Cam Belt too big???

[mcandmar]

That idler pulley dont look right, NEVER seen a plastic one before so i bet its off something else / different size.

[AndyP]

That idler pulley dont look right, NEVER seen a plastic one before so i bet its off something else / different size.

Here is a pic of my 3B set up, this is a genuine idler from Audi



Looks to be a similar size to the water pump sproket, your's looks smaller? I'll have a look around in a bit and see if I have an old one I can measure.

[quicktrick]

THx

[quicktrick]

That must be it then the idler is wrong part because the 147 teeth belt can not tension enough. Now well get somewhere! Thx again for the information as I stay in a small town where there ain't an Audi dealership that I can get information from. As I have send the S2 for an oil leak repair and it spiraled out to this headache for a week now trying to find info. Thanks again.

[AndyP]

Cam belt idler on a 3B is 75mm dia.

[quicktrick]

Thank you once again for the info. The S2 is fixed and going like a S2 should. Dont know how and why it had the wrong Idler and belt, but all is back to original and running.

[rs200]

this thread give me all answers what I want to know..
my timing belt on 3B have 147 teeth , but it seems that 1 is too much.. so I taught that belt must have 146.. I fix that with adjustible cam pulley
but now I know where could be a problem.. IDLER.. hmm must go and take a look..
will post you later .. thanks guys !

[rs200]

well ETKA said the idler must be 74mm and belt 147 teeth, same as 3b,nm,7a,1b,mc,

i messured today my idler and i have 74mm , where is than problem with my engine?

[nip]

Just to confirm, my original belt has 152 teeth the cambelt kit i bought the belt seems to be shorter it only has 146 or 147 teeth will this be ok to use?

[mcandmar]

Nope, sounds like your kit is for a 7A/3B.

As for QuickTricks issue, i recently discovered the plastic idler pulley is actually for the 2.6/2.8 V6 engine.

[nip]

Nope, sounds like your kit is for a 7A/3B.

As for QuickTricks issue, i recently discovered the plastic idler pulley is actually for the 2.6/2.8 V6 engine.

mine sounds like that heres a pic

[AndyP]

I don't think that kit is for an S2, you have too many idler pulleys and the tensioner looks wrong.

[nip]

I don't think that kit is for an S2, you have too many idler pulleys and the tensioner looks wrong.

Ok cheers Andy,
Does anyone know what this kit is off

[mcandmar]

Thats all wrong, i would lay money its a 2.8 v6 kit.

[nip]

Thats all wrong, i would lay money its a 2.8 v6 kit.

Cheers mate