CLASS RACER FORUM - View Single Post - torque-to-yield bolts query

Moparteacher · 10-31-2008, 01:25 AM

TTY fasteners are usually used where an aluminum part (cylinder head ) is being fastened. Aluminum expands and contracts greater than cast iron. This expansion requires a bolt that will stretch and retract while maintaining clamping force.

I doubt your 454 utilizes TTY bolts if it has iron heads. Are the heads iron?

10-31-2008, 01:25 AM	#2
Moparteacher Junior Member Join Date: Nov 2007 Location: Boise Posts: 49 Likes: 0 Liked 0 Times in 0 Posts	Re: torque-to-yield bolts query TTY fasteners are usually used where an aluminum part (cylinder head ) is being fastened. Aluminum expands and contracts greater than cast iron. This expansion requires a bolt that will stretch and retract while maintaining clamping force. I doubt your 454 utilizes TTY bolts if it has iron heads. Are the heads iron? __________________ Gary Weaver Moparteacher@yahoo.com