Do you OIL main cap bolts?
Re: Main bearing cap bolts, oil or no oil? Loctite is not necessary on main cap bolts or head bolts. If they come lose you have other problems. Install them dry but put a bit of oil under the head of the bolt.
What are connecting rod bolts?
Connecting rod bolts are the securing link between the piston assembly and the crankshaft. The rod bolts, because of the need for great strength, are generally made of heat-treated ahoy steel. Fine threads with close pitch are used to give maximum strength and to permit secure tighting.
What happens when torque is applied to a head bolt?
The amount of torque applied to the head bolt accomplishes two things. First, it overcomes friction between the threads in the block and the bolt as well as friction between the cylinder head the underside of the bolt head.
What’s the correct torque angle for a main cap?
In torque angle, the first step is to establish an accurate starting point by applying a light torque to the bolt. With an LS engine inboard main cap bolt, for example, the first step is to torque each bolt to 15 ft.-lbs. At this low level, friction is not a major factor so the error induced by different lubes is minimal.
What’s the importance of pre load on bolts?
The desired bolt pre-load is very important and is a value created by the bolt manufacturer. For any bolt, the combination of the strength of its material, diameter, thread, and length all play important roles in establishing the proper fastener stretch.
How are main bearing cap bolts held down?
Main Bearing Cap Bolts The main caps secure the bearings that hold your crankshaft in place. Different engine designs (SBF, BBF, SBC, BBC, LS, Coyote, etc.) use different quantities of main caps, and those caps are held down by main bearing cap bolts.
What are the main caps on an engine?
The main caps secure the bearings that hold your crankshaft in place. Different engine designs (SBF, BBF, SBC, BBC, LS, Coyote, etc.) use different quantities of main caps, and those caps are held down by main bearing cap bolts.
What kind of head bolts do you use?
TTY head bolts are common on engines using aluminum heads and/or multi-layer steel head gaskets. While all bolts experience some amount of stretch during torquing, TTY bolts are engineered to stretch within a controlled “yield zone.”
What kind of main cap do I Need?
In addition, 2-bolt main caps are common, but 4-bolt mains and 6-bolt mains may be used in high-powered engines for extra strength. Whether you need complete sets of studs and cross-bolts for a new engine build, or just partial sets for upgrades and repairs, you can find the main cap fasteners you need at Summit Racing Equipment.