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> Flywheel replace?, when do you need too?
eg914
post Jan 12 2009, 01:30 AM
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Pulled the trans for an oil seal replacement, and my clutch disc is down to the rivets on the pressure plate side. I thew in an old disc to keep me going (daily driver).

My question is, can I reuse the flywheel I have, or does it need to be resurfaced or replaced? How can I tell if the flywheel is OK to use as it is?

Seems like the Pelican and AA kits can include flywheels, but that adds a bit to the cost. Just trying to figure out what the hit to the budget is going to be.

Thanks
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southernmost914
post Jan 12 2009, 08:06 AM
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You should at least resurface it to keep it from grabbing and smooth operation. Keep in mind these are 30+ year old flywheels and most likely have been machined before. I do not know the specs but you would have to spec it after machining. It better and cheaper in the long run to do it right than do it twice. (IMG:style_emoticons/default/biggrin.gif)

Steve
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So.Cal.914
post Jan 12 2009, 08:50 AM
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Just make sure the face has not been cut so much that the clutch disc center rubs on the F/W center bolts.
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eg914
post Jan 12 2009, 10:45 PM
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Thanks for the replies. Guess I will have to spend the bucks for a flywheel. I can't afford much down time when it comes to replacing the clutch. The flywheel is in the car now, and I probably won't have time to get it surfaced locally.


If I install a different flywheel will I need to check the end play of the crankshaft, or is that flywheel independent?

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So.Cal.914
post Jan 13 2009, 01:27 AM
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I would check it for sure.
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Mark Henry
post Jan 13 2009, 06:48 AM
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You must check the end play if you change flywheels, good thing to check even with the same flywheel. You also should replace the flywheel seal and O-ring. If you have your ducks in a row with a good machine shop they should be able to grind your flywheel while you wait.

I wouldn't do it now, but on a tight budget I've reused a flywheel as long as the friction surface is flat (using a straightedge) and not glazed or burnt.
BTDT
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Jake Raby
post Jan 13 2009, 07:26 AM
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QUOTE(Mark Henry @ Jan 13 2009, 05:48 AM) *

You must check the end play if you change flywheels, good thing to check even with the same flywheel. You also should replace the flywheel seal and O-ring. If you have your ducks in a row with a good machine shop they should be able to grind your flywheel while you wait.

I wouldn't do it now, but on a tight budget I've reused a flywheel as long as the friction surface is flat (using a straightedge) and not glazed or burnt.
BTDT

Yep, what Mark said...
Post some pics of it and I can tell you whether it has another "life" left in it for machining (more than likely)
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Porsche Rescue
post Jul 8 2009, 05:39 PM
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Jake, can you tell from this pic if the flywheel can be turned? I believe it only has 110K on the engine and I can't tell if it has ever been turned.
There is a deep groove on the outer circumference of the contact surface. It matches the light colored ring, about a 1/4" wide on the outer circumference of the disc.
Since there are no rivets out there, I can't figure what made the ring. Clearly the flywheel should have been turned before this disc was installed.
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Jake Raby
post Jul 8 2009, 08:14 PM
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It looks low, but **may** have one more life in it... Have it measured.
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Porsche Rescue
post Jul 8 2009, 10:58 PM
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Can you tell me the spec? Search here is unclear. Some say 11mm (disc surface to mounting surface) and others say 7-8mm. I know the plate mount surface and disc surface must be maintained at 22.5.
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JFJ914
post Jul 9 2009, 09:31 AM
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You will probably be ok as long as there is still a "step" left from the working surface toward the inner atachment.
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