 Flywheel specifications, Different 6 vs. 4? |
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| Bartlett 914 |
 Sep 3 2010, 08:31 AM
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#1
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Advanced Member  Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest  |
I am about to do a clutch change on my 2.0 4cyl. Recently on one of Ripper911 threads, Slits posted a link showing the specs for the flywheel. I think that sheet is for the 6. I found the same drawing in the 6 workshop manual. Problem is I have 3 flywheels and according to that sheet, all are worn out. The sheet shows 11mm to be the wear limit on Dimension "C". Mine are all less than 8mm. I have doubts that all have been worked on that many times. Is there a different specifications sheet for a 4 cyl flywheel? Here is a copy of the one I have:
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Replies(1 - 5)
| JFJ914 |
Sep 3 2010, 08:41 AM
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Senior Member Group: Benefactors Posts: 813 Joined: 13-June 03 From: Alpharetta, GA Member No.: 814 Region Association: South East States 
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It is for a 6 flywheel. The "C" dimension applies only to the 6. I have a brand new 4 flywheel and it's not even close to "C" I believe the flywheel can be resurfaced to the 3 relief holes with out a problem.
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| Bartlett 914 |
Sep 3 2010, 08:43 AM
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#3
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
QUOTE(John Jentz @ Sep 3 2010, 09:41 AM)  It is for a 6 flywheel. The "C" dimension applies only to the 6. I have a brand new 4 flywheel and it's not even close to "C" I believe the flywheel can be resurfaced to the 3 relief holes with out a problem. Thanks John. That is reassuring. |
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| Cap'n Krusty |
Sep 3 2010, 09:01 AM
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#4
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
When the heads of the flywheel bolts hit the hub of the disc, you'll know you've got "C" to small ........................ If the bolts you removed have the little lip ground off, it's probably time to toss the flywheel.
The Cap'n |
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| bobhasissues |
Sep 3 2010, 09:01 AM
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#5
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seemingly endless issues with my 914 Group: Members Posts: 218 Joined: 13-February 07 From: Chicagoland Member No.: 7,532 Region Association: None |
Have a PDF of it on my home computer. Will forward it tonight if you don't get it sooner.
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| bobhasissues |
Sep 3 2010, 02:34 PM
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#6
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seemingly endless issues with my 914 Group: Members Posts: 218 Joined: 13-February 07 From: Chicagoland Member No.: 7,532 Region Association: None |
Looks like I have the same specs, someone gave me this in reference to a 914-4 flywheel.
I have an uncut newish and a resurfaced (more than once) flywheel around here somewhere. Jake just returned the resurfaced one from dynamic balancing and said it still had one resurface left in it so consider it close to the minimum spec. For your reference, I will give you measurements from both later tonight.  I was able to take the following measurements off the two flywheels (these are not absolutely precise). New (3500 mile) Uncut Flywheel A=.900=22.86mm C=.446=11.328mm Resurfaced Flywheel A=.890=22.61mm C=.400=10.16mm C was measured from the clutch contact surface (see lower measuring point for A), not from the next step down (which isn't depicted very well in the drawing). I hope this helps. |
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