What is the torque for 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.
What are the torque specs for head gasket?
Torque all bolts to 45-55 ft. lbs. (61-75 Nm.). Finally, tighten all bolts and studs an additional 1/4 turn (85-95°).
Should bolts be lubricated before torquing?
So, torque isn’t the true measure of bolt tightness—it’s tension. But lubrication on the bolt threads—and a whole host of other factors—can cause fluctuation in torque readings. So once you add a lubricant of any kind to the threads, all bets are off as to whether the same torque setting will truly secure the bolt.
How do you find the torque spec of a car?
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 torque should crank bolts be?
Got Torque?
| Bottom Bracket | ||
|---|---|---|
| Bottom bracket cups | 300-360 lb/in (32.9-40.7 Nm) | |
| Crank bolts | Bontrager | |
| Sport cranks with a single M8 bolt on each arm | 336-372 lb/in (38- 42 Nm) | |
| Big Earl cranks with a single M12 bolt on each arm | 384-420 lb/in (43.4-47.4 Nm) |
How do you sequence torque?
Tightening sequence The first pass, lightly tighten the first bolt then move directly across or 180 degrees for the second bolt, then move1/4 turn around the circle or 90 degrees for the third bolt and directly across for the fourth. Continue this sequence until all bolts are tightened.