ARP Head Studs (Torque and Sequence)
22 September 2005, 09:33 AM
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This is the sequence io used last year.
Taken from NASIOC
Sorry, I take what I do very serious.
I am available to answer your questions, but only if you ask!
I use the lube that I supplyed with the studs.
If you ask three different people the same question, you are bound to get different answers. That is human nature. Add performance to the equation and our egos seem to take over.
This is the exact process that I use.
First I make sure that nothing is at the bottom of the stud hole in the block. Do NOT use a tap to chase / clean the threads.
Then I put some oil on the bottom threds of the studs.
I then run them in untill they bottom out in the block, "they must bottom out".
Install the gasket and head.
Put the lube on the studs so that when you put the washers on there will be lube between the head and washer. Look at the washer and put the rounded outside edge against the head.
Put more lube on the studs, then install the nuts. Extra lube is better than not enough.
Torque to 20 ft lbs.
Torque to 40 ft lbs.
Torque to 60 ft lbs.
Torque to 85 ft lbs.
I let the motor sit for an hour or so and then retorque at 85.
If you are ****, retorque after running the motor.
I have checked the torque after running on the dyno and during tear down, the only time I see a change is when the motor has been overheated.
Good luck,
Quirt Crawford
Crawford Performance
This is the sequence io used last year.
Taken from NASIOC
Sorry, I take what I do very serious.
I am available to answer your questions, but only if you ask!
I use the lube that I supplyed with the studs.
If you ask three different people the same question, you are bound to get different answers. That is human nature. Add performance to the equation and our egos seem to take over.
This is the exact process that I use.
First I make sure that nothing is at the bottom of the stud hole in the block. Do NOT use a tap to chase / clean the threads.
Then I put some oil on the bottom threds of the studs.
I then run them in untill they bottom out in the block, "they must bottom out".
Install the gasket and head.
Put the lube on the studs so that when you put the washers on there will be lube between the head and washer. Look at the washer and put the rounded outside edge against the head.
Put more lube on the studs, then install the nuts. Extra lube is better than not enough.
Torque to 20 ft lbs.
Torque to 40 ft lbs.
Torque to 60 ft lbs.
Torque to 85 ft lbs.
I let the motor sit for an hour or so and then retorque at 85.
If you are ****, retorque after running the motor.
I have checked the torque after running on the dyno and during tear down, the only time I see a change is when the motor has been overheated.
Good luck,
Quirt Crawford
Crawford Performance
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