What do displacement callouts mean on a Pontiac?
Pontiac placed displacement callouts on each side of the block in 1968, and cast the last two digits of the displacement size into the center of the lifter valley. The “00” found on this block indicates that it’s a 400. Other examples include “50” or “55,” which indicate a 350 or 455, respectively.
What kind of paint does a Pontiac 389 use?
This Pontiac shade of silver blue was first used in 1966 and lasted through 1970. This is a car of pedigree so all of the finishes should be factory correct, especially the engine-block color. Therefore, this 389 should be repainted in the correct 1965 Pontiac blue paint color.
How big is the crankshaft on a Pontiac?
The stock Pontiac crankshaft is a durable and well-balanced unit. It features large counterweights and relatively large 2.25-inch-diameter connecting-rod journals. As stroke was added to increase displacement, main bearing diameter was increased to maintain sufficient crank pin overlap for adequate strength.
What is the casting number on a Pontiac Boss 429?
Here, the casting number-77 cylinder head stamping is clearly visible on the number-2 (front) exhaust port. Most years have the head casting number on the center exhaust ports. (Photo Courtesy Scott Tiemann) The Pontiac engines are street-oriented performance engines, while the Boss 429 and 426 Hemi are race-oriented engines used on the street.
What was the engine code for a 1970 Pontiac 455?
Back to the 1970 455. The engine code is 0521182 YH front of block and 9799140 on the rear of block. Head numbers need to be cleaned up in order to get a good reading. Back to the 1970 455. The engine code is 0521182 YH front of block and 9799140 on the rear of block.
Why was the Turbo removed from the Pontiac 455?
One reason that turbos had a temporary disappearance from the marketplace was that the turbo was a big “heat sink”, which affected the engine’s capabilities of passing the cold start emissions test cycle, which tended to delay getting the catalytic converter to get up to its fully-functional operating temperature.
Where does the oil go in a Pontiac engine block?
Oil is collected in a sump at the rear of the oil pan. It’s drawn in, pressurized, and dispersed by a positivedisplacement rotary pump that’s driven by the camshaft. The oil is filtered before it passes across the rear of the block and into a machined galley that runs parallel to the crankshaft on the left side.
What was the original displacement of the Pontiac V-8?
The stock Pontiac V-8 block evolved from its original displacement of 287 ci in 1955 to as much as 455 by 1970 without grossly deviating from its original external dimensions. Its robust main saddles and thick deck surface are among the many features designed to improve rigidity and durability.