How often do you need to re torquing a cylinder head?
Well of course I usually deal with under head valve engines that require a re torque at least 3 times minimum when stone cold. As we know real engines don’t have valve covers.
Do you loosen each bolt then retorque?
The factory does not have a recommendation to retorque, nor do they specify to Not retorque. Soooo, should I?? Do you simply pull on the torque wrench while the engine is cold, or do you loosen each bolt and then retorque it. Further, do you loosen all then retorque, or one at a time??
Do you pull on the torque wrench or retorque?
Do you simply pull on the torque wrench while the engine is cold, or do you loosen each bolt and then retorque it. Further, do you loosen all then retorque, or one at a time??
How much torque do you need to retorquing aluminum heads?
As far as retorquing the heads after run in, you should back each one off just a tad and pull to the torque. You won’t get an accurrate torque if you don’t back them off a little bit (maybe 1/16 of a turn). When you torque the heads the first time, bring them all down to torque. Then one by one, back them off a bit and re-torque them.
When to retorque cylinder heads after engine rebuild?
If no mention is made to retorque then you are good to go. When I attended diesel mechanics class in the early 70’s…we always retorqued all cylinder heads after the engines were rebuilt. The engines were run for 2 hours then allowed to cool down before being retorqued to specs. Some points to be made.
Do you need to back off aluminum heads after run in?
Just follow the instructions that ARP gives for their bolts and you’ll be fine. As far as retorquing the heads after run in, you should back each one off just a tad and pull to the torque. You won’t get an accurrate torque if you don’t back them off a little bit (maybe 1/16 of a turn).
Do you have to retorque head bolts after assembly?
No need to retorque after assembly. After all, Geo didn’t request customers to return their vehicles for head bolt service after the first 1000 miles when the car was new. To each their own but I always torque them twice before buttoning up an engine. The second torquing is usually done after the engine has been sitting all day or overnight.