Cadillac engine knowledge
(corrected the crank and head numbers and years) |
(formatting update) |
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Basic Engine Specifications | Basic Engine Specifications | ||
| − | Tune-up Specifications | + | Tune-up Specifications: |
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Year--Disp.-Fuel-Sparkplugs-Dist.-Timing BTDC-Intake opens-Idle speed | Year--Disp.-Fuel-Sparkplugs-Dist.-Timing BTDC-Intake opens-Idle speed | ||
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| − | General Specifications | + | General Specifications: |
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Year-Disp.-Fuel-Horsepower-Torque@RPM-BorexStroke-Comp. ratio | Year-Disp.-Fuel-Horsepower-Torque@RPM-BorexStroke-Comp. ratio | ||
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| − | Fastener Torque Specifications | + | Fastener Torque Specifications: |
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Year-Disp.-Head-Rod-Main-Crank damper-Flywheel-Intake-Exhaust | Year-Disp.-Head-Rod-Main-Crank damper-Flywheel-Intake-Exhaust | ||
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Identification: | Identification: | ||
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'68-'69 472: 1486238 | '68-'69 472: 1486238 | ||
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'70-'76 472 & 500: 1485200 | '70-'76 472 & 500: 1485200 | ||
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'77-'79 425: 1609110 | '77-'79 425: 1609110 | ||
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'80-'85 368: 1615255 Carb 1620734 EFI | '80-'85 368: 1615255 Carb 1620734 EFI | ||
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Crank Casting #: | Crank Casting #: | ||
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'68-'74 472: 1486424 | '68-'74 472: 1486424 | ||
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'70 500: 1495094 | '70 500: 1495094 | ||
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'71-'76 500: 1496793 | '71-'76 500: 1496793 | ||
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'77-'79 425: 1609142R | '77-'79 425: 1609142R | ||
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'80-'85 368: 1609142 | '80-'85 368: 1609142 | ||
| − | Stroke (stroke can be measured through spark plug hole if it will turn) | + | |
| + | Stroke: (stroke can be measured through spark plug hole if it will turn) | ||
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'68-'74 472, 77-'79 425, '80-'85 368: 4.060" (less than 4 1/8") | '68-'74 472, 77-'79 425, '80-'85 368: 4.060" (less than 4 1/8") | ||
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'70-'76 500: 4.300" (more than 4 1/4") | '70-'76 500: 4.300" (more than 4 1/4") | ||
| − | Head Casting Number (usually in the center of the head under the valve cover): | + | |
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| + | Head Casting Number: (usually in the center of the head under the valve cover): | ||
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'68-'69 472: 1486250 | '68-'69 472: 1486250 | ||
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'70 472 & 500: 1495950 | '70 472 & 500: 1495950 | ||
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'71-'73 472 & 500: 1497902 | '71-'73 472 & 500: 1497902 | ||
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'74-'76 472 & 500: 6024493, 6024552 | '74-'76 472 & 500: 6024493, 6024552 | ||
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472 and 500 heads have the last 3 digits of the # in a recess under a center intake port, visible from the lifter valley with a mirror. | 472 and 500 heads have the last 3 digits of the # in a recess under a center intake port, visible from the lifter valley with a mirror. | ||
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'77-'79 425: 1609112, 1609423 (last 3 usually on driver's front / pass. rear exhaust port) | '77-'79 425: 1609112, 1609423 (last 3 usually on driver's front / pass. rear exhaust port) | ||
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'80-'85 368: 1615188, others I don't know. The 4-6-8 head is substantially different than the regular head, and the rocker assemblies are not directly interchangeable. | '80-'85 368: 1615188, others I don't know. The 4-6-8 head is substantially different than the regular head, and the rocker assemblies are not directly interchangeable. | ||
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For Quick ID - on the second page, there is a box shape shown on the rear of the '77-later blocks to ID the smaller engines. Distinguishing a '70-newer 472 from a 500 can only be done by crank number, stroke, or piston design, as all other parts are the same. | For Quick ID - on the second page, there is a box shape shown on the rear of the '77-later blocks to ID the smaller engines. Distinguishing a '70-newer 472 from a 500 can only be done by crank number, stroke, or piston design, as all other parts are the same. | ||
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