How to adjust Pontiac pushrod and rocker arms?
Remove all of the slack out of the pushrod and rocker arms by slowly tightening the adjusting nut. You must use your sense of touch here. Lightly turn the rod with your fingers while tightening the nut. As you do so, you will begin to feel resistance. When the resistance makes it difficult for you to turn the rod without more grip (torque), stop!
How to adjust GM 3400 3.4L pushrod rocker arms?
Intake valves are closer to the valley of the engine. No compression on 3.4 V6 Aztec, replaced one cylinder head only but did remove push rods etc from both to replace gaskets, also turned the engine over without push rods good compression, left overnight still no compression any one have any ideas I am stumped. Lifters?
Where to find TDC on Pontiac rocker arms?
Locate TDC on #1 by locating the ‘0’ on the timing tab with the harmonic balancer line. You can determine whether it’s really the #1 cylinder a couple of ways. One way is too look at the hydraulic lifters. If the hydraulic lifters are down and level you’re on # 1 TDC. Another way is the old “thumb in the dike” method.
Can you adjust the rocker arms on a Chevy small block?
Answer: There is no special valve adjustments on this motor as was the case with the older Chevy small block. Rocker arms are just torqued to specs. The most important thing is that the push rods are installed correctly. They are different lengths.
Do you need to adjust rocker arms on a Pontiac?
Whether you have decided to stay with the stock type stamped rocker arms or Competition Cams Magnum Rollers Rockers as pictured here, or something far more exotic, you will need to adjust valve lash. Torquing the adjusting nut per the old Chilton’s to 20-25 ft pounds won’t work on any heads that have been milled.
Intake valves are closer to the valley of the engine. No compression on 3.4 V6 Aztec, replaced one cylinder head only but did remove push rods etc from both to replace gaskets, also turned the engine over without push rods good compression, left overnight still no compression any one have any ideas I am stumped. Lifters?
Where is the TDC on a Pontiac rocker arm?
Locate TDC on #1 by locating the ‘0’ on the timing tab with the harmonic balancer line. You can determine whether it’s really the #1 cylinder a couple of ways. One way is too look at the hydraulic lifters. If the hydraulic lifters are down and level you’re on # 1 TDC.
What should I know about the rocker arms?
Rocker arms are just torqued to specs. The most important thing is that the push rods are installed correctly. They are different lengths. GM recommends new lower intake bolts, and have updated the torque specs. On rocker arms and lower intake bolts. More Questions For… The intake and exhaust rocker / Pushrods are labeled in the picture below.
How to torque the rocker arms on a 3800pro?
Slowly thread the rocker bolts into the cylinder head. Be sure that the pushrods are correctly positioned into the pushrod seats (see figure 3). Torque rocker bolts to 25 foot pounds using fluid motion to avoid false torque readings. Continue to install each set of two rocker arms until you are complete.
Locate TDC on #1 by locating the ‘0’ on the timing tab with the harmonic balancer line. You can determine whether it’s really the #1 cylinder a couple of ways. One way is too look at the hydraulic lifters. If the hydraulic lifters are down and level you’re on # 1 TDC.
How do you thread a pushrod seat into a rocker?
· For adjustable rockers: Thread the pushrod seat all the way into the rocker. A 1/8” hex driver and a cordless drill in reverse will help speed up this process. After threading pushrod seats into rockers, use compressed air to blow off any aluminum shavings that may have appeared as a result of pushrod seat installation.
Remove all of the slack out of the pushrod and rocker arms by slowly tightening the adjusting nut. You must use your sense of touch here. Lightly turn the rod with your fingers while tightening the nut. As you do so, you will begin to feel resistance. When the resistance makes it difficult for you to turn the rod without more grip (torque), stop!
What was the rocker arm ratio for the Pontiac V-8?
Developed by Pontiac Engineer Clayton Leach, the V-8 used a simple ball-stud rocker arm that was very efficient and cost effective. A rocker arm ratio of 1.5:1 was used on most production engines. Early Super Duty and Ram Air IV engines used an identical rocker arm but with a 1.65:1 ratio to increase valve lift.
Slowly thread the rocker bolts into the cylinder head. Be sure that the pushrods are correctly positioned into the pushrod seats (see figure 3). Torque rocker bolts to 25 foot pounds using fluid motion to avoid false torque readings. Continue to install each set of two rocker arms until you are complete.
Developed by Pontiac Engineer Clayton Leach, the V-8 used a simple ball-stud rocker arm that was very efficient and cost effective. A rocker arm ratio of 1.5:1 was used on most production engines. Early Super Duty and Ram Air IV engines used an identical rocker arm but with a 1.65:1 ratio to increase valve lift.
Where to start the rocker arm adjustment process?
The best place to start the adjustment process is to begin with the #1 cylinder. Whether you are building a new motor, swapping in a cam, or adding other upper valve train components, start with the #1 cylinder. Silly as this may seem to some, the #1 cylinder is on the driver’s side cylinder bank.
How to use a shaker scoop on a pushrod?
When pushrod has no free play between the lifter and rocker arm, STOP! Turn the nut 1/2 turn further to preload the lifter. To use a shaker scoop from an Oldsmobile engine you will need to locate another shaker from a pontiac application.