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Internet Engines

  • In any case you have to understand that almost all Pontiac Engines are the same size.  The only way to differentiate the cubic inch size difference is with numbers.  Of course you could call some Small Crank Blocks, and the others Big Crank Blocks.

    • In any case you have to understand that almost all Pontiac E…
  • Here is the shot of the area of the block where the Production Number and Casting Code is located.  The Casting Code is Alphabetical and the Production Number is numerical.

    • Here is the shot of the area of the block where the Producti…
  • Here is a larger shot of the engine block.  The numbers in question are approx. 1/2 inch from the left hand side of the block - head mating surface in the upper right quadrant.

    • Here is a larger shot of the engine block. The numbers in q…
  • Here is a mid distance shot.  You can see in this case the Casting Code is above the Production Number.  Some blocks are above the number and some are below the number.  Depends upon year of manufacture and plant.

    • Here is a mid distance shot. You can see in this case the C…
  • Here is a complete shot of the cylinder head.  Now some heads from various years are exceptions to the last identification information.

    • Here is a complete shot of the cylinder head. Now some head…
  • In this case the Date Code and the Production Casting Number are under the Valve Cover.  Some times they are stamped where the center head bolt goes thru the head and the machining of the pad removes some of the information.

    • In this case the Date Code and the Production Casting Number…
  • Here is a closeup on the location of such numbers.  You can clearly see the Alpha Numerical Date Code and the Production Casting Number.

    • Here is a closeup on the location of such numbers. You can…
  • On this GTO Cylinder Head the Casting Code is on the outer Exhaust Port.  The number above the Casting Code is not indicative of the head.  The number that is important is the "77"

    • On this GTO Cylinder Head the Casting Code is on the outer E…
  • Here you can see the center of the Camshaft Tunnel.  In the very center you can see the Reinforcing Boss with the Rib going across it from 1 O Clock to 7 O Clock.  Sometimes you will see the last numbers of the engines displacement cast upon this area....

    • Here you can see the center of the Camshaft Tunnel. In the…