27 T exhaust

Ed H

Junior Member
Exhaust manifold to exh. pipe nut. turns on 1 1/4turn then jams. Holley vaporizer the threads are SAE 1 7/8"-16. the new nut is imperial 1-1 7/8"-16 there is a 5 degree difference in thread angle. anyone had this problem?
 
I has to really crank on the nut to get it to seat. I suppose I was kind of cutting a new thread in the brass nut by doing so.
 
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