I've had a preliminary search for this but struggled to find what I wanted, apologies if already covered... My Dad is working on his V8, there was an stripped spark plug so he's had an insert put in, he's now curious as to torqueing the head back up. The original torque setting is 50lbs but as it is an old engine (1939ish) which has been taken apart before is it wise to torque up to 50lbs? The concern being; stripping old bolt threads. He also doesnt want to get new bolts, he'd rather keep it original which I think alot of us can understand. So, to torque or not to torque as specified, that is the question.