How to adjust intake valves on a Pontiac?
Rotate crankshaft 180 degrees clockwise and adjust intake valve on #1 and #8; exhaust valves #3 and #6. Rotate crankshaft 180 degrees again (TDC) and adjust intake valves #3 and #4; exhaust valves #5 and #7. Rotate crankshaft again 180 degrees and adjust intake valves #5 and #6; exhaust valves #1 and #2.
How do you set the valve lash on a Pontiac?
Use a feeler gauge, set to the correct valve lash, and place it between the tip of the valve stem and rocker arm. Adjust until you arrive at the proper setting and lock the adjuster in place. 4. After the intake valve has been adjusted, continue to rotate the engine, watching that same intake valve.
What kind of valve stem seal does Pontiac use?
Pontiac Valve Stem Sealing We get many questions regarding the intake seal styles on cast iron and aftermarket heads. Pontiac factory cast iron heads came with different styles of sealing such as valve stem o-rings and positive locking valve stem seals.
Do you need to adjust the valve on a GM 6 cylinder engine?
This is a critical, often overlooked part of the tune up of your old GM 6-cylinder engine and it can make a world of difference in how that worn-out engine runs – you may find after doing this adjustment that your old StoveBolt runs so well you decide to ignore the smoking and just run it as is for another 20 years.
Rotate crankshaft 180 degrees clockwise and adjust intake valve on #1 and #8; exhaust valves #3 and #6. Rotate crankshaft 180 degrees again (TDC) and adjust intake valves #3 and #4; exhaust valves #5 and #7. Rotate crankshaft again 180 degrees and adjust intake valves #5 and #6; exhaust valves #1 and #2.
Where are the exhaust valves on a Pontiac?
Number 1 piston at Top Dead Center (TDC) on compression stroke. Adjust intake valve on #2 and #7;exhaust valves #4 and #8. Rotate crankshaft 180 degrees clockwise and adjust intake valve on #1 and #8; exhaust valves #3 and #6. Rotate crankshaft 180 degrees again (TDC) and adjust intake valves #3 and #4; exhaust valves #5 and #7.
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.
What kind of valvetrain does a Pontiac V-8 have?
The Pontiac V-8 valvetrain is a simple overhead-valve design that’s comprised of several different components. Each cylinder uses one intake and one exhaust valve that allows the engine to ingest and expel the combustible air/fuel mixture and spent exhaust gasses.