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Exhaust manifold bolt torque specs

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Old 06-17-2014, 11:55 PM
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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?
Old 06-18-2014, 12:50 AM
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That's what the GM service manual says as well. I haven't had any leaks. I also tightened in the correct sequence.
Old 06-18-2014, 07:35 AM
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Originally Posted by 1Panel2NV
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.
Old 06-18-2014, 08:53 AM
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Originally Posted by 1Panel2NV
That's what the GM service manual says as well. I haven't had any leaks. I also tightened in the correct sequence.
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
Old 06-18-2014, 02:55 PM
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Here is the sequence. I forgot about tightening a second time. It will pull down a bit more.

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Old 07-01-2014, 01:25 PM
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mine was good for the first month or so. zzp cast manifold and gasket. then started the most faint annoyance
Old 07-02-2014, 06:25 PM
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Originally Posted by i944scania
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?
Old 07-02-2014, 06:36 PM
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Originally Posted by Darkfuzion
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.
Old 07-02-2014, 07:08 PM
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Good info right here. I need to install my header next week.
Old 07-24-2014, 09:15 AM
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i guess i didnt follow the exact pattern according to the book. but i did a cross pattern
Old 11-18-2014, 01:40 PM
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Originally Posted by 1Panel2NV
Here is the sequence. I forgot about tightening a second time. It will pull down a bit more.

Where can I buy that manual!
Old 11-19-2014, 12:00 PM
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Originally Posted by boostbalt
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.
Old 11-19-2014, 05:27 PM
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Originally Posted by 1Panel2NV
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
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