cylinder head bolts retorque

[kully 560]

does anybody retorque there cylinder head bolt after a valve adjustment?

[siteunseen]

I don't. No need in my opinion.

Once you get that 80lbs they stretch, the gasket is set too. Don't mess with that I say.

[kully 560]

heu siteunseen , I read in the z car guide .com that after head install the head need to be retorqued 600-1000 miles ans every 12,000 miles for all s30 cars? I rebuilt my motor back in the late 90s and never check the head bolts after ,I did not think I had to but this guide says different!! just checking with everybody what the deal is. thanks

[siteunseen]

I'm sorry, I haven't read that. More members will chime im..

@240260280 just did!

Oops, he commented on another post. Wait for it...

Edited October 17, 2020 by siteunseen

[kully 560]

I also read that 60lbs max?

[siteunseen]

5 minutes ago, kully 560 said:

I also read that 60lbs max?

I'm sorry, your right. Tom Monroe's book that I've used more than once says 61 ft. Lbs.

[240260280]

Most do not do this. Perhaps dealerships did this back in the day. 

If you remove the head then some re-torques after re-installing would be good to do. Perhaps after 100mi and 1000mi

[kully 560]

never did I retorque head bolt after a valve adjustment. I guess tomorrow when the motor cools down I will check the head , intake and header bolts just because it gives me a piece of mind and also would like to see if anything has change.

[Zed Head]

After so many years and miles it's dangerous to mess with the head bolts.  Some are probably rusty and ready to break.

On that topic, has anyone considered the clamping force of a head bolt that's half rusted through?  Might be a cause of blown head gaskets on old engines. Who knows.

[kully 560]

the only thing in my favor after the rebuild in the late 90s that I have not put 3000 miles on the motor . it comes out in nice weather 1-2 times a month for a 30-40 mile drive only. It is  also keep it in a heated garage .so I guess can throw a torque wrench on it and see where it is, if it does not move at 60lbs I will leave it alone. I guess on an old motor and left out side in the weather I would think twice about ,I agree with you on that. I did not know nissan recommends a cylinder head bolt torque after a valve adjustment. this could be a can of worms as I don't think anybody does it .

Edited October 17, 2020 by kully 560
adding

[240260280]

Start at 40 and work up if you are not sure.

[kully 560]

will do , that is a good plan