Rb25Det Noise?

[BrOwnY GT]

Hey guys recently changed a timing belt (whole kit) thinking the noise was the belt which had to replaced regardless was original :S This noise seems to be accuring on idle anyone have a idea what else it could be ?

Appears to come and go aswell...

http://www.youtube.c...h?v=TAceG7N7qGU

Cheers in advance

Edited October 13, 2011 by BrOwnY GT

[Moodles2]

Maybe the CAS, put your hand on it to check

[BrOwnY GT]

Maybe the CAS, put your hand on it to check

How can you tell exactly it doesnt seem to be vibrating or anything but i did the old end of the screwdriver trick to listen in and does seem to be the loudest there? Could it just be in the wrong position or faulty its noticbly louder though since after installing the belt if that helps :S

[Moodles2]

If the CAS isn't put back on perfectly (flush and with the correct spacing), it will prematurely wear out the bearing inside the CAS ultra quick

[markdem]

take the cam covers off and spray things one-at-a-time with belt anti-squeak stuff. when the noise goes away after spraying it on a certain part, you found your problem

[89CAL]

My CAS had a dry(ish) bearing that was quite loud. Didnt realise thats what the noise was till I pulled the CAS off when checking everything over. It wasnt spinning smooth at all. Put a new CAS on and all good. Not sure if that will be your problem but not hard to check. Just mark where it was sitting before you take it off or re-check your timing when you put it back on

[SargeRX8]

Its the cam cover. Put pressure on the top driver side and it should go away. No idea how you fix it, alot of rb motors do it.

[Evil]

My car does the same thing... no idea what it is...

[SargeRX8]

If it sounds like this

Its the cam cover.

[gotRICE?]

If it sounds like this

Its the cam cover.

That sound isnt the cam cover. Its the idler/tensioner pulley.

I had the same noise and did a cambelt change and its been gone since.

[jjman]

Its the cam cover. Put pressure on the top driver side and it should go away. No idea how you fix it, alot of rb motors do it.

yep. mine is the same. took the cam cover off n noise went away...

Im having it put back on atm n asking the place to put it back on with some rubber washers to stop the noise as it seems to be harmonic as it only occurs at a certian rmp range (around idle)

will let you know if i find a fix...

[gotRICE?]

Wierd. Wish i'd tried that before doing all that work But then again, iv had my covers off countless times and havnt had the noise back. So maybe in my case it was the pulleys.

Nice work.

[BrOwnY GT]

Well i originaly thought it was the timing belt or bearing etc... but i had it recently replaced with a whole new gates racing belt kit which came with new Idler Bearing etc

which actually appears to have made the noise louder.

Can only hear it at idle, drove it the other day got back home had a listen nothing noise wasnt there.

Comes and goes it seems. But always comes after a min after a cold start and slowly gets louder.

Edited November 7, 2011 by BrOwnY GT

[jjman]

Well i originaly thought it was the timing belt or bearing etc... but i had it recently replaced with a whole new gates racing belt kit which came with new Idler Bearing etc

which actually appears to have made the noise louder.

Can only hear it at idle, drove it the other day got back home had a listen nothing noise wasnt there.

Comes and goes it seems. But always comes after a min after a cold start and slowly gets louder.

yep. this is also the same situation as me. was worse after changing all the necessary bits n also varies in how n when it will do it. But usually when it is cold is when i can hear mine...

Edited November 8, 2011 by jjman

[SargeRX8]

Its so embarrassing that it only happens on idle cos most of the time that is the only thing people will hear around you when on the lights.

Gates racing belt + aircon + idle is f**kING HORRIBLE. I switch my AC off because if that f**king sound.

[BrOwnY GT]

Yea mine makes the noise regardless of if i use the ac or not but im gonna replacing the harmonic balancer soon so ill have another closer look see if i can find the issue.

[SargeRX8]

The harmonic balancer isn't the issue(I hope you're not changing it for that). The noises come from 3 things; 1) The gates racing belt, especially when warm 2) Old bearings 3) The cam cover. I put brand new everything, bearings, belt, rubber grommets on the cam cover. I RARELY get the cam cover sound. Bearing noise is gone, timing belt(the whirr when the AC is on or the engine is warm) is still there. If I do the belt again, I will NEVER get a gates belt. Stock or Nismo.

[BrOwnY GT]

The harmonic balancer isn't the issue(I hope you're not changing it for that). The noises come from 3 things; 1) The gates racing belt, especially when warm 2) Old bearings 3) The cam cover. I put brand new everything, bearings, belt, rubber grommets on the cam cover. I RARELY get the cam cover sound. Bearing noise is gone, timing belt(the whirr when the AC is on or the engine is warm) is still there. If I do the belt again, I will NEVER get a gates belt. Stock or Nismo.

Yea i know it isnt the issue the rubber is starting to crack hince why im changing it, I rarely hear a noise when its warm or gone for a drive its when i start it up and a min later it occurs and sometimes when ever.

Bearings were replaced so only option could be the cam cover possibly but ill check again when i do the balancer. I also agree allot people have been hating the gates belt for the common noise etc I'll probably do the same thing.

[SargeRX8]

There's rubber in the harmonic balancer? Fairly sure its all metal...

[Hanaldo]

There's rubber in the harmonic balancer? Fairly sure its all metal...

I don't think you understand how a harmonic balancer works?