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General Category >> Rubber Side Down! >> Head Cover / Valve Cover Screws
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Message started by Frikotr on 02/24/17 at 05:27:23

Title: Head Cover / Valve Cover Screws
Post by Frikotr on 02/24/17 at 05:27:23

Hi,

I have just mixed head cover screws by the accident. Is it possible to match screws location by the length?

Title: Re: Head Cover / Valve Cover Screws
Post by Dave on 02/24/17 at 05:37:40

Yes.

Don't over-tighten them - the threaded aluminum strips very easily.

Cylinder head cover bolts 8.0-12.0 N/M 5.9-8.8 Ft/lLB

http://www.hunt101.com/data/500/medium/bolts_in_pic.JPG

Title: Re: Head Cover / Valve Cover Screws
Post by Mekh on 02/24/17 at 06:14:12

I've been wondering... Why a range on the torque?

I usually feel inclined to try and set my tool for the average value (10N/m in this case), but not sure what would be preferrable... lower or upper limit.

Title: Re: Head Cover / Valve Cover Screws
Post by justin_o_guy2 on 02/24/17 at 19:01:34

Just a guess, but I figure the engineers figure the minimum clamping pressure required to keep it together and not leak and the near maximum torque the threads or bolts will survive. I don't use anything but thumb on the 1/4" ratchet head and the pressure of closing fingers on the little stuff. I can feel the clamping moment.
You're way better off going back and snugging
Up a drip than messing something up because you got too macho.

Title: Re: Head Cover / Valve Cover Screws
Post by batman on 02/24/17 at 19:27:41

and the L70 bolt has to be in place when you put the cover on as you won't have room to set in in later if the motor isn't out of the bike.

Title: Re: Head Cover / Valve Cover Screws
Post by Frikotr on 02/25/17 at 05:55:28

thank you folks!