Cambelt noise

[Error404]

I did my crank seal and changed the crank sprocket on my 20v today, refitted everything.. seems to be running fine, smoother than before and idling very solidly - also replaced the alternator , alternator bracket and snub mount, all of which were cracked and about the fail.

There is more noise coming from the cambelt than before, not a 'scary' noise, but a more pronounced 'whiring' sound - is this normal with a new cambelt, or possible it just needs to bed in a bit?

All belts are tightened correctly, about 10mm of flex in the drive belts, and just able to turn the cambelt 90deg between finger and thumb...

Any thoughts?

[ericd]

You thought about fitting some new belts ?

[Error404]

yeah sorry, all new belts on when i did the job

[spink]

Only sound ive ever had is when i over tightened one,on a mk1 astra.

[pixsaudisex2]

yeah if you over tighten you get a wirrring noise of the belt swounds like a super charger..

you did replace the tensioner on the belt as these wear and make a noise even if you tighten them up correctly..

[4WheelDrifter]

just able to turn the cambelt 90deg between finger and thumb...

Any thoughts?

Sounds like the cambelt is too tight. I made this mistake once. I think Audi mechanics must be a bit weedy. Put your fingers on a lower torque setting.

[Error404]

lol - ok thanks 4wheel

any danger in the mean time? Probably be a few days till i can get in there to re-tension it...

yeah if you over tighten you get a wirrring noise of the belt swounds like a super charger..

yeah thats exactly what it sounds like.. quite like it actually

Tensioner was pretty new looking and very solid - no play and bearings very smooth.. i left it as is

[s2driveruk]

only other thing it could be is the cam belt cover could be too tight and rubbing the side of the belt.....

[Error404]

i had a good look to see if there was any rubbing - everything looks to have good clearance, pretty sure its just a bit too tight - does sound just like a supercharger.... i'll slacken it off a tad and see how it goes.... for now really want to make sure its safe to drive as i've got to get to work for a week before i've got time to fiddle with it - about 100 miles or so in all... any thoughts?

[s2driveruk]

should be able to slacken the water pump off a tad quite easily i think?

[Error404]

not too hard, but means taking the grill out, removing the aux rad, moving the PAS pump and taking off the cambelt cover - a good hours work in all.... doubt i'll be home before dark for a few days though... poo.. hope i don;t have to get the fecking Peasant Wagon (bus)

[RoadKill]

it the water pump , when i got the s2 i was told the cam belt was done so i had i look and it was but not the water pump so it started to drip, so new water pump and i had a charger sound lol backed it off till it stoped
( it tensions on the water pump )

[Error404]

yeah i changed the water pump a few weeks ago, didn't ahve this issue then :d'oh:

Have to try and do it after work tomorrow

[mcandmar]

Yep too tight, sounds like somebody strangling a chicken!

[Laurel]

Cambelts - The only part of a car I know about quite well. The Whirring noise you mentioned shouldn't be a problem. I'm pretty sure that's common when you've newly replaced a few things.

What you don't want to hear is a slight "pop". Which is what happened 1 mile away from the Ferry in Dover. (was going to France) the Cambelt had snapped and the car was officially dead. ('course, that was a volvo estate, not an S2)