Author Topic: Head bolt torque pattern?  (Read 156 times)

TBowman

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Head bolt torque pattern?
« on: June 14, 2022, 11:59:07 AM »
Hi all,

Getting ready to put the head back on my motor. Is there a torque pattern shown in the service manual?

Thank you
Tim

ps any help with torque specs on exhaust and intake manifold bolts would be greatly appreciated too.

Smadge

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Re: Head bolt torque pattern?
« Reply #1 on: June 14, 2022, 03:08:22 PM »
Here you go.
1941 M2-232 Autocar (restoring)
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Smadge

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Re: Head bolt torque pattern?
« Reply #2 on: June 14, 2022, 03:28:22 PM »
There is a lot of discussion on the proper head bolt torque and i believe 70-75 ft lbs is correct.  Some of the TM's have a much higher, incorrect, torque.  I looked in my manuals and didn't see any specs on the manifolds other then tightening them down..

Paul
1941 M2-232 Autocar (restoring)
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TBowman

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Re: Head bolt torque pattern?
« Reply #3 on: June 14, 2022, 03:44:45 PM »
Thank you both very much!!   I appreciate it.

Tim

8683jb

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Re: Head bolt torque pattern?
« Reply #4 on: June 14, 2022, 06:08:17 PM »
Tim -

As Paul said, be sure NOT to use the head bolt torque listed in TM 9-710. You can go online and look up a generic torque chart for the other various fasteners that don't show a torque value in the manual.





'42 Autocar M2A1

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Torque

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Re: Head bolt torque pattern?
« Reply #5 on: June 14, 2022, 07:50:07 PM »
The civilian versions of the AX160 are the 150A, 250A, 450A, 460A and 462A. My 1967 Motors manual lists the head torque for all these civilian engines as 105-110 ft lbs and that is what I torqued my engine to.
 It lists intake and exhaust manifold bolt torque as 25-30.

TBowman

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Re: Head bolt torque pattern?
« Reply #6 on: June 14, 2022, 09:17:47 PM »
Thank you very much.

I read a few of the threads regarding those high torque numbers.  yikes!    Cant wait to get this thing bolted back together and fired up ***fingers crossed**

Thanks again for the helpful info.

Tim