What are the ideal leverage ratio for a rocker arm And why so?
Current automotive design favors rocker arm ratios of about 1.5:1 to 1.8:1. However, in the past smaller positive ratios (the valve lift is greater than the cam lift) and even negative ratios (valve lift smaller than the cam lift) have been used. Many pre-World War II engines use a 1:1 (neutral) ratio.
How tall should the pushrods be on a jeep?
Put cam lube on the lifter bases and lifter sides. When the engine starts, the lifters will fill quickly. Once the lifters establish zero valve lash, the lifter plungers will stay at that height within the lifters. Stock pushrod length for your engine is 9.640″-9.660″. 9.639″ should work just fine.
Why are my pushrods not working in my Jeep?
If the lifters are not “pumped up” with oil, there should be no coil bind or valve-to-piston interference. Again, your problem was likely caused by the lifters being full of oil before installation.
Do you Lube lifters before installing pushrods?
Lube only the lifter bases and sides of the lifter. If you fill the lifters with oil before installation, you will get too much valve lift at first engine start-up! This can cause valve spring coil bind, valve to piston interference and bent pushrods or valves. Let the engine’s oil system fill the lifters.
Can a stock pushrod be installed on a compcams lifter?
There is no change in lifter/pushrod height between stock lifters and CompCams lifters. The stock pushrods will also work fine if you have not machined the cylinder head or the block deck. The stock rocker arms can be installed by simply tightening the rockers in place properly with the pushrods aligned.
What’s the torque for pushrods and rocker arms?
Now that the cylinder heads are on, it’s time to install the push rods, rocker arms, and pedestals. The torque spec for the rocker arm bolts is 25 ft. Lbs. Now that the cylinder heads are on, it’s time to install the push rods, rocker arms, and pedestals. The torque spec for the rocker arm bolts is 25 ft. Lbs. Skip navigation Sign in Search
Put cam lube on the lifter bases and lifter sides. When the engine starts, the lifters will fill quickly. Once the lifters establish zero valve lash, the lifter plungers will stay at that height within the lifters. Stock pushrod length for your engine is 9.640″-9.660″. 9.639″ should work just fine.
If the lifters are not “pumped up” with oil, there should be no coil bind or valve-to-piston interference. Again, your problem was likely caused by the lifters being full of oil before installation.
There is no change in lifter/pushrod height between stock lifters and CompCams lifters. The stock pushrods will also work fine if you have not machined the cylinder head or the block deck. The stock rocker arms can be installed by simply tightening the rockers in place properly with the pushrods aligned.