What are the torque specs for a Chevy 350 engine?
Low-End Torque Specs. Main-cap torque specification on the typical Chevrolet 350 two-bolt-main engine is 70 ft.-lbs. Specifications for the four-bolt-main are 70 ft.-lbs for the inner bolts, 65 ft.-lbs for the 7/16-inch outer bolts, and 40 ft. lbs. for the 3/8-inch outer bolts.
What happens if you over tighten the torque on a Chevy 350?
If you over-tighten, the bolt threads can be severely damaged and you risk breaking a bolt off inside the head. The heads require the correct torque and tightening sequence to prevent damage to the head gasket. Again, if you over-tighten them, the bolts may be broken off inside the block.
What is the head bolt torque sequence for a small block Chevy?
Small Block Chevrolet Head Bolt Torque Sequence Another EZ Read reference. This is the Head Bolt Torque Sequence (Pattern) for the Small Blocks, Mouse Motors or what ever you might lovingly call this motor. I have not had a lot of vehicles with Small Block Chevy’s other then my engine swap 372″ Motor I put into my International Scout.
What should the torque be on a 351 engine?
The main bearings on the 351 engine are torqued to between 95 and 105 lb-ft-you’re going to need a good angle as well as a good grip on the torque wrench to hit that accurately. It should also be done in three steps. The other two engines aren’t as beefy, so they only get torqued to between 60 and 70, with two steps.
What are the torque specs for Chevy 350 head bolts?
It’s best to first tighten all the bolts to 25 foot-pounds, then 45 foot-pounds and finally 65 foot-pounds to maintain uniform pressure across the head. In addition, engine oil or some other lubricant should be applied to the bolts in blind holes, and sealant should be applied to any bolts that penetrate the water jacket.
What are the torque specs on my new aluminum heads?
Discussion in ‘ Engine Topic ‘ started by mainejohn, Jan 1, 2011 . so what are the torque specs on my new aluminum heads? all the bolts have sealer paste on them, do i also use some lube on the bolts and washers to get correct torque specs? It would be best to ask the head and/or bolt manufacturer this question.
What is the torque sequence for a small block Chevy?
EZ Read simple diagram of the Small Block Chevy Cylinder Head Torque Sequence Small Block Chevrolet Head Bolt Torque Sequence Another EZ Read reference. This is the Head Bolt Torque Sequence (Pattern) for the Small Blocks, Mouse Motors or what ever you might lovingly call this motor.
What are the torque specs for SBC engines?
Intake manifold bolts and head studs/bolts have to be torqued in a certain pattern and to a certain torque spec in order for your engine to work properly. Intake manifold bolts on SBC engines should be torqued to 30 lb-ft in a two-step sequence.