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915 clutch mystery
Just put new clutch kit in my 915 with new release bearing. I have done many times before. The problem im having is when i put in the clutch to put into gear it slows down my motor rpm to a stall. has any one had this problem. I dont have any problem with motor running at idle or when I rev it up. only when I push clutch pedal to floor. HELP!
Last edited by JOHN21BLACK; 04-30-2015 at 08:01 PM.. |
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04-30-2015, 07:50 PM
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Try not, Do or Do not
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Some times the clutch cable can get caught over the throttle linkage inside the tunnel and depressing the pedal moves the throttle rod or bell crank.
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Henry Schmidt SUPERTEC PERFORMANCE Ph: 760-728-3062 Email: supertec1@earthlink.net |
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05-01-2015, 06:54 AM
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Registered
Join Date: May 2004
Location: Boulder, Colorado
Posts: 7,275
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Could also interfere with the bell crank on the tranny, perhaps, depending on routing.
The bell crank up front can be bent if you don't have a good throttle stop, and if the clutch arm interfered it would push the throttle forward, causing the slow down. Though you should still be able to idle with the throttle butterfly full closed, same as with carbs. |
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05-01-2015, 12:38 PM
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Talked to a few mechanics and its one of two things. bad bearing or disc in backwards. going to have to pull it apart again. Keep you guys posted. thx
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05-02-2015, 04:45 PM
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just looked with camera again and disc is facing forward. i could tell by the rivits
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05-02-2015, 05:56 PM
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re-adjusted clutch. goes into gear now, but if i push to floor still makes a grinding noise. here is a pic of bearing on guide tube. also some pics of motor.
   
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05-06-2015, 03:28 PM
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Join Date: May 2004
Location: Boulder, Colorado
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Where did you take the picture from?
Best opening I think would be to remove the starter. Is transmission to left in picture? Does the scope photo show the shift fork engaged in the slot in the TOB? I'd think that the fingers of the diaphragm spring would show up on the right. One could persuade himself that fingers appear top right, but not in alignment with the TOB. Grinding when depressing clutch to max seems odd, as you are pulling the TOB toward the tranny end of the guide tube. Nothing to grind much there, even if you way overstroke it. At least as long as the TOB outer spins easily on the inner. Why not adjust things so that you can't depress the clutch so far that it makes noises? It needs to be loose when engaged, and when depressed it only needs to come forward (the TOB) enough to get the disk free of its two sides. No need to depress much more than that. Maybe you've done all that. |
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05-06-2015, 09:30 PM
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,520
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Do you have the limiter on the pedal board. If you press the clutch to the floor and not having the limiter you get the throw out bearing to over pull the clutch.
Bruce |
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05-07-2015, 02:26 AM
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#147 of 2096
Join Date: Jul 2002
Location: Puerto Rico
Posts: 1,701
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I had that condition not on a 911. It was the lateral bearing inside the engine. When you pressed the clutch the crankshaft moved.
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#147 of 2096 |
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05-08-2015, 06:34 PM
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I figured it out. it was because i didnt have pedal board in. I re-adjusted clutch cable and now it shifts fine. no more noise or grinding. Thanks for all the info
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05-13-2015, 03:41 PM
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Porsche
Retor 911
Scarab
Riley
