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Senior Member
Join Date: Apr 2002
Location: NY
Posts: 1,368
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Wobbling crank pully???
I am at the track right now and I just noticed the crank pully on my '85 Carrera is wobbling. As a result there is now a slight oil leak in the nose seal. I checked to see if the pully was loose by prying against various leverage surfaces back there like the engine mount but it appears firm. Yet there is a wobble. In fact the pully lightly touches the fan housing at one point. What would all of a sudden case a wobbling pully? Can it be a bent crank? If so what would cause that? I did not overrev. Do these pullys ever loose their shape and deform? Any ideas to diagnose? As of right now I am not going to run at high RPM until I have a better clue about this problem.
Thanks! |
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07-11-2002, 07:10 PM
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Registered
Join Date: Aug 1999
Location: Denver, NC
Posts: 1,391
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It is really hard to bend a crank and you would feel vibration in the motor. I would think the hold down bolt is loose causing the pulley to go off center. Be careful you do not want to loose the fan belt an overheat the motor.
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07-12-2002, 07:59 AM
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Registered
Join Date: Nov 2001
Location: a few miles east of USA
Posts: 3,393
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john
don't run it until its sorted (imho). you may do more damage. is the bolt tight? i doubt the crank is bent.
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Rich  '86 coupe "there you are" |
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07-12-2002, 08:11 AM
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Registered
Join Date: May 2001
Location: North Port, FL
Posts: 342
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I had a problem where the bolt came loose and I tried to tighten it with a wrench. Didn't work. If you have the duralock bolt it needs to be torked (sp?) to 125 ft/lbs. That is the one that I had on my '84. You will have to remove the engine mount to get in there to replace the nose seal (easy job once you get to it). Just make sure to use a lot of noseaze (sp again?) when you put it back togeather (except on the crank pulley bolt).
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Ted Stringer nuke3@juno.com '84 911 Targa aka pocketrocket RIP Working on: '80 VW Dasher Diesel w/1.6 '96 Ford F250HD Diesel 4X4 |
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07-12-2002, 08:45 AM
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Senior Member
Join Date: Apr 2002
Location: NY
Posts: 1,368
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Thanks for the help guys. It turns out it was a loosened bolt. Unfortunately the pully was banging around on the crank and the pin on the crank really beat up the mating surface on the pully. Luckily the crank and pin are very hard and the pully is soft so all the damage was on the pully. So since the pully is fried I could not get the wobble out completely. I'll need a new pully.
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07-12-2002, 04:19 PM
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Cymru am Byth
Join Date: Apr 2002
Location: Salem, Oregon.
Posts: 571
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This same thing happened to me about 2 weeks ago, mangled the pulley and slightly scored the crank. No real damage done luckily.
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1986 930 (Gone but not forgotten) 1995 993 (Should Never Have Sold it) 2007 BMW 328Xi Sport Wagon 2005 Lexus GX470 Offroader Julian Williams |
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07-12-2002, 04:25 PM
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