Torquing head bolts ???
05-03-2013, 11:13 PM
#2
If you are using "NEW" factory bolts, the answer is no. They are a TTY and require the intervals based in degrees as opposed to ft-lbs. If you are using ARP bolts torque all the M11 bolts in the factory sequence order in three phases from 35 ft-lbs, 55 ft-lbs, to 75 ft-lbs, then torque the smaller ones to 25 ft-lbs in their same sequence. If you are trying to re-use your old factory bolts, your in for a bigger project than you intended for... Hope this helps.
05-03-2013, 11:24 PM
#3
If you are using "NEW" factory bolts, the answer is no. They are a TTY and require the intervals based in degrees as opposed to ft-lbs. If you are using ARP bolts torque all the M11 bolts in the factory sequence order in three phases from 35 ft-lbs, 55 ft-lbs, to 75 ft-lbs, then torque the smaller ones to 25 ft-lbs in their same sequence. If you are trying to re-use your old factory bolts, your in for a bigger project than you intended for... Hope this helps.
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05-04-2013, 07:32 PM
#10
I hate to bring this up but the factory doesn't use a angle torque wrench to tighten the head bolts.........they torque um the old fashion way............but you can believe what ever smoke gm wants you to see.
05-04-2013, 11:26 PM
#13
GM has never said that you can reuse the bolts. Ever! I worked for a GM dealer for a very long time as a technician before I started working on airplanes. We never reused the bolts per GM's directions. It was not recommended to replace them, it was REQUIRED. You sir, can believe whatever you may like but when you reuse your bolts because you think you can, don't come on here crying about help to pull the broken bolt out of the block... There is more than enough information out there for anyone to find, and your statement of what you believe is factual information will not be found by an approved, recommended, or respected site, engine builder or GM. ARP makes a quality part and for a reason. Oh, and brake in your context is spelled break.
05-05-2013, 05:36 AM
#14
EXCEPT when the consumer has to do any work on the engine gm says you gotta jump through a few hoops......
believe what you want.
05-05-2013, 06:40 AM
#15
gm can get away with that because as you said they all get torqued together and the torquing tool that gm uses tightens them to a point where the bolts are stretched and hold their torque.
the avg joe with a torque wrench cant torque them all at the same time and therefore must use the angle method to ensure each bolt is stretched to provide accurate clamping power.
have you ever pulled an old TTY bolt out and compared it to a new one? You can visibly see that its a little longer after its one torque pass. Believe what you want and have fun pulling broken tty bolts out
the avg joe with a torque wrench cant torque them all at the same time and therefore must use the angle method to ensure each bolt is stretched to provide accurate clamping power.
have you ever pulled an old TTY bolt out and compared it to a new one? You can visibly see that its a little longer after its one torque pass. Believe what you want and have fun pulling broken tty bolts out
05-05-2013, 10:16 AM
#16
I watched um put the engines together..........they use a standard multipoint torque air tool. Tightens all the bolts in one shot.....NO angle dangle or FANGLE involved.
EXCEPT when the consumer has to do any work on the engine gm says you gotta jump through a few hoops......
believe what you want.
EXCEPT when the consumer has to do any work on the engine gm says you gotta jump through a few hoops......
believe what you want.
05-05-2013, 10:33 AM
#17
Gm machines torques all the bolts at the same time. You can bet the computer can torque and keep going to a predetermined angle and you not even notice it by simply watching the operation. Torque to yield is just that. You can't reuse them because they are stretched to a point where they don't return. ARP hardware is torqued to 75% of yield and can be reused.
