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Snaped Head Stud?

1400r

By 1400r,
in Engines & Forced Induction

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1400r Veteran

1400r

Posted
Posted

boss was putting the head on his rb25de after installing the 1.6mm h/g

he was told to torque them up to 103nm -113nm

anyway one snaped down near the threaded section

captn thread are coming tuesday to fish out the rest of the stud left in the block

my question are

is this unusual to have them break ?

was he told the right torque setting?

and should I convince him to go after market head studs(arp or something) since will have to order atleast one new one now from nissan

thanks have a great weekend

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dead32 Mentor

dead32

Posted
Posted

was he using the old headbolts? if so bad practice, secoendly make sure the bolt holes are cleaned and free of water/oil/crap so the bolt can go all the way in and not hydrolic lock due to shit in the bolt hole and thirdly lube the new headbolts lightly.

boot_it Enthusiast

boot_it

Posted
Posted
thanks guys yes he was using the old bolts

bolts seemed clean

I dont think he was told this way

tighten to 29nm

tighten to 98nm

loosen to 0nm

tighten to 25-34nm

tighten to 95-100 degrees or 93-103nm

I'll let him know thanks

thats why the bolt snapped skylines use torque to yeld head bolts and should only be used once as the bolt streches to the correct setting

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