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Registered
Join Date: May 2002
Location: Tioga Co.
Posts: 5,942
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camshaft extension
I've diagnosed my top end noise. The camshaft extension which the rotor is attached to is loose. This is why it runs rough (my timing is not consistent as the rotor has lots of play now) and the rotor hitting the distributor cap is my noise. The rotor isn't loose, the large bolt-like extension is what has the play. Can this be tightened?
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'86na, 5-spd, turbo front brakes, bad paint, poor turbo nose bolt-on, early sunroof switch set-up that doesn't work. Malo periculosam, libertatem quam quietam servitutem. |
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10-15-2008, 05:27 PM
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Greasy Member
Join Date: Mar 2006
Location: Indiana
Posts: 1,457
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The part you are referring to is held in place by the cam bolt. There is a small insert extension that slides inside the large "nut looking" portion and is held in place by a small bolt.
   My concern would be that the drive extension is "wobbling". That is a snug fit over the end of the cam shaft, so either the end of the cam is worn, or the drive extension has spread open! Either way, it sounds like the cam bolt worked it's way loose somehow. Here's a link to my website that should give you a little more insight on how it's assembled: http://www.benms.com/944camseals.html Hope it helps! -Nick
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Owner: Bennington Motorsports www.benms.com Sponsor for Midwest Region 944-SPEC racing series -When was your timing belt changed or tensioned?? -Yes, I'm the crazy man that will loan out my 9201. Just PM me, I will add you to the list and get it out ASAP. |
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10-15-2008, 06:28 PM
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Registered
Join Date: May 2002
Location: Tioga Co.
Posts: 5,942
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Your response, pictures and link are of tremendous help. Thanks very much. If there isn't any physical damamge I assume I can itghten things back up and run it (I am planning on belts, rollers, seals and water pump this winter, so that will get an even closer look then if I go that route). If there is damage/wear, new camshaft?
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'86na, 5-spd, turbo front brakes, bad paint, poor turbo nose bolt-on, early sunroof switch set-up that doesn't work. Malo periculosam, libertatem quam quietam servitutem. |
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10-16-2008, 04:58 AM
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Greasy Member
Join Date: Mar 2006
Location: Indiana
Posts: 1,457
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If it is temporary, I imagine you could get away with it until you do the front end. Usually anytime the cam bolt is removed, it needs to be replaced as it stretches when it is torqued down. If there is any damage to any of the components, drop a line to TNT25169, 944 ecology, or plyhammer they are always parting out cars and can probably help.
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Owner: Bennington Motorsports www.benms.com Sponsor for Midwest Region 944-SPEC racing series -When was your timing belt changed or tensioned?? -Yes, I'm the crazy man that will loan out my 9201. Just PM me, I will add you to the list and get it out ASAP. |
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10-16-2008, 05:11 AM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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Many944s,
Thanks for the writeup. I looked at www.benms.com and saw additional information. The lifter section in online technical information, helps a lot. John_AZ 1988 924S + 1987 924S |
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10-16-2008, 05:41 AM
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Just thinking out loud
Join Date: Nov 2001
Location: Close by
Posts: 6,884
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I had the same exact symptoms you are experiencing, and when I took the cover off of the front of the housing, everything forward of the cam gear fell in my hands right off the end of the camshaft. The bolt had broken, the cam gear had wobbled around, chewed up the cam gear key way, the key, and rounded out the key way on the camshaft. The only thing I can account for not having a serious problem, was having just enough of the key left to keep time. $125 later and I was back on the road. I bought a used, complete cam tower. I reused my lifters. You might be able to get away with installing a new bolt, I wasn't so lucky. Inspect the parts.
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83 944 91 FJ80 84 Ram Charger (now gone) |
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10-16-2008, 06:46 AM
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Registered
Join Date: May 2002
Location: Tioga Co.
Posts: 5,942
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Back on the road in very limited duty prior to some significant downtime for preventative maintenance this winter. Thanks once again to the BBS for very prompt and accurate responses to my problems.
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'86na, 5-spd, turbo front brakes, bad paint, poor turbo nose bolt-on, early sunroof switch set-up that doesn't work. Malo periculosam, libertatem quam quietam servitutem. |
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10-17-2008, 04:21 AM
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