torque to yield head bolts?
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torque to yield head bolts?
A buddy has a 1994 F-250 with a 460 and they are replacing the drivers side head due to the fact somehow the front exhaust bolt hole broke. Anyway will this engine have TTY head bolts and how do you tell a TTY bolt from a normal one?
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pedant
Joined: Jan 2008
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From: EXTREME southwest CT
The HOLE broke?!
Or it broke off IN the hole?
No room I'd imagine.
Helicoil, Keensert or weld up and retap?
Once you get those headbolts out You'll know why It'll take a BIG wrench to get them to yield. 140 ft lbs. ain't going to do it.
Or it broke off IN the hole?
No room I'd imagine.
Helicoil, Keensert or weld up and retap?
Once you get those headbolts out You'll know why It'll take a BIG wrench to get them to yield. 140 ft lbs. ain't going to do it.
Cargo Master
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I was not aware that the 460 ever used TTY bolts. All I ever saw was grade 8 (i believe 9/16) standard thread bolts I always clean them completely run a tap down the threaded holes to clean blow them out then put a little light oil on the threads and torque them to spec in three steps.
Fleet Mechanic
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From: Hesperia, CA
Originally Posted by wtroger
I was not aware that the 460 ever used TTY bolts. All I ever saw was grade 8 (i believe 9/16) standard thread bolts I always clean them completely run a tap down the threaded holes to clean blow them out then put a little light oil on the threads and torque them to spec in three steps.
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Sorry to just get back with you, they broke off the front hole boss for the manifold bolt and their easy solution was to replace the head.
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