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General Information => Troubleshooting => Topic started by: somolovitch3 on March 15, 2014, 01:20:14 pm

Title: over torque head bolts
Post by: somolovitch3 on March 15, 2014, 01:20:14 pm: About says it all. :'( Read the numbers, did it foot pounds instead of Nm's.

How bad am I off? >:(

Thank you for your time and effert.
Title: Re: over torque head bolts
Post by: 745 turbogreasel on March 15, 2014, 01:56:37 pm: stock bolts?
stretch or non?
If they are stretchy and didn't snap, probably fine
Title: Re: over torque head bolts
Post by: somolovitch3 on March 15, 2014, 02:30:58 pm: 12 pt strech. I figure I am 1/4 turn over what you would be if they were 6 pt. 15 ft#s past (before the two 1/4 turns) what they were supposed to be.This is officially in EggSuck teritory.
Title: Re: over torque head bolts
Post by: Spokerider on March 15, 2014, 07:19:39 pm: Thought I read a post on here about stretch bolts [ in general ] and the correct torque of them, being close to the point of metal failure.

If it were me, I'd eat the cost and buy / install new bolts for piece of mind.
Title: Re: over torque head bolts
Post by: 745 turbogreasel on March 15, 2014, 07:38:04 pm: You can pretty much tell if they fail.
I had a whole bunch fail while tightening,but all the ones which survived installation were fine thereafter. the ones that broke, extract and stuff in a new one, no big deal.
Maybe it would be a concern in an ultra performance motor, but then you probably would not want stretch bolts anyway.
Title: Re: over torque head bolts
Post by: somolovitch3 on March 16, 2014, 03:52:12 am: Okay, Odd thought :o...If I replace each bolt one at a time, think I could save the head gasket, or will I be risking warping the head?

I think I am PAST EggSuck teritory!

Again, Thank you all for your time and effert.
Title: Re: over torque head bolts
Post by: TylerDurden on March 16, 2014, 07:24:45 am: I wouldn't worry too much about it.

Once the bolts reach yield point, they don't add much more pressure and the extra 1/4 turn shouldn't be close to the fail point.
Title: Re: over torque head bolts
Post by: burn_your_money on March 16, 2014, 08:18:50 am: It's reasonably common for people to swap to head studs one at a time to save the headgasket. You should be fine doing it.