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i dodged another bullet
so i noticed an unusual amount of belt dust, rough idling/running, and a whining noise from the belt area;
 diagram of belts;  open up the belt cover and both the timing and balance belts are worn in an unusual manner;  apparantly, one of the inside cover screws had gotten loose and after travelling around the belt system, ended up lodged by the upper balance shaft sprocket. also note that all of the teeth on the backside of the belt have been shaved smooth!  so now i have a custom one-of-a-kind screw-slot; 
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!) |
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03-04-2007, 12:06 PM
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Registered
Join Date: Jul 2001
Location: Edmonton, Alberta, Canada
Posts: 4,530
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Holy ****.
Another plus for not having my front covers on.
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Alex - PCA Polar Region - Boxster Muncher 86' 944 Turbo - Megasquirt - 326 rwhp/340lbft @ 18 psi SOLD www.edmontonhomelife.com www.edmontonrealestate.ws |
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03-04-2007, 02:42 PM
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Registered
Join Date: Oct 2006
Location: Laguna Vista
Posts: 2,203
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I have a question. I have been told by Porsche mechanics that the 944 na is an interference engine due to its higher compression, but the 951 has lower compression and the piston tops are concave so a belt failure would not damage valves/rods etc. In other words a belt failure in a 951 is not catastrophic. True / false
Sox
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"Little problems always come back and bring bigger friends with them". 1986 951"MADDOG" black Dual port WG, 4 port control valve with EBC |
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03-04-2007, 03:02 PM
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Registered
Join Date: Jul 2001
Location: Edmonton, Alberta, Canada
Posts: 4,530
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Quote:
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Alex - PCA Polar Region - Boxster Muncher 86' 944 Turbo - Megasquirt - 326 rwhp/340lbft @ 18 psi SOLD www.edmontonhomelife.com www.edmontonrealestate.ws |
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03-04-2007, 08:26 PM
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Registered
Join Date: Oct 2006
Location: Laguna Vista
Posts: 2,203
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thanks...not that I was going to test this theory.
Sox
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"Little problems always come back and bring bigger friends with them". 1986 951"MADDOG" black Dual port WG, 4 port control valve with EBC |
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03-04-2007, 08:30 PM
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,031
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The 944 motor, for arguments sake, is basically half of a 928 motor. (in general terms).....
I am the only person I can find that broke a timing belt in a 928s4 (32v) motor and did not have the pistons hit the valves. 190 compression on all cylinders after it broke. It might have beed because it let go when I turned the motor off, but I would like to know if anyone else has survived the incedent? So, you *might* survive a broken timing belt, but the odds are you will be openning your wallet and seeing your banker! Cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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03-04-2007, 09:30 PM
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winter-hater club member
Join Date: Oct 2003
Location: salt lake city, utah
Posts: 24,705
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sheesh... that was a close call.
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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03-05-2007, 07:20 AM
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