrench is normally out when set even if the wrench is calibrated every year.

Most professionals who use torque wrenches for accurate settings will check/setup the torque using a tester.

this would be a professional bit of kit

http://www.norbar.com/en-us/products...d/273/id/10970

[dan2485]

use lociite 222 to fix the stud to the cylinder head.

[Novica]

Thanks Dan,

To be honest, I use same torque wrench for last 10 years and I have never checked it. I am using it for wheels and for changing timing belt once on my ex passat, 2 times on my ex Audi A4 and I have intention to use now on my A6. But, all these stories about failure of timing belt are moving me away from this job. Anyhow, there is still time to make right decision.

I will keep gathering information about right procedure and see what is best to do.

Cheers