The Ford Barn

JM 35 Sedan · 03-20-2015, 10:44 AM

I have bought two sets of new Offenhauser heads in the past ten years. I know one set came from Patrick's, not Speedway, and they included instructions to torque starting from one side and ending at the other side. I thought this was odd because all previous Flathead torque specs said start at center and work in sequence towards the ends. It's possible that Offenhauser recommended this to reduce the possibility of warping their aluminum heads if someone initially torqued them too high when starting from the center.
In either case, I think flatjack9, JWL and JSerry have offered the best advice on this thread.

JM 35 Sedan · 03-20-2015, 11:00 AM

Quote:

Originally Posted by barnfind

Just curious - Copper gaskets with aluminum heads is ok?

Simple search results:
http://www.finishing.com/78/97.shtml

Many folks do this after spray coating the copper head gaskets with something like Copper Coat or Aluma Blast paint to help prevent the normal contact reaction between two dissimilar metals such as copper and aluminum.

03-20-2015, 10:44 AM	#21
JM 35 Sedan Senior Member Join Date: May 2010 Location: Near Rising Sun, Maryland Posts: 10,858	Re: heads / torqueing I have bought two sets of new Offenhauser heads in the past ten years. I know one set came from Patrick's, not Speedway, and they included instructions to torque starting from one side and ending at the other side. I thought this was odd because all previous Flathead torque specs said start at center and work in sequence towards the ends. It's possible that Offenhauser recommended this to reduce the possibility of warping their aluminum heads if someone initially torqued them too high when starting from the center. In either case, I think flatjack9, JWL and JSerry have offered the best advice on this thread. __________________ *John* *"Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein* Last edited by JM 35 Sedan; 03-20-2015 at 10:49 AM.