Head Bolt Dimensions

Posted By: Dave B.

Head Bolt Dimensions - 09/30/18 10:45 AM

We are Starting a project in Tech school on a Donated 6.1 engine
and as Cylinder heads will be going on and off often I wondered if anyone had the dimensions so i could order non torque to yield bolts?
Thanks for Your Help
Dave B.

Posted By: ric3xrt

Re: Head Bolt Dimensions - 09/30/18 12:54 PM

M12 X 1.5 And top row is M8 I forget the Pitch on the M8

Posted By: MattW

Re: Head Bolt Dimensions - 09/30/18 02:59 PM

M8 x 1.25 i believe

Posted By: Silver70

Re: Head Bolt Dimensions - 09/30/18 06:25 PM

M12 are about 5-11/16" over all, 5-1/4 under the head to end and 3-3/8 is threaded. M8 2" overall, 1-3/4 under head/washer to end. Used a tape measure, so close, but not perfect I'm sure.