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502 flywheel question
Hi, I'm slowly trying to finish up a motor to put in my boat hopefully in a month. Here's my question, I'm going from a gen IV 454 to a gen VI 502. Can I just go to my local gm dealer and get a flywheel for a 502 and it should work or do I need a different one. If so does anyone know the part #. Thanks
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Originally Posted by chuckyarus
(Post 3084525)
Hi, I'm slowly trying to finish up a motor to put in my boat hopefully in a month. Here's my question, I'm going from a gen IV 454 to a gen VI 502. Can I just go to my local gm dealer and get a flywheel for a 502 and it should work or do I need a different one. If so does anyone know the part #. Thanks
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Do you have the flywheel from the 454? It should be the same thing...maybe the numbers on it are different, but it IS the same. Your old MK-4 motor was an external balanced motor as is your Gen VI 502. The crank...forged or cast doesnt make squat for difference. The ONLY differences in flywheels is EXTERNAL balance, INTERNAL balanced or the number of teeth on the flywheel. You will need 168 teeth on whatever flywheel that you get, but you cant mix the flywheels...IE...external balance harmonic balancer and an internal balanced flywheel. I have external balanced flywheels that came off 454's and 502's, and HARK...they weigh the same. If you want one for alot less than what you will pay at the GM dealer...holler if you want one of these
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You need this one
http://www.jegs.com/i/GM+Performance...96987/10002/-1 do not run the old flyweel for the cast cank |
Originally Posted by PSlonaker
(Post 3084593)
Do you have the flywheel from the 454?
You really should not make these comments without knowing for sure. The MKIV engines use a different flywheel than the MK5 and newer. The balance weight is different because the MK5's have a one pc rear main seal and the crankshaft does not have the counterbalance on the back flange. Also, as was already mentioned, the cast crank and the steel cranks use a different flywheel, also due to balancing differences. You have to get the correct flywheel for the engine. Bill Koustenis Advanced Automotive Machine Waldorf Md |
Bill K and Rockfish are correct.
Both have helped me and KNOW what they are talking about. BOTH are respected in the business so listen in learn. I also hate people giving advise that they have no idea what they are talking about.:eek: I would order the ones on ROCKFISH link. Like BALLON I paid $200 X 2 for new ones from 1800. |
Originally Posted by BillK
(Post 3084820)
P,
You really should not make these comments without knowing for sure. The MKIV engines use a different flywheel than the MK5 and newer. The balance weight is different because the MK5's have a one pc rear main seal and the crankshaft does not have the counterbalance on the back flange. Also, as was already mentioned, the cast crank and the steel cranks use a different flywheel, also due to balancing differences. You have to get the correct flywheel for the engine. Bill Koustenis Advanced Automotive Machine Waldorf Md |
Originally Posted by BillK
(Post 3084820)
P,
You really should not make these comments without knowing for sure. Careful now... The MKIV engines use a different flywheel than the MK5 and newer. The balance weight is different because the MK5's have a one pc rear main seal and the crankshaft does not have the counterbalance on the back flange. That is true. Also, as was already mentioned, the cast crank and the steel cranks use a different flywheel, also due to balancing differences. That is not true. There's two 168 tooth flywheels for externally balanced big blocks: 3993827 - MkIV 14096987 - GenV and GenVI Within the same generation engine, it makes no difference if it's a 454 or 502, cast crank or forged. That's the truth. |
Originally Posted by cubicinches
(Post 3084853)
There's two 168 tooth flywheels for externally balanced big blocks:
3993827 - MkIV 14096987 - GenV and GenVI Within the same generation engine, it makes no difference if it's a 454 or 502, cast crank or forged. That's the truth. THANK YOU |
Originally Posted by pslonaker
(Post 3084855)
THANK YOU
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