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Registered
Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,804
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Flywheel Resurfacing
Well I have the engine out for some maintenance, I have decided to replace the clutch.
I will need to get the flywheel resurfaced and I'm wondering if there is anything special that I need to know or can I just bring it to any machine shop & they will know what to do. Any advice would be appreciated..........................Vern |
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02-11-2004, 05:26 PM
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Join Date: Feb 2001
Location: Aircooled Heaven
Posts: 1,054
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just ensure that they cut BOTH steps of the flywheel. The lower surface where the disc rids, as wel as the surface where the pressure plate seats. If not the clutch can slip.
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Jake Raby Owner, Raby's Aircooled Technology www.aircooledtechnology.com www.massivetype4.com |
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02-11-2004, 06:14 PM
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Banned
Join Date: Feb 2003
Posts: 1,207
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I think that after you have the flywheel machined you will have to place a shim between the throw-out arm and the pivot point on the tranny case to maintain the right geometry.
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02-11-2004, 06:44 PM
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Join Date: Dec 2003
Location: Milky Way Galaxy - 3rd Stone
Posts: 871
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If they have to cut that much to require a shim, get another flywheel.
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Ron Meier Backyard Shadetree Mechanic 1974 914/6 conversion with 2.7L (The Grey Ghost) 1973 Chalon with 2.4T MFI (Schlitzalom) All my 4 cylinders are gone 
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02-12-2004, 08:33 AM
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914 Geek
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If the friction surface of the flywheel gets cut too far, the clutch disk will hit the flywheel bolts. It's not the worst idea to have them cut down the center part where the bolts ride, so as to keep the same relationship between the clutch disk and the bolt heads.
Well, until the center part is weakened too much--then it really is the worst idea... --DD
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Pelican Parts 914 Tech Support A few pics of my car: http://www.pelicanparts.com/gallery/Dave_Darling |
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02-12-2004, 08:46 AM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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The specs
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02-12-2004, 08:58 AM
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914 Geek
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Those are 911 specs (recognize the drawing), but they should still be valid for the 914 flywheel. Thanks for finding the pic, Mark!!
 --DD
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Pelican Parts 914 Tech Support A few pics of my car: http://www.pelicanparts.com/gallery/Dave_Darling |
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02-12-2004, 09:14 AM
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Registered
Join Date: Mar 2002
Location: Grove City, OH
Posts: 1,397
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I had a bit removed and it cost me $30. I put a shim under the fork ball thing just as a precaution. Works like a champ.
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AKA: Dr Evil on the 914World forum, need your tranny rebuilt, or want a "How to rebuild your transmission DVD" set? PM me. -74 914 with 74 2.7 CIS -74 VW Bus with modified 3.1 corvair engine and 3.0 CIS fuel injection system. -74 BMW R90 |
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02-13-2004, 05:23 PM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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Quote:
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02-14-2004, 12:42 PM
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Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,900
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I had to shave the bolts. About half of the rib around the top of the bolt is mandatory with any machining of the disc surface. I would say that if you have to shave them flat, get another flywheel.
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02-14-2004, 01:16 PM
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74 Porsche 914 2.0 
