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-   -   Funny noise from crank pully/timing cover (http://legacygt.com/forums/showthread.php?t=194179)

OutbackXT05 10-04-2012 07:17 PM

Funny noise from crank pully/timing cover
 
Well this just recently started about a week ago and its steadily getting louder. When my car is cold I have a fairly loud grindy bad idler/bearing kind of noise comming from my center timing cover/crank pulley. Its only when the car is cold and 100% goes away when its warmed up. The car was recently torn apart by a shop for my shortblock. The crank pulley looks like it has a very little wobble to it just barely and the bolt is tight so I dont think its because the pulley is loose. Any ideas? It doesnt make much sence that it completely dissapears when its warm.

OutbackXT05 10-06-2012 02:29 AM

Anyone have any ideas or previous expiriences? Or should I just start tearing it apart?

06silvarubiLGT 10-06-2012 08:06 AM

Sounds like something oil related behind the timing cover, when the oil is cold and thick its noisey, when the oil is warm and thinner noise goes away.. is the pulley seperating? Maybe oil pump, that right behind the pulley? Id pull the belts and cover and then stethoscope it

xt2005bonbon 10-08-2012 06:30 PM

When you rebuilt your engine, did you put brand new timing belt pulleys as well as a new TB tensioner? I am asking just to rule those out.

fyi,

If you've put brand new pulleys, then I would next check very carefully the crankshaft pulley. As 06silvarubiLGT said, they have a tendency to seperate with times and make a REAL mess. For peace of mind, I'd install an LCP.

Time for a video.

OutbackXT05 10-08-2012 08:59 PM

I checked the crank pulley and she is tight. The T-belt was replaced but the pulleys are still the oem 88k mile ones.

Max Capacity 10-09-2012 04:49 AM

I thinking you need to get to the idler pulleys...

xt2005bonbon 10-09-2012 05:21 AM

Quote:

Originally Posted by OutbackXT05 (Post 4106286)
I checked the crank pulley and she is tight. The T-belt was replaced but the pulleys are still the oem 88k mile ones.

The major problem with that crank pulley is that it can begin to fail by 'splitting' in two and making a major mess. Look up on youtube for wobbling crank pulleys on subies.


Quote:

Originally Posted by Max Capacity (Post 4106606)
I thinking you need to get to the idler pulleys...

^Yep. That could be that small idler pulley slowly dying. You'll only be able to tell by checking it though.

All of this is speculation though. Post a video of the noise. We may be able to help you better with this issue.

OutbackXT05 10-09-2012 08:33 AM

Alrighty ill see what i can do.

OutbackXT05 10-09-2012 09:56 AM

The wierdest part is when its warm it goes 100% away.

xt2005bonbon 10-09-2012 09:59 AM

Quote:

Originally Posted by OutbackXT05 (Post 4106859)
The wierdest part is when its warm it goes 100% away.

Dude, :needpics: substitute 'pics' for 'vids'. It's like you're teasing me already!

OutbackXT05 10-09-2012 02:41 PM

Ya ill see what i can do later today

OutbackXT05 10-09-2012 07:57 PM

http://www.youtube.com/watch?v=CfHUa...ature=youtu.be

OutbackXT05 10-09-2012 08:05 PM

Ok i got all the noises weeded out. And i checked the belt again after i started it and its tight now. I guess it just stopped where there was some slack because i know our cars have auto adjustable tensioner. So i guess the last quest is those guides that are eating the belt.

HAMMER DOWN 10-09-2012 09:05 PM

Check and adjust the clearance between timing belt and timing belt guides. There is 5 guides, one for each cam gear & one for the crank. Clearance should be 1.0mm +\- 0.5mm (0.039" +\-0.020")

Mike

OutbackXT05 10-09-2012 09:07 PM

Alrighty got it all back together with the clearances. Shes quiet again. Gonna wait till tomarrow morning to see if the exhaust leak is fixxed. Thanks.


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