What is the head bolt torque?
A crucial component of engine building is setting the torque on head bolts. Torque refers to how tight a bolt should be. When setting the torque, reliance on the specifications set by design engineers is vital. One essential tool you must have is a good quality torque wrench.
What are the torque specs for ARP head studs?
ARP Head Studs, Main Studs, Rod Bolts Torque and Stretch Specs
U.S. STANDARD TORQUE VALUES Recommended Torque to Achieve Optimum Preload (Clamping Force) | ||
---|---|---|
Fastener Tensile Strength | 170,000/180,000 PSI (1,171 Nmm2) | 220,000 PSI (1,515 Nmm2) |
Fastener Diameter | Torque ARP lube (ft-lbs) | Torque ARP lube (ft-lbs) |
1/4″ | 12 | 16 |
5/16″ | 24 | 32 |
Can you change head studs without removing head?
A good rule of thumb is when in doubt, yank it out. High-mileage engines or ones with cylinder pressure issues should have the cylinder head removed and checked, including decking, before installing a new head gasket. Think about studs as preventative medicine.
Do you use lock tight on head bolts?
Do NOT use Loctite on the nuts for the head studs or main studs. Always ensure that the threads are clean prior to applying any lube. When using Loctite, make sure you assemble the parts before the Loctite cures. You can use Loctite instead of ARP Ultra-Torque, but do not use them together.
What are the torque specs for valve cover bolts?
Proper torque for the valve cover bolts is between 50-100 in-lbs., which is about 8 ft-lbs for a maximum. If you have the gasket properly set, and proper torque on the valve cover bolts, you should not leak.
Head Bolt Torque Head bolt torque refers to the amount of rotational force that must be applied to the cylinder head bolts for a safe and secure connection either to the engine block or another cylinder head depending upon the engine. After the desired torque is reached, some bolts then require further rotation of a few degrees.
What are torque specifications?
Torque specifications are for dry threads only. The fastener threads should be free of oil, dirt, grit, corrosion, etc. The hardware should turn freely without binding when tightened by hand. It is important NOT to lubricate hardware threads or seats. The friction at which torque is measured against should come from the hardware seats.