Table of Contents
What is the torque on cylinder head bolts?
If an engine produces 1,500 pounds of pressure and the cylinder head has 8 bolts, then each bolt must be tightened to 187 foot-pounds of torque to secure the cylinder head to the block.
How do I know the torque spec of my engine?
Calculate Torque
- Fill your values into the equation T = K x U x D x P.
- Solve the equation T = 1.33 times 0.20 times 0.50 inches times 13,927 lb. The total is 1,852 inches lbs.RE. Reduce the value into ft-lb. You can do this by dividing your value by 12, the number of inches in a foot.
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 |
What is the torque specs for Chevy 350 heads?
Small Block Chevy Torque Specs
| Fastener Type | Torque Spec |
|---|---|
| Cylinder Head Bolts | 65 ft.-lbs. |
| Screw-In Rocker Arm Studs | 50 ft.-lbs. |
| Intake Manifold Bolts (Cast Iron Heads) | 30 ft.-lbs. |
| Oil Pump Bolt | 60-70 ft.-lbs. |
How do you calculate cylinder head torque?
Each cylinder head bolt creates only one part of the total amount of clamping force necessary to seal the cylinder heads to the engine block. To determine how much torque is needed for each bolt it is necessary to divide the number of bolts by the total amount of cylinder pressure the engine produces.
What is the torque spec?
Recommended torque specifications are unique for each type of vehicle. By definition, torque refers to the amount of rotational force at the point of application. When attaching a wheel to a vehicle, torque specifications are the amount of force recommended on the hardware to ensure proper installation.
Where do you find torque?
A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force. and the magnitude of the torque is τ = N m.
Do ARP head studs need to be torqued?
Do I need to re-torque my head bolts or studs? If you follow the ARP installation instructions, there should be no need to do a re-torque. However, it may be necessary under certain circumstances if the gasket manufacturer’s instructions require it, particularly if a fire ring has been installed.
What does the torque sequence mean on a cylinder head?
Torque sequence refers ro the pattern in which you tighten the bolts. The overall goal is to spread the torque evenly as you are tightening the bolts. Usually, you start at one bolt, and you work your way around in a circular pattern. Doing so ensures that your head won’t be warped during the tightening sequence.
Where can I find the latest torque specs?
Torque specs Find the most up-to-date torque spec listings in electronic format. FelPro-Only.com is your convenient source for advanced sealing information. It’s the place to learn and share “tricks of the trade,” find proper diagnosis and installation instructions, and enjoy easy access to parts reference.
What does torque mean on a head bolt?
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.