broken chain tensioner guide

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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2014audis8
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broken chain tensioner guide

Post by 2014audis8 » Sat May 24, 2025 4:08 am

So I broke my valve tensioner guide. Chain still seems to be tight around the tensioner and gears.
What are the chances that it jumped timing? Is it like 100% if the guide breaks the chain jumps?

Also has anyone had luck just replacing the guide itself and not the whole tensioner?

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Shoppinit
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Re: broken chain tensioner guide

Post by Shoppinit » Sat May 24, 2025 9:44 am

I doubt it would have skipped a link.

Some useful info here:
Mɐʇʇ wrote:
Thu Feb 13, 2025 4:17 pm
This is the correct part, as fitted to my old RS6:
https://www.autodoc.co.uk/vaico/12246760

And I think this is the other side:
https://www.autodoc.co.uk/vaico/12246761

This was the thread I did on them: viewtopic.php?f=2&t=133688&p=974425
I also replaced the shoes on the adjuster I didn't replace and all worked well. I didn't like the blauparts adjusters, I used the ones Nobby has also used. Can't remember why I didn't like the blauparts ones, now.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Shoppinit
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Joined: Wed Dec 31, 2008 6:24 pm

Re: broken chain tensioner guide

Post by Shoppinit » Sat May 24, 2025 9:50 am

Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

2014audis8
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Joined: Sun May 11, 2025 3:09 am

Re: broken chain tensioner guide

Post by 2014audis8 » Tue Jun 24, 2025 1:45 pm

so I originally took off the wrong side (bank 1), put that all back on then worked on bank 2, got the chain tensioner replaced and everything put back together.
Now Bank 1 valve cover is leaking. I took it off again, double checked everything was cleaned, put back in and torqued down properly and it is still leaking.
I replaced the PCV and it didnt help.

Has anyone else had a lot of trouble getting the valve cover to stop leaking? I am assuming the gasket is just not seated correctly but it is a huge pain to get off and on in the engine bay.
Just wondering if anyone else had issues with cover leakage and what ended up being the problem?

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