Thread: drive plate weight

new idea... the motor is already assembled so i think im just going to pick up a neutral flex plate that hasnt been balanced.

Originally Posted by WOTFTW

new idea... the motor is already assembled so i think im just going to pick up a neutral flex plate that hasnt been balanced.

This is not a good idea, you will definitely have an imbalance problem. L67 engines require the external weight for balance. As previously mentioned, the flexplate will only bolt on one way which will locate the weight in the proper position. what has not been mentioned is that the flexplate to crankshaft bolts are tty bolts and should not be reused. I am sure a dozen people will post that they reused them, but it is not the right way to do it. If you reinstall your original flexplate with new bolts using the proper tightening procedure, you will be fine. My 2cents.

Originally Posted by bobsgtp2nv

This is not a good idea, you will definitely have an imbalance problem. L67 engines require the external weight for balance. As previously mentioned, the flexplate will only bolt on one way which will locate the weight in the proper position. what has not been mentioned is that the flexplate to crankshaft bolts are tty bolts and should not be reused. I am sure a dozen people will post that they reused them, but it is not the right way to do it. If you reinstall your original flexplate with new bolts using the proper tightening procedure, you will be fine. My 2cents.

Yea good advice bobsgtp2nv, I think I confused everyone including myself.

If the motor has the original rods and pistons then you should use the stock flexplate. The motor has already been externally balanced by GM. Machine shops routinely mark the rods/pistons 1-6 so the assembler won't have any balance issues.

I got new TTY bolts from ZZP on the cheap and the last motor I built is just a DD. Better to be safe than sorry.