Flywheel install, need help.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,720
Likes: 19
From: Manhattan Beach Ca
Flywheel install, need help.
I bought an aftermarket flywheel which is SFI approved and seems like it should be a good one. I'm putting in my 383 and was about to put the fllywheel on it when I noticed the flywheel hole size was larger than the stock GM flywheel. The GM hole was loose by maybe 5 to 8 thou but this other flywheel is say 10 to 15 thou looser.
There was no dowel pin on my flywheel.
So my question is, can the bolt holes be that sloppy since the flywheel probably shifts to one side and stays that way forever without a dowel, or should I use a dowel so there isnt so much slop? But if I use a dowel pin, will I mess up the balance? THX
There was no dowel pin on my flywheel.
So my question is, can the bolt holes be that sloppy since the flywheel probably shifts to one side and stays that way forever without a dowel, or should I use a dowel so there isnt so much slop? But if I use a dowel pin, will I mess up the balance? THX
Racer
Joined: Apr 2007
Posts: 361
Likes: 0
From: Sacramento (Citrus Heights) California
I'd use a dowel. The dowels don't weigh too terribly much and probably wouldn't cause harmonic issues since it's so close to the rear main anyway.
I'd rather have a small imbalance than lose a flywheel and destroy my crank, clutch, bellhousing/scattershield, and transmission.
I'd rather have a small imbalance than lose a flywheel and destroy my crank, clutch, bellhousing/scattershield, and transmission.
Pro
Joined: Apr 2007
Posts: 736
Likes: 1
From: Chester VA
I'd use a dowel. The dowels don't weigh too terribly much and probably wouldn't cause harmonic issues since it's so close to the rear main anyway.
I'd rather have a small imbalance than lose a flywheel and destroy my crank, clutch, bellhousing/scattershield, and transmission.
I'd rather have a small imbalance than lose a flywheel and destroy my crank, clutch, bellhousing/scattershield, and transmission.
Post the part number of the flywheel, maye we can verify for your application.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,720
Likes: 19
From: Manhattan Beach Ca
I went ahead and installed without dowel since it would have messed up the balance for sure. With the flywheel rotated all the way to one side, I think it wont be an issue. Seems 6 bolts sharing the load is better than one tight dowel taking everything.
Now I noticed the new flywheel is 0.200 inches thinner than the GM stock. I will need a different clutch fork pivot ball. Have to find and adjustable one on Monday somewhere local. Always the little things....
Now I noticed the new flywheel is 0.200 inches thinner than the GM stock. I will need a different clutch fork pivot ball. Have to find and adjustable one on Monday somewhere local. Always the little things....
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Is the flywheel the Ram flywheel. If so check the disc and make sure the springs clear the flywheel mounting bolts. Some require the springless disk and I think they are thinner.
Could put a pin in to use as a dowel to align it, tighten everything up and remove the pin if you are concerned about it.
Could put a pin in to use as a dowel to align it, tighten everything up and remove the pin if you are concerned about it.
Pro
Joined: Apr 2007
Posts: 736
Likes: 1
From: Chester VA
Is the flywheel the Ram flywheel. If so check the disc and make sure the springs clear the flywheel mounting bolts. Some require the springless disk and I think they are thinner.
Could put a pin in to use as a dowel to align it, tighten everything up and remove the pin if you are concerned about it.
Could put a pin in to use as a dowel to align it, tighten everything up and remove the pin if you are concerned about it.
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