edelbrock performer rpm intake torque specs

hello
i am putting on a performer rpm intake on a sbc with iron heads and was told to torque it down to 30 ft pds in a staggered pattern is this correct? i broke 2 bolts while torquing it down i am wondering if anyone has ever run into this and what i need to do, i know it is not my torque wrench as the first time i tryed to install it i broke one so automatically assumed it was the wrench reading wrong so i went and bought a brand new one and attempted it again and again the same thing happened    

http://www.small-block-chevy.com/assemblyspec.html

Check this out it should help ya.  



Professional Hi-performance engine builder

kinda sounds like some weak bolts too.    what grade are they?    you might get lucky drilling them & using an "easy-out".    be careful though,....if you break the easy-out you'll play heck trying to drill it out.    a heli-coil is another option.  

If I remember right the instructions from Edelbrock say to torque the bolts to 30ftlbs. If you're breaking bolts you've got the wrong grade bolts. You need at least a grade 3 and I personally prefer grade 5.

+1 for careful drilling and easy out usage
Use the drill in one hand while holding the hose for the shop vac in the other, right next to the drill bit, sucking up any shavings that may try to get where they do not belong.

I have pulled threads out of iron heads trying to torque the intake to factory specs and had to use heli-coils too.  

the shop vac is a great idea scott.    i gotta be honest,...i rarely torque intake manifold bolts.   i just use a box wrench.    once i get the motor warmed up a few times, they need to be re-tightened anyway.   kinda like headers.   the torque pattern sequence on most engine parts is from the center first, working your way outwards.  

You should use sealer on the threads of the intake manifold bolts as well.  



Professional Hi-performance engine builder

Shaving cream in the ports and surrounding area works great for trapping shavings.,. suck everything up with a vacuum when done.
Proper torque is 25 ft lbs on 3/8" N.C. grade 5 bolts.
No idea what to torque junk bolts, but grade 5's will take 30 lbs, no problem.

 
When The Flag Drops,,,



The Bull Chit Stops,,,


P. Engineer, Engine Builder

torque junk bolts to the garbage can  

Absolutely true cuz those junkers cause too much grief, to even have around the shop.

 
When The Flag Drops,,,



The Bull Chit Stops,,,


P. Engineer, Engine Builder

It is always a good idea to buy new grade 5 intake bolts cheap insurance.  



Professional Hi-performance engine builder

Here is the torque sequence.
 



Professional Hi-performance engine builder

Hi there,
 Out here the Factory bolts cost more than the Milodon grade 8s
 A grade cannot be too high but the excess torque on the bolt can be.
 25 lbs dry or 22 lubed will do nicely...Good luck as it it an early
 stage of learning to learn the basics...Skyeking  
skyeking