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NO, not another broken timing belt-but close...
Changing the front seals on my 977na and found this...
  The timing belt is walking off the cam spocket and rubbing against cam housing cover. Is there a fix for this? Please Help.
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Armando Diaz 85 911 Carrera - Track car 01 996 Carrera - For Sale http://forums.pelicanparts.com/showthread.php?s=&threadid=327823&highlight=996 87 944na - Old Daily Driver, now 944 CUP 03 Chevy Avalanche- Support Vehicle 70 Olds 442 W30 Conv- Gone but not forgotten http://www.diazracing.com adiaz@diazracing.com Last edited by armandodiaz; 03-12-2005 at 06:16 AM.. |
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03-12-2005, 05:57 AM
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Check the belt tension pulley and it's supporting structure. Pulley could be loose. Support stud bent or pulling out of block/tensioner. Or if a spring loaded tensioner, the tensioner arm could be loose. The flange on the timing belt tensioning pulley always goes toward the block.
The water pump pulley/roller could be loose or if a rebuilt water pump not machined correctly. Always look at the pulley or roller before the trouble spot on toothed belts.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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03-12-2005, 01:04 PM
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I have found the lower screw that hold the rear cover to the cam housing missing. I also notice some play on the adjusting gear. It's also sound a little rough when I spin it. I'm going to replace these and take it from there.
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Armando Diaz 85 911 Carrera - Track car 01 996 Carrera - For Sale http://forums.pelicanparts.com/showthread.php?s=&threadid=327823&highlight=996 87 944na - Old Daily Driver, now 944 CUP 03 Chevy Avalanche- Support Vehicle 70 Olds 442 W30 Conv- Gone but not forgotten http://www.diazracing.com adiaz@diazracing.com |
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03-12-2005, 02:37 PM
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The "adjusting gear" is the tensioning pulley?
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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03-12-2005, 08:51 PM
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Yes the gear that is on the tensioner.
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Armando Diaz 85 911 Carrera - Track car 01 996 Carrera - For Sale http://forums.pelicanparts.com/showthread.php?s=&threadid=327823&highlight=996 87 944na - Old Daily Driver, now 944 CUP 03 Chevy Avalanche- Support Vehicle 70 Olds 442 W30 Conv- Gone but not forgotten http://www.diazracing.com adiaz@diazracing.com |
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03-13-2005, 03:46 AM
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It's not a gear. It's a pulley. Nomanclature is important. Take the headlight motor apart if you want to see a gear. Or the transmission.
Also the small smooth round idlers that just barely touch the belts or come close are called rollers.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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03-13-2005, 08:56 AM
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Join Date: Jun 2001
Location: MN
Posts: 604
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One other thing is if you have that spring tensioner for the timing belt and you haven't done the work on the car from day 1, those bolts can be stripped or near stripped from prior belt work. And the tensioner will then cause all sorts of problems. This is when helicoil is your friend.
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03-13-2005, 11:23 AM
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Same as what I'm thinking.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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03-13-2005, 05:46 PM
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Well I'm ready to replace the tensioner (gear
) and I took a close look at the old adjuster: Is this positioned correctly or is it backwards?
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Armando Diaz 85 911 Carrera - Track car 01 996 Carrera - For Sale http://forums.pelicanparts.com/showthread.php?s=&threadid=327823&highlight=996 87 944na - Old Daily Driver, now 944 CUP 03 Chevy Avalanche- Support Vehicle 70 Olds 442 W30 Conv- Gone but not forgotten http://www.diazracing.com adiaz@diazracing.com |
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03-16-2005, 03:22 PM
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Should be a washer under the bolt in the upper right. Kind of an elongated washer.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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03-16-2005, 06:26 PM
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1985 Porsche 911 3.2
1983 Porsche 944 2.5 liter
