Identifying Chevy engines
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[[File:Sbc400balancer.jpg|thumb|300px|left|OEM 400 balancer. Note scalloped outer ring]] <br style="clear:both"/> | [[File:Sbc400balancer.jpg|thumb|300px|left|OEM 400 balancer. Note scalloped outer ring]] <br style="clear:both"/> | ||
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| + | ===Starter bolt hole location=== | ||
| + | Flywheels having two different diameters and tooth counts are used on Chevrolet small block V8, big block V8, and V6/90-degree engines: | ||
| + | *Large flywheels are 14" in diameter, and have 168 teeth on the starter ring gear. | ||
| + | *Small flywheels are 12-3/4" in diameter, and have 153 teeth on the starter ring gear. | ||
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| + | The difference in flywheel diameters requires two different starter noses. Starter noses used with the large diameter flywheel have two offset bolt holes. | ||
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| + | [[Image:Staggered_Chevy_starter.JPG|thumb|350px|left|Staggered bolt pattern for the large 168 tooth SBC flywheel/flexplate]] <br style="clear:both"/> | ||
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| + | The small diameter flywheel is 12-3/4" in diameter, and has 153 teeth. Starters for small flywheels have two bolt holes which are parallel to the back of the block. | ||
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| + | [[Image:Chevy_starter_1964.JPG|thumb|350px|left|Straight across bolt pattern for the small 153 tooth SBC flywheel/flexplate]] <br style="clear:both"/> | ||
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| + | Most Chevrolet blocks are drilled for both types of starters. If you are changing the diameter of your flywheel, you can convert your present starter to fit the new flywheel by installing the appropriate starter nose. | ||
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| + | {| | ||
| + | |[[File:Block starter pad.jpg|thumb|370px|Chevy starter bolt hole locations for 168 tooth (black circle) and 153tooth (red circle) flywheel/flexplates. Blue circled hole used by both]] | ||
| + | |[[File:STARTER_MOUNTING_HOLES_BLOCK_PASSENGER_SIDE.jpg|thumb|380px|Chevy starter bolt hole locations for 168T and 153T]] | ||
| + | |} | ||
===Big block=== | ===Big block=== | ||
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