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Engine Codes - 304 V-8

Contributed By: Joe Schaefer

The six digit Engine Code is stamped on a metal tag on the front of the right Valve Cover.

1st Digit - Year

4- 1971

5- 1972

2nd & 3rd Digit - Month

4th Digit - Compression ratio

H- V8-304 2V Carb. 8.4:1

5th & 6th Digit - Month

Note: Odd engine size characteristics will be stamped to the upper half of the Engine Code Plate as follows:

B- 0.010" Oversize Cylinder Bore

C- 0.010" Oversize Camshaft Bores

M- 0.010" Undersize Main Bearings

P- 0.010" Undersize Wrist Pins

PM- 0.010" Undersize Wrist Pins and Main Bearings

References:

Parts Manual: W-1170-R2, Kaiser Jeep Corporation, 1967

Parts Manual: F-76072, AMC, Feb 1972

Parts Manual: F-75080, AMC, May 1980

Parts Manual: 89-81-374-084, AMC, May 1987