My shop manual has not arrived yet and I was wondering if one of you that has it could give me the torque spec. for the valve cover. Thanks

 

8.7 lbs/ft. (12Nm or 1.2 kg/m).

 

oh shit, too much!!! 12 pounds is what honda told me!! gotta go back it off!! That is for the VALVE cover not the SPARK PLUG cover??? (Please say yes or I may have to buy a new head!!)

[Edited by mdigrappa on 03-06-2001 at 03:48 PM]

 

[QUOTE]Originally posted by mdigrappa
[B]oh shit, too much!!! 12 pounds is what honda told me!!

 

thanks. So you think that over torquing the valve cover by about 6 pounds or so (including tne extension) will or will not hurt the cover, or should I go back it off?

 

Engineering specified torque of a fastener if composed of two primary torque elements.

1)"Run down torque". This torque is defined as the torque of installation...the torque to begin the fastener on it's journey prior to the onset of fastener loading. This may be the friction of the steel bolt against the aluminum housing, a nylok insert in the bolt, or a locking helicoil insert in the housing. .

2) The second "Actual Torque" is the component of the calculation with regards to fastener loading or stretching....the torque that keeps the fastener in tension.

3) Engineering specified torque is that which adds the run down and actual torque together to give us final engineering specified torque.

I would venture to guess that the difference noted is the fact that you failed to account for the "run down" torque while you Honda Technician didn't. 90% of back yard mechanics due the same.
Note: Most automotive manuals only list "actual torque".

In the aerospace industry we take fasteners VERY seriously. Fasteners continue to be the number one cause of aircraft failures in the world today....many times because someone used a torque wrench without understanding what engineering specified torque is.

 

Your covers fine......

 

Utah
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