Use drill rod to check your own heads, + de-torque

Posted by ChrisCase [63.199.241.197] on Saturday, April 02, 2011 at 15:24:33 :

In Reply to: M37 engine update posted by Tim Holloway [69.54.28.229] on Saturday, April 02, 2011 at 12:07:16 :

Precision ground drill rod is sold in 3' pieces. It works as a straight edge to check head warpage. Use a feeler gauge between rod and head.

These long skinny heads have a pretty high allowance for warp- .012? anybody get a spec? Hence the thick fluffy head gasket.

Plus, on head removal, it is just as important to detorque a head as it was to torque it on installation. Use a torque wrench to break each bolt loose, then reverse direction to re-torque to a lesser value. Do three steps, same as torqueing.

Plus, always run a tap through the threads in the block to clean them out before install. Dirt and grit prevent a smoooth torque.

Good luck, lunch time here.

Follow Ups:

• Re: Use drill rod to check your own heads, + de-torque - Tim Holloway 16:25:09 04/02/2011
  • .006 for six cylinder heads in general. - ChrisCase 22:57:45 04/02/2011
  • Re: Use drill rod to check your own heads, + de-torque - Kaegi 18:05:26 04/02/2011

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