 Flywheel wear limit drawing? |
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| PDXMike |
 Jan 7 2013, 02:53 PM
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#1
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Slowly Learning  Group: Members Posts: 111 Joined: 20-December 10 From: Portland, OR Member No.: 12,501 Region Association: Pacific Northwest  |
Can anyone confirm if this is the correct drawing for resurfacing the flywheel? Is the 11mm wear limit correct? I ask because the cross-section near the center of the hub doesn't look QUITE the same as my flywheel
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| Dave_Darling |
Jan 7 2013, 04:43 PM
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#2
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914 Idiot Group: Members Posts: 14,981 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Which flywheel are you talking about? 914-4? 914-6? Other 911 engine installed in a 914?
There is no 914-4 diagram, at least not that I've been able to find. The closest I've seen is only for the 914-6. I hope that the dimensions are the same for the -4 version, but quite frankly I don't know. And before someone tells me "Oh, it's in the little spec book!", go look at your copy. Is that a four-cylinder one, or the six-cylinder? Because my book, and the other ~half-dozen copies I've looked at, only had the 914-6 diagram... --DD |
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| Bartlett 914 |
Jan 7 2013, 05:02 PM
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#3
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Advanced Member Group: Members Posts: 2,214 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
I have a flywheel that is in very good condition and I have 9.11mm I am sure the wear limit of 11mm is not correct for a 4
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| rjames |
Jan 8 2013, 12:22 AM
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#4
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I'm made of metal Group: Members Posts: 3,920 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest
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I tried long and hard to find this info but never did. I ended up biting the bullet and buying a new flywheel to play it safe. A new/uncut is something =< than 9mm as that's the measure mine was when purchased new. Nice to know that the new one will most likely outlast the life of the car.
If you re-use yours, make sure that the top of the bolts don't sit above the surface. You don't want them making contact with the clutch disk. I think that's the main concern since you could adjust the clutch for a change of 1mm. Some have shaved the bolt heads down, but I didn't want to go that route. |
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| Mark Henry |
Jan 8 2013, 08:32 AM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Did you get that diagram from one of my old posts?
The dimension "A" is correct, "C" is debatable. "B" is pretty well WTF? For dimension "C" grind the heads of the flywheel bolts, shim the pivot as needed and once a 6 spring clutch disc starts hitting the flywheel bolts it's done. If you have a choice you want to pick the flywheel with greatest dimension "C". |
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