Exhaust manifold bolt torque specs
 

I have a repair manual that shows that 112 inch lbs are all that is required to torque the bolts down on the exhaust manifold, that's not really that right at all. I have a 2008 t/c and I am doing a turbo replacement right now, I just think it require more torque than just 10 foot pounds?

That's what the GM service manual says as well. I haven't had any leaks. I also tightened in the correct sequence.

This is key.

Can you post up the sequence or point me to a thread where its listed? Helping a friend do a zfr swap this weekend and want to know just incase we have to pull the exhaust mani

Here is the sequence. I forgot about tightening a second time. It will pull down a bit more.

Attachment 21902

mine was good for the first month or so. zzp cast manifold and gasket. then started the most faint annoyance

Do you think the torque specs are too low?

no you are fine.

You don't want to over tighten or you will have a bad day. Stick with what the book says.

Good info right here. I need to install my header next week.

i guess i didnt follow the exact pattern according to the book. but i did a cross pattern

Where can I buy that manual! :)

It's the GM service manual. I was going to say ebay, but the prices there seem sketchy. CED has them for less. If you do try ebay, there should be three volumes.

Thank you