torque specs aluminum intake

[64SF]

I thought I read somewhere the torque specs for an aluminum intake manifold is less that the 40 ftlbs for the cast iron on a 440. Anyone know?
Thanks

 

[Cranky]

I torque them for whatever the size bolt requires...and don't forget to use washers on it!! And thicker than just a normal washer....

 

[67 B-body]

Tight is Tight, and too Tight is Broken.... Lol!!

 

[67 coronet]

the idea behind lower torque spec on aluminum intake is so you dont warp the corners and get a leak.no way you could warp a factory iron manifold and you are squishing a steel shim for a seal with them.just make it good and snug.with proper gasket it will seal up.

 

[RustyRatRod]

The slant 6 aluminum intakes only torqued to 10 pound feet and sealed just fine. I wouldn't go much more than 20. Course some of um you can only go by feel cause you caint get a torque wrench on um.

 

[Meep-Meep]

I've just used the good 'ol tighten it down 'till it's tight method. You are tightening it against the valley pan gasket and it's all the way across the mating surfaces so you can't really screw it up - unless you don't put washers under the bolts like Cranky said. But that just prevents the bolts from digging into the soft metal. The sure way to break an ear off is to have the ear with the bolt hole be unsupported while tightening it. Like if the gasket was just around the ports and you waled on the outer corners.