Intake and Exhaust manifold nut torque

R

Rob Doe

Well-known member
Well, I watched a You tube video that stated some guys tighten to 25 foot pounds while others go all the way to 60. I checked the torque on mine yesterday and found they were around 25. I upped them to 30. Looked in the Les Andrews book, but didn't find a recommendation.



In the back of the book, it has a torque chart that gives numbers for 7/16 bolts, grade 2, 5, and 8. It lists dry and lubed etc. But, it doesn't say anything about a stud.


What say y'all.
 
"good and tight" is about right !! I suspect that about 99.9% of all Model A's lived their first 50 -60 years without ever encountering a torque wrench.

Joe B
 
The cup washers on the manifold studs are springs that accommodate thermal expansion. The washers should not be compressed by tightening the nuts. Just tighten the manifold nuts enough to stop any leakage with the engine running and hot. Periodically check for leaks and snug the nuts to stop any leaks found.
 
You must log in or register to reply here.
Back
Top