balancing my 502 crate motor
#2
Registered
Join Date: Jun 2003
Location: Newport Beach / California
Posts: 588
Likes: 0
Received 0 Likes
on
0 Posts
I believe they are interchangeable and because you are not running a HP motor I would think it would be ok.
There are others on this board with more expertise, lets see what they have to say.
There are others on this board with more expertise, lets see what they have to say.
#10
Registered
The flywheel wont work because of the balance. It will bolt up but it will not be balanced. The 7.4 has cast pistons, cast crank, and small rods and requires a differently balanced flywheel than the 502 with forged componets. All modern big blocks are externally balanced by use of balanced flywheels and harmonic balancers. There are different part numbers for flywheels from a cast motpr such as the 7.4 and forged motors like the 502.
When I put a 502 crate in my last boat I was aware of this and ordered the correct flywheel from GM. If you have a GM performance Parts Catalog the one you need is the flywheel for a 502 for use with a standard transmission. The engine coupler will bolt on the new flywheel right where the pressure plate bolts on. Its the same flywheel that comes on a merc 502.
Ron
When I put a 502 crate in my last boat I was aware of this and ordered the correct flywheel from GM. If you have a GM performance Parts Catalog the one you need is the flywheel for a 502 for use with a standard transmission. The engine coupler will bolt on the new flywheel right where the pressure plate bolts on. Its the same flywheel that comes on a merc 502.
Ron