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Cylinder Head Torque Model G
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jonkeller View Drop Down
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Joined: 06 Nov 2013
Location: dallas
Points: 16 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jonkeller Quote  Post ReplyReply Direct Link To This Post Topic: Cylinder Head Torque Model G
    Posted: 08 Aug 2016 at 9:21pm
I am finally putting the Continental engine on my G back together.  The Allis G Manual calls for 55 Ft-Lbs on the cylinder head bolts.  The continental manual calls for 35-40 ft-lbs and the Massey-Harris Pony manual  (uses the same engine ) calls for 37.5 -42.5 ft-lbs.  A quick perusal of the internet shows torque values for grade 8 3/8" bolts to be in the low 30's to nothing higher than 45.  What number do you all use ?
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Chalmersbob View Drop Down
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Joined: 11 Sep 2009
Location: Pennsylvania
Points: 2122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chalmersbob Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2016 at 9:28pm
I went by the AC specs.
I too thought the spec was high, but I used it on two engines.
If you read the specs they also state that there are 2 different length head bolts. Mine were all the same length. LOL Bob
4 B's, 1 C's,3 CA's, 2 G's WD, D14, D15, B-1, B10, B12, 712S,
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JoeM(GA) View Drop Down
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Joined: 12 Sep 2009
Location: Cumming,GA
Points: 4837 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JoeM(GA) Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2016 at 9:29pm
I always have a good coat of tacky copper-cote and stop at no more than 45, never had a problem
Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB
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jonkeller View Drop Down
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Joined: 06 Nov 2013
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Points: 16 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jonkeller Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2016 at 10:53pm
Maybe I will just shoot for the middle of the continental range with the bolts lubricated.  I'll put a wrench on them later after I get the tractor running. My bolts were all the same length but I replaced six with bolts 1/4" longer.  On my tractor the holes that take the longer bolts have about an inch of thread while the holes for the shorter bolts have about .625 inches of thread.  So I could go with bolts that are 1/2" longer to make full use of the additional thread.
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