When did the 3 inch crankshaft come out for the Pontiac V-8?
The 3-inch unit was used in all V-8s up to 400 inches produced between 1959 and 1979. The 3.25-inch unit was introduced in the early 1960s for the 421, and is found in all other Pontiac engines displacing up to 455 ci.
What are the parts numbers on a Pontiac crankshaft?
Casting numbers can be used to identify most Pontiac crankshafts. Location varies, and I have found original Pontiac cranks without part numbers, some partially or fully stamped, and others with full numbers.
Where is the oil seal located on the crankshaft?
Additionally, the rear main seal can center itself over the rear crank snout, unlike the front cover where it actually seals against the damper pulley, not the crank. The OE method, installs the rear cover without the seal, then installs the seal, so positioning of the cover prior to the seal would be critical.
Can a cast crankshaft be removed from a Pontiac V-8?
About as much as .050 inch can be removed without compromising crankshaft rigidity. The limiting factor is availability of correctly undersized bearings. Beyond normal grinding and micropolishing of the journal surfaces, there isn’t much more that a cast Pontiac crank requires for use up to 600 hp, or slightly more.
How big is the crank seal on a Pontiac?
Now for those who are into measuring things and have the crankshaft available to them, the 3 inch main blocks have a crank sealing surface of approximately 3.188 inches. This would require the TIP-RM300 seal The 3.25 inch main bearing cranks have a sealing surface of 3.436 which would use the TIP-RM325.
What’s the difference between black and purple Pontiac seals?
The purple seal is our 3″ Viton ® Pontiac rear main seal and our black seal is our 3.25″ Viton ®Pontiac rear main seal. Our seals are made and designed by Pontiac Engine Builders and are the clear choice when you want the absolute best in oil control when rebuilding your Pontiac engine.
Which is the best gasket seal for Pontiac?
Made by Best Gasket company the GraphtiteTM rope seal is a cost effective solution to rear main seal leaks. It also works well with blocks whose seal grooves are not suited for the two piece rubber rear main seal such as blocks that have been align bored numerous times.
Which is the best rear mail seal for a Pontiac V-8?
The new BOP Engineering One-piece rear mail seal is the most advanced rear main seal on the market for the traditional Pontiac V-8.