Hi all im in need of some help to determine what is causing this sound from the front of the engine. It can hardley be heard at idle its just when the car is revved at higher RPM it squeals.

 

The engine had a full 120k service 4years ago including oil pump, water pump, belts, idlers, tensioner and rebuilt alternator.

The engine had then not been used so all the parts are still brand new.

 

We started the car recently and we got this squeal from the front of the engine that was diagnosed as the cambelt being to tight or the tensioner being faulty or seized causing the belt to be tight. So a new cam belt and tensioner was fitted all genuine Nissan again. As soon as the engine was started the noise was still present.

We have since replaced the cam pulleys to uprated BDE pulleys and changed the CAS unit as the one on the engine had shaft play and a noisey bearings.

 

Still no joy!

 

Last night we removed the auxiliary belts to elimate the bearings in the water pump, power steering, air con and alternator and it's still present!

 

The sound seems to be coming from around the CAS unit area but doesn't seem to be internal of the engine.

The only parts that haven't been changed again are the idlers below the CAS and between the cam gears.

 

Has anyone else experienced this before?

 

Here is a clip of the noise....

 

 

Thanks Dan

Sounds like the bottom pully is rubbing on the metal belt cover Dan or could be an inlet pully going bad

Exactly what has been mentioned before Znut. I put a thread up a while ago asking about if a key way is needed to hold the spacer in place as we thought the same thing.

I agree sounds like rubbing metal.............

I know it sounds stupid but you did install it on the right way round? Otherwise it will be rubbing against the belt rather then holding it on. No key needed for that flange.

Also if the lower metal cover was damaged (easily done while trying to remove front pulley ) it can rub, very noticeable once off as it will be polished up in that spot.

Jack the car up and (carefully) get under the front while its running...i had the exact same issue and a little bend out with a screwdriver cured it.It runs very very close to the cover at the best of times.

 

btw Dan did the CAS arrive today?:)

Edited September 13, 201312 yr by znut

Ill give that ago tomorrow. See if its close to anything.

 

Yes bud it arrived today but I wasnt in so ill be off the the post office in the morning :)