hogwild1717

I have a gmpp 350 290hp crate motor in a '86 silverado with a tci th350 with a 1900-2400 stall. my problem is i broke 2 flywheels around the bolt pattern of the crank. the flywheels i have are pioneer non sfi approved. should I buy a heavy duty one? i'm lost any help would be very helpful!!!

cabel1

iTrader: (3)

Do you have the dowel pins in the block?

hogwild1717

no, i just went and looked and no dowel pins?

00silver6

iTrader: (4)

im curious to what you find a guy at work had the same problem with his truck. good luck with it

00silver6

iTrader: (4)

im trying to think of what he said he's deployed so i can't ask him but i think he said something about going back to the gm flexplates. I thought it sounded funny when i heard it but who knows, just throwing it out there

hogwild1717

thanks man, i'm just gonna get an sfi approved flexplate and grade 8 bolts oh and a dang dowel pin! must have got in a hurry and forgot it

01ssreda4

iTrader: (96)

Flexplate not flywheel.

cabel1

iTrader: (3)

They will break without the dowel pins, I have seen it before. They aren't perfectly centered without them.

forcd ind

iTrader: (7)

i think he was talking about the 2 dowel pins in the block, not the crank
are you missing them in the block or crank