cantfind2nd

iTrader: (24)

How many degrees can you go past recommended last 90 degree turn before they break? Reason I ask is I went an extra 45 degrees due to using the first random directions I googled. To later find they were wrong. So I went torque to 22 ft/lbs 90 , 90 then 45 degrees which is maybe 1/8th of a turn. Think it is ok ? Or should new bolts be installed ? Thanks

KCS

iTrader: (20)

I'd replace it. They're inexpensive compared to having to do it all over again if it blows out the headgaskets or worse.

Paul Bell

iTrader: (9)

Agreed. You already pushed them beyond TTY. They're ready to pop. I wouldn't trust them beyond a few heat/cool cycles. I'd say you're lucky they didn't pop yet.

cantfind2nd

iTrader: (24)

1/8 th of a turn isnt much to go past. I honestly cant see it making a difference. I turned a head bolt on a junk motor i have 3 complete turns past tight before it broke today.

Paul Bell

iTrader: (9)

Are you sure you wanna take a chance with stock bolts? There have been a few who've broken GM head bolts before getting to their angle.

cantfind2nd

iTrader: (24)

There has to be a margin of error , because not every bolt will be the same in every engine. But now im nervous and will be replacing them. Its not my engine doing it for someone else. I have arp studs in my engine.

JakeFusion

iTrader: (7)

I'd throw them away and get ARP bolts at least. Screw GM TTY.

cantfind2nd

iTrader: (24)

Not my car , my car has arp's .