454 Gen IV to Gen V flywheel , coupler ?
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454 Gen IV to Gen V flywheel , coupler ?
I've removed the 454 Gen IV motor from my formula and am replacing with a rebuilt Gen V motor. the question is can I use the flywheel and coupler from the gen IV on the Gen V.
the old motor was a 1990, the new is 92-96 vintage. or so i'm told.
Thanks
the old motor was a 1990, the new is 92-96 vintage. or so i'm told.
Thanks
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The IV's and V's have a different balance and the V's have two different flywheels, one forged and one for cast cranks. Any good machine shop can balance your Mark IV flywheel to Gen V specs for about $50. Good luck.
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So basically as long as the flywheel fits the crank properly I just need to get it rebalanced?
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Yes, all big blocks and old small blocks have the same crank bolt pattern. Just make sure you get it balanced to the right specs, or like offthefront says use a Gen V/VI, just make sure it's the right one. The cast cranks have a different balance then the forged..
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On the Gen V, the harmonic balancer and the flywheel are different then the mark 4.
You can use an automotive flywheel with a new style coupler and a new style bell housing.
If you use the old style coupler, you will need to use the old style bell housing..
I just finished a motor swap to a Gen 5 from Mk 4 this weekend..
In addition the sea water pumps are different on the Gen V if you want to use a mechanical fuel pump for a carb. Or, you can use an electric fuel pump if you are using a carb or EFI.
In addition, the oiling system is different on a Gen 5..
If you close the cooler lines along the pan rail, you need to be sure the bypass valves are redone accordingly.. If it's a Gen 5 marine motor, then you should be able to bolt in the oil and cooler lines in the filter adapter...
I chose to use the cooling lines in the pan rails, and not use the Merc Filter/Cooler adapter.... (Less plumbing hoses and more space). In addition, I am using an electric fuel pump...
Hope that helps.....
You can use an automotive flywheel with a new style coupler and a new style bell housing.
If you use the old style coupler, you will need to use the old style bell housing..
I just finished a motor swap to a Gen 5 from Mk 4 this weekend..
In addition the sea water pumps are different on the Gen V if you want to use a mechanical fuel pump for a carb. Or, you can use an electric fuel pump if you are using a carb or EFI.
In addition, the oiling system is different on a Gen 5..
If you close the cooler lines along the pan rail, you need to be sure the bypass valves are redone accordingly.. If it's a Gen 5 marine motor, then you should be able to bolt in the oil and cooler lines in the filter adapter...
I chose to use the cooling lines in the pan rails, and not use the Merc Filter/Cooler adapter.... (Less plumbing hoses and more space). In addition, I am using an electric fuel pump...
Hope that helps.....
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