Crankshaft Pulley Keyed?

[mick]

Could somebody tell me if LLY Crank Pulley is keyed or just a Press fit like alot of engines seem to do these days. Appreciate info and hope somebody gives me good news and says it has keyway - Mick

 

[bullfrogjohnson]

mick i am 99.9% sure it is keyed, if not the crank pully could rotate on the shaft, i even think there have been problems of people not getting their pully tight enough and sheering the pin off

 

[mick]

double posted

 

[mick]

BFJ Thanks.I'm hoping so - if not bit of machine work to fix it so I can run S/C pulley. My manual shows pic of it but doesn't show keyway. There are a few around now that will know for sure and will chime in -

 

[JOHNBOY]

There just a pin in the snot to drive it. The pulley just slips on. The BMF bolt holds it all on.

 

[LBZ]

Well that's gay!! No wonder they shear occasionally. Anyone know what the torque is on that BMF bolt!! Is it Right hand or Left hand thread?

 

[McRat]

Bolt is standard right hand thread. Get the biggest cheater bar you can, then go get another a bigger one. Then use them both. My 3/4" impact won't phase it.

I think the official torque spec is one bazillion ftlb's, but I think they are tighter than that.

Do not reuse crank bolts. Ever. These are always to be replaced on modern GM engines when removed.

And yes, the LB7/LLY/LBZ crank is pin'd with a Walmart Quality extra-dainty pin. Cheap bastards.

 

[mick]

Bolt is standard right hand thread. Get the biggest cheater bar you can, then go get another a bigger one. Then use them both. My 3/4" impact won't phase it.

I think the official torque spec is one bazillion ftlb's, but I think they are tighter than that.

Do not reuse crank bolts. Ever. These are always to be replaced on modern GM engines when removed.

And yes, the LB7/LLY/LBZ crank is pin'd with a Walmart Quality extra-dainty pin. Cheap bastards.

Thanks for that. I'll be taking mine off LB7 engine next week