why is the timing belt tracking to the left?

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larry
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why is the timing belt tracking to the left?

Post by larry »

greetings, changed the timing belt on bby engine , main belt is tracking to the left of cam.


https://www.youtube.com/watch?v=eX1t6doWxjw


Image

Image


did i incorrectly install the tensioner ?
littlepolo
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Re: why is the timing belt tracking to the left?

Post by littlepolo »

Did the engine run after install? It will be held within track of the pulley guide/limits. Did you replace studs? It seems something is out of line, cross threaded/bent? I'd back track and refit.
RUM4MO
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Re: why is the timing belt tracking to the left?

Post by RUM4MO »

I'm sure that this has been discussed in the past either here or the Skoda or SEAT motoring forums, so I'd think that it is normal and probably due to either sharing components with other engines or a design error/limitation, I certainly noticed that on my wife's previous car a 2002 BBY engined Polo after it got its belts etc replaced twice.

Edit:- it looks like you have used a Dayco main timing belt as I can see the PTFE coated inner surface - something else that has been discussed on these VW Group forums, ie "why/what is Dayco belts got on their inner running surface?" I think that VW Group use Dayco for these belts in the service packs.
littlepolo
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Re: why is the timing belt tracking to the left?

Post by littlepolo »

I always buy the Gates kit (incl w/p) and have never had a problem.
larry
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Re: why is the timing belt tracking to the left?

Post by larry »

Here is the engine running

https://www.youtube.com/watch?v=eX1t6doWxjw

i am beginning to think that it could be the belts. why would the smaller belt track to the left ? both belts are tracking to the the left . all components used are dayco.
larry
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Re: why is the timing belt tracking to the left?

Post by larry »

Did you replace studs? It seems something is out of line, cross threaded/bent? I'd back track and refit.
yes, brand new studs .
larry
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Re: why is the timing belt tracking to the left?

Post by larry »

RUM4MO wrote: Sun Sep 26, 2021 12:02 pm I'm sure that this has been discussed in the past either here or the Skoda or SEAT motoring forums, so I'd think that it is normal and probably due to either sharing components with other engines or a design error/limitation, I certainly noticed that on my wife's previous car a 2002 BBY engined Polo after it got its belts etc replaced twice.

Edit:- it looks like you have used a Dayco main timing belt as I can see the PTFE coated inner surface - something else that has been discussed on these VW Group forums, ie "why/what is Dayco belts got on their inner running surface?" I think that VW Group use Dayco for these belts in the service packs.


Image

did it track to the left more than this ?
RUM4MO
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Re: why is the timing belt tracking to the left?

Post by RUM4MO »

Sorry I'd be lying if I said either way, that car was traded in in August 2015, so I've forgotten - but my initial concern was for the way the main belt did run over to one side on the toothed pulley.
Euler2
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Re: why is the timing belt tracking to the left?

Post by Euler2 »

On looking at the first photo, is it just me or does it look like the tensioner retaining arm is not seated properly below the flange bolt as it seems to sit on the bolt instead of sitting below the flange bolt.
Is that the way it is supposed to be ?
littlepolo
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Re: why is the timing belt tracking to the left?

Post by littlepolo »

That is how it is supposed to be. It is just an index/position marker for the assembly.
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