Head bolt torque

Jay Liedman · May 1, 2018

My manual says to torque the head bolts on my MM M602 to 170-175 pounds. That strikes me as quite a bit of torque for a 5/8 inch bolt. Need I be concerned about snapping one off?

kevinj54 · May 1, 2018

(quoted from post at 19:41:57 05/01/18) My manual says to torque the head bolts on my MM M602 to 170-175 pounds. That strikes me as quite a bit of torque for a 5/8 inch bolt. Need I be concerned about snapping one off?

Look up common torque specs.

You do say 5/8 which is a fairly serious bolt when you consider torque values for wheels and main bearings.

rustred · May 1, 2018

looks good to me for a grade 8 course thread bolt. she will take more yet before snapping.

RGMartin · May 1, 2018

Case uses 210 foot pounds on a 5/8" head bolt.

Jay Liedman · May 1, 2018

One thing that is puzzling to me is the specs for the MM M5 say torque to 110, and it is the same 336 ci engine as the M602. Anyone know why the same engine would have different torque specs merely because it was n a different model?

jon f mn · May 1, 2018

I just torqued my case 1030 heads to 200, those are also 5/8.

ChrisQ · May 1, 2018

Gas or Diesel? 670 Super are 170-175. I believe M602 and M5 were less.

Jay Liedman · May 2, 2018

It is a gas engine.

Head bolt torque

Jay Liedman

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kevinj54

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rustred

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RGMartin

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Jay Liedman

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jon f mn

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ChrisQ

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Jay Liedman

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