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 Post subject: Upper balance shaft sprocket?
PostPosted: Tue May 03, 2011 11:17 pm 
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Joined: Sat Nov 20, 2010 11:59 pm
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Just getting my 944 turbo (220) on the road. Im new to the Porsche scene so been reading up lots on the 944.
When it warms up theres a bearing noise that I first thought was the waterpump. But after looking at it yesterday, when I put a screwdriver behind the upper balanceshaft sprocket it sounds like its coming from there......?
My question, is the top sprocket a roller bearing which could be causing this noise?


Last edited by Dave MGT on Wed May 04, 2011 5:34 pm, edited 1 time in total.

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 Post subject: Re: Upper balance shaft sprocket?
PostPosted: Wed May 04, 2011 11:01 am 
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NOpe sprocket is just a pulley on a shaft. I suspect one of the idlers or tensioners is starting to go. Needs belts whipped off & a check, although you can check some by slackening & moving away from the belt. When did it last have a water pump?

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 Post subject: Re: Upper balance shaft sprocket?
PostPosted: Wed May 04, 2011 5:33 pm 
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tr7v8 wrote:
NOpe sprocket is just a pulley on a shaft. I suspect one of the idlers or tensioners is starting to go. Needs belts whipped off & a check, although you can check some by slackening & moving away from the belt. When did it last have a water pump?


Ahh, thanks Jim.

It been off the road since 08 because it was a written off. Not sure with the waterpump, will look through the service history. can believe how much they are!!!


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 Post subject: Re: Upper balance shaft sprocket?
PostPosted: Thu May 05, 2011 12:55 pm 
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Have to agree with Jim. The balance shaft rides on bearinf shell also. Very rarely do they go bad but if it has been sitting up for a while it is possible.

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