scidav87

iTrader: (16)

Working on a friends car that was stuck on the road. Towed it home and found EVERY bolt holding the flexplate on is broke into the crank. Car is a 2000 Z28 with a turbo 400 tranny. Uses the stock flexplate and the spacer for the converter. Thoughts on this??

senicalj4579

iTrader: (41)

HOLY ****!

TrippyJoey

iTrader: (1)

Maybe he was using subpar hardware bolts instead of Grade 8 or better flexplate bolts

scidav87

iTrader: (16)

They are grade 8 hardware store bolts. I'm hoping they were just over-torque and not some other underlying problem. Car was driving fine then just broke in a 1st gear pull after a new engine tune. Does ARP make the longer bolts needed with the turbo 400 spacer?

TrippyJoey

iTrader: (1)

I'm not sure, but I hope so cause I nees some for my 4L80E spacer.

TurbopigB4C

iTrader: (5)

Unless they were too short I find it hard to believe that all the bolts would shear off without having locked up something.

TrippyJoey

iTrader: (1)

At first when I read it I was gonna say that maybe he was making too much torque but in that case I think the flexplate would go first rather than the bolts Maybe the bolts were the torque to yield kind and they had been used previously.

scidav87

iTrader: (16)

None of the bolts were TTY. I'm thinking they were overtorque and perhaps too short. I'll post more when I get the tranny out. Get some pics too!!

89LS1RS

iTrader: (1)

gm has bolts that are to be used with the spacer. bad idea to substitute hardware store peices. the gm bolts have a little sleeve on them , not sure what it does, maybe stops this from happening