Flywheel balancing
Thread Starter
Burning Brakes
Joined: Jan 2007
Posts: 960
Likes: 25
From: Middlesboro KY
I checked with the local engine machine shop and they offered the following:
- The flywheel in question is neutral balanced at production.
- It is not necessary to balance the clutch with the flywheel.
- Very few people know about the shim application but if one was used with the flywheel, the installer was no dumby...he obviously determined the need, possibly resulting from a radical resurfacing of the flywheel. He went on to say the shim may have been required to ensure proper engagement of the starter with the flywheel. He also said if there is a sharp edge on the flywheel edge (and there is not) it may have been resurfaced beyond its usefulness. Finally, he said he's unaware of a measurement to determine "remaining life" of a resurfaced flywheel.
- The flywheel in question is neutral balanced at production.
- It is not necessary to balance the clutch with the flywheel.
- Very few people know about the shim application but if one was used with the flywheel, the installer was no dumby...he obviously determined the need, possibly resulting from a radical resurfacing of the flywheel. He went on to say the shim may have been required to ensure proper engagement of the starter with the flywheel. He also said if there is a sharp edge on the flywheel edge (and there is not) it may have been resurfaced beyond its usefulness. Finally, he said he's unaware of a measurement to determine "remaining life" of a resurfaced flywheel.
Le Mans Master
Joined: Oct 2000
Posts: 7,831
Likes: 5
From: Austin TX
This is interesting - I just remembered about the orange instruction sheet that comes with a Centerforce clutch.
I dug one out and it says "The thickness from the crankshaft flange to the face of the flywheel should be .950" (stock thickness)".
IIRC I measured my GM nodular flywheel and it was right at what they said...
I dug one out and it says "The thickness from the crankshaft flange to the face of the flywheel should be .950" (stock thickness)".
IIRC I measured my GM nodular flywheel and it was right at what they said...
Thread Starter
Burning Brakes
Joined: Jan 2007
Posts: 960
Likes: 25
From: Middlesboro KY
This is interesting - I just remembered about the orange instruction sheet that comes with a Centerforce clutch.
I dug one out and it says "The thickness from the crankshaft flange to the face of the flywheel should be .950" (stock thickness)".
IIRC I measured my GM nodular flywheel and it was right at what they said...
I dug one out and it says "The thickness from the crankshaft flange to the face of the flywheel should be .950" (stock thickness)".
IIRC I measured my GM nodular flywheel and it was right at what they said...
Thread Starter
Burning Brakes
Joined: Jan 2007
Posts: 960
Likes: 25
From: Middlesboro KY
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
I'm moving a flywheel from one engine to another. Operates smoothly in the outgoing motor, i.e., no wobbling, vibration or other symptoms of imbalance. Is there any reason I should have the balance checked before installing in the new motor? Although the old clutch has less than 6k easy miles, I'm replacing it with a new clutch due to input spline differences. Surface of flywheel is very smooth, no noticeable surface issues. Any reason to resurface?
Thanks,
Bill
Thanks,
Bill
Any time a flywheel is turned it should be reblanced and once its neutral bolt the clutch cover on and bring theat into zero and index the cover to the flywheel so it goes on in the same position.
So far I have never seen a zero flywheel after its been turned and never seen a clutch cover that was zero either, Some have been real close and others off alot.
Instructor
Joined: Mar 1999
Posts: 149
Likes: 23
From: Tulsa OK
In today's world don't expect new parts to be built with the quality of years past.
I balance all new pressure plates after three in a row that had to be removed and balanced.
Too much work, doesn't cost much to balance. Do it one time.
I balance all new pressure plates after three in a row that had to be removed and balanced.
Too much work, doesn't cost much to balance. Do it one time.
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