Sunday, January 1, 2012

Torque specs on an aluminum edelbrock intake for a 350 chevy moter?

Im installing a edelbrock perfomer/rpm intake on my chevy 350 small block and need to know the recommended torque settings. its a 1984-85 block|||I own a shop, and have been building engines for over 40 years. Intakes are kind of funny when it comes to torque spec's. According to my Chevrolet Factory Performance Guide, the spec's call for 30 ft. lbs. of torque working from the center bolts in a criss-cross fashion to the end bolts. Use thread sealer on clean bolts, and a drop or two of engine oil where the head of the bolts contact the intake. The intake gaskets will settle, and after sitting over night, go over them again with the torque wrench. Many mechanics use the three pound added torque to insure a good seal, but I have had engines that had to be gone over several times before they finally stopped leaking. If after you torque them they leak, then go 1/8 of a turn more, and this should fix it. Due to the sealer one must use, the torque that is called for (many times) will not seal it off, so just know you may have to go over them several times in order for them to seal good. I never use the end rubber seals, but use black RTV. I always run a bead on the ends that is about 1/4" tall, and 1/4" wide, and add an extra dob in the corners. Allow the RTV to skin over before installing the intake, and go over the bolts a couple of times to insure they settle down at 30 lbs. (at least) on the final torque of the bolts. Don't get in a hurry, and allow the RTV to cure good before you try running the engine. There is nothing worse than a leaking intake, so let it sit over night to insure the gaskets are mashed down as far as they are going to go, and you won't have any leaks. Also; It's a good idea to clean the bolts good, as well as chase out the bolt holes, or you will get false torque readings. Sometimes the end bolts will be shorter than the rest, so make sure none of them are bottoming out, and not tightening all the way down.


Glad to help out, Good Luck!!!|||Edelbrock calls for 25 ft lbs, but 25-30 ft lbs will work just fine.





Like others side, start in center and work outwards criss crossing.|||30ft lbs. going from center out so you have equal distribution on the gaskets.|||33lbs

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