Torqueing heads

[skyedriver]

Retorqued the head this evening after running the car for a few days. Todays connundrum is, why would the front nuts need tightening up and the rear ones didn't?
Just wondered.

>> Edited by skyedriver on Wednesday 3rd May 23:44

[Wildfire]

Possibly because the rear ones are also held down by the rocker bolts and gear????

[skyedriver]

Not sure thats it, also re-did the valve clearances and only the exhausts were out (too tight). Hope thats not valve seat regression, I am using Valvemaster Plus. Am i getting too quizacle (spelling?) (or paranoid) for my own good?

>> Edited by skyedriver on Wednesday 3rd May 23:46

[Wildfire]

Don't think you'd get noticable valve seat regression after a few days. Probably just the head setling.

[selbymsport]

skyedriver said:

Retorqued the head this evening after running the car for a few days. Todays connundrum is, why would the front nuts need tightening up and the rear ones didn't? Just wondered. >> Edited by skyedriver on Wednesday 3rd May 23:44

it's usually caused by lack of thread lube on assembly, the longer studs are subjected to more heat as they are under the rocker cover. Better to assemble with moly thread lube and cold torque to 40 lb ft then warm engine to 65-70 degrees switch off and let it heat soak for a few minutes then re torque to 45lb ft not forgetting to reset the rocker clearence