Head bolts torque specs
#1
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Head bolts torque specs
I am replacing the heads in one of my 454 motors this weekend and was wondering if anyone can tell me where to go to get the specs on what to torque eveything down to.
#3
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Do you have new head bolts????? I would probably use new bolts. Torque specs can vary depending on the bolt and lube used on the bolts.
80lbs is most likely fine though. Torque them down in 20# increments and in the torque the bolts in the proper sequence.
When they are all torqued to 80#, loosen each bolt one at a time in the proper sequence and then retorque that bolt to 80#. You also have to use a sealant on any bolts that go into a water jacket.
80lbs is most likely fine though. Torque them down in 20# increments and in the torque the bolts in the proper sequence.
When they are all torqued to 80#, loosen each bolt one at a time in the proper sequence and then retorque that bolt to 80#. You also have to use a sealant on any bolts that go into a water jacket.
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If the heads are cast iron, the above is right, use 30wt oil on the underside of the head of the bolt and threads, all the same. If you have to use sealant on the threads, use aviation sealer and use it on all the bolts whether they go into a jacket or not.
All 3/8-16 bolts that go into cast iron (like intake/exhaust/fuel pump) are 35 ft-lbs. If the head is alum. take 10 ft-lbs off both the above torque values.
BT
All 3/8-16 bolts that go into cast iron (like intake/exhaust/fuel pump) are 35 ft-lbs. If the head is alum. take 10 ft-lbs off both the above torque values.
BT