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| Upper balance shaft sprocket? https://forums.tipec.net/viewtopic.php?f=25&t=10926 |
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| Author: | Dave MGT [ Tue May 03, 2011 11:17 pm ] |
| Post subject: | Upper balance shaft sprocket? |
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? |
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| Author: | tr7v8 [ Wed May 04, 2011 11:01 am ] |
| Post subject: | Re: Upper balance shaft sprocket? |
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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| Author: | Dave MGT [ Wed May 04, 2011 5:33 pm ] |
| Post subject: | Re: Upper balance shaft sprocket? |
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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| Author: | 951jamie [ Thu May 05, 2011 12:55 pm ] |
| Post subject: | Re: Upper balance shaft sprocket? |
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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