cylinder heads torque Haynes manual


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yoland
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cylinder heads torque Haynes manual

Postby yoland » Sun Apr 03, 2011 3:23 pm



Hi, i just change my camshaft and the Haynes manual page 68 article 52 they tell you to tighten the six 10 mm bolts of the cylinder head evenly and the final torque should be 38 to 41 lbf ft .This is to much because it's soft metal .. can anybody give me te right torque ???

I also change my timming belt, what should be the wright tension for the belt ? they tell you in the book that the tension pulley should do the job but it looks not ok to me... ??? any suggestions...
Thanks
Yoland



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MJSantos
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Re: cylinder heads torque Haynes manual

Postby MJSantos » Sun Apr 03, 2011 6:18 pm

Looked in the Honda manual for the 1100s. 49ft lbs on the six 10mm and 8ft lbs on the 6mm. The tensioners take up the belt slack, try tp pull any tighter and the tensioner bearings will fail or the new belt will fail.

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virgilmobile
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Re: cylinder heads torque Haynes manual

Postby virgilmobile » Sun Apr 03, 2011 10:04 pm

I have 125 miles to a gl1100 re-ring job.However when torquing the head bolts,I stripped one out.It cost me $50 for a heli coil kit.I used 2 helicoils in one hole for the right ammount of thread. just clean the bolts.Go slow,even steps,follow the sequence and make sure the hole is clear to the bottom.Don't forget the washers.I don't remember the torque for sure but 40lb sounds close.Better double check tho.

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eklimek
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Re: cylinder heads torque Haynes manual

Postby eklimek » Mon Apr 04, 2011 9:13 am

Honda manual confirms 40 ft lb.

The cam belt is equivalent to "chain drive" without lubricant. Like the bicycle chain of your old 10 speed, tension on active side need be only sufficient for teeth to remain engaged fully and belt to nest. Tension is less important than conformation of meshing teeth and sprocket. As your chain lengthened sprocket teeth wear also accelerated and usually smallest gear slipped.

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virgilmobile
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Re: cylinder heads torque Haynes manual

Postby virgilmobile » Mon Apr 04, 2011 12:48 pm

The "book" says to turn the cam to remove the slack and let the spring loaded idler set the tension.Well maybe 30 years ago.Now I lock it down and check free vertical play on the long run of the belt.About 3/8" full deflection up and down total.First time I used the manuals directions,the belt was as tight as a banjo string.

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eklimek
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Re: cylinder heads torque Haynes manual

Postby eklimek » Mon Apr 04, 2011 2:57 pm

Makes sense. As long as there is no wearing of teeth, the belt does not lengthen and remains fully engaged, increasing belt tension only adds to bearing load.




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