Adjusting rocker arms
1/9/12, 04:01 PM
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Adjusting rocker arms
ADJUSTING ROCKER ARMS:
This is the method for stud mount rollers
1. pick a cylinder you are going to do the pre-load on, only do one cylinder at a time.
2. rotate the engine clockwise and watch the exhaust valve at the cylinder you are working on. When the exhaust valve begins to open adjust that cylinders intake rocker arm.
3. To adjust: back off the intake rocker arm adjusting nut and remove any tension from the push rod. Wait a few minturs for teh hydraulic lifter to return to a neutral position.
4. Twist the intake push rod while tighten down the rocker arm. when you feel a slight resistance to the tightening of the push rod you are at "zero lash". Turn the adjusting nut down 1/2 to 3/4s of a turn from that point..the intake is now adjusted properally.
5. Continue to turn the engine watching the same intake valve/rocker arm you just adjusted. It will go full open then start to close. when it is almost closed stop and adjust the exhaust valve on that particular cylinder, loosen the adjusting nut on the exhaust rocker arm and follow the same steps has in 3 & 4 .
6. Both valves are adjusted on this cylinder and now you can move on to the next cylinder following the same procedure.
you may gets some valve train noise until the oil pressure stabilizes and the motor heats up to operating temp.
This the method for Pedestal mount rockers:
1. Begin by placing the new pedestal inserts/mounts (flat side down) into the fulcrum guide (you can use your stock ones or, if your set came with new ones, you can use the ones supplied with your rocker arms), with a dab of grease or molly lube on the bottom of the inserts and the bottom of the guides, and set the fulcrum guide with mounts onto the cylinder head. Insert your allen head bolt through the rocker arm make sure the pivot inside the rocker arm has the flat side up - toward the bolt head and squeeze a little molly lube on the roller tip of the rocker. Then put the rocker/bolt assembly through the pedestal mount and fulcrum guide and screw the bolt into the cylinder head - snugging each rocker finger tight as you go (make sure the pushrod stays in the cup at the end of the rocker. Repeat for all 16 roller rocker arms.
2. Once all 16 rocker arms are installed to snug, turn the engine over, clockwise to top dead center , and check the number 1 cylinder intake and exhaust valves. They should both be closed (you should be able to spin the pushrod). If they are not both closed the crankshaft will need to be rotated 360* to TDC to correctly start the torque-ing procedure.
3. With the engine at TDC, torque the number 1 intake, number 1 exhaust, number 4 intake, number 3 exhaust, number 8 intake, and number 7 exhaust rocker arms to 15 lb.ft. with a torque wrench.
4.Once torqued the pushrods should still be able to be rotated. If they will not rotate, the shims will have to be implemented. Begin with the thinnest shim and repeat the above procedure until the pushrods can be rotated without any end play. ( if your push rods are to short you need longer push rods)
5. Once these valves have been checked and the rocker arms adjusted, continue to the next set by rotating the crankshaft 360* and torqueing the number 3 intake, number 2 exhaust, number 7 intake and number 6 exhaust rocker arms in the same manner as the previous set.
6. Complete the torquing process by rotating the crankshaft an additional 90* and torque the number 2 intake, number 4 exhaust, number 5 intake, number 5 exhaust, number 6 intake, and number 8 exhaust rocker arms as above.
This is the method for stud mount rollers
1. pick a cylinder you are going to do the pre-load on, only do one cylinder at a time.
2. rotate the engine clockwise and watch the exhaust valve at the cylinder you are working on. When the exhaust valve begins to open adjust that cylinders intake rocker arm.
3. To adjust: back off the intake rocker arm adjusting nut and remove any tension from the push rod. Wait a few minturs for teh hydraulic lifter to return to a neutral position.
4. Twist the intake push rod while tighten down the rocker arm. when you feel a slight resistance to the tightening of the push rod you are at "zero lash". Turn the adjusting nut down 1/2 to 3/4s of a turn from that point..the intake is now adjusted properally.
5. Continue to turn the engine watching the same intake valve/rocker arm you just adjusted. It will go full open then start to close. when it is almost closed stop and adjust the exhaust valve on that particular cylinder, loosen the adjusting nut on the exhaust rocker arm and follow the same steps has in 3 & 4 .
6. Both valves are adjusted on this cylinder and now you can move on to the next cylinder following the same procedure.
you may gets some valve train noise until the oil pressure stabilizes and the motor heats up to operating temp.
This the method for Pedestal mount rockers:
1. Begin by placing the new pedestal inserts/mounts (flat side down) into the fulcrum guide (you can use your stock ones or, if your set came with new ones, you can use the ones supplied with your rocker arms), with a dab of grease or molly lube on the bottom of the inserts and the bottom of the guides, and set the fulcrum guide with mounts onto the cylinder head. Insert your allen head bolt through the rocker arm make sure the pivot inside the rocker arm has the flat side up - toward the bolt head and squeeze a little molly lube on the roller tip of the rocker. Then put the rocker/bolt assembly through the pedestal mount and fulcrum guide and screw the bolt into the cylinder head - snugging each rocker finger tight as you go (make sure the pushrod stays in the cup at the end of the rocker. Repeat for all 16 roller rocker arms.
2. Once all 16 rocker arms are installed to snug, turn the engine over, clockwise to top dead center , and check the number 1 cylinder intake and exhaust valves. They should both be closed (you should be able to spin the pushrod). If they are not both closed the crankshaft will need to be rotated 360* to TDC to correctly start the torque-ing procedure.
3. With the engine at TDC, torque the number 1 intake, number 1 exhaust, number 4 intake, number 3 exhaust, number 8 intake, and number 7 exhaust rocker arms to 15 lb.ft. with a torque wrench.
4.Once torqued the pushrods should still be able to be rotated. If they will not rotate, the shims will have to be implemented. Begin with the thinnest shim and repeat the above procedure until the pushrods can be rotated without any end play. ( if your push rods are to short you need longer push rods)
5. Once these valves have been checked and the rocker arms adjusted, continue to the next set by rotating the crankshaft 360* and torqueing the number 3 intake, number 2 exhaust, number 7 intake and number 6 exhaust rocker arms in the same manner as the previous set.
6. Complete the torquing process by rotating the crankshaft an additional 90* and torque the number 2 intake, number 4 exhaust, number 5 intake, number 5 exhaust, number 6 intake, and number 8 exhaust rocker arms as above.
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