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Old 02-04-2015, 11:33 AM   #47
JSeery
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Join Date: Nov 2012
Location: Wichita KS
Posts: 14,778
Default Re: Oil pan 59AB photos

See if any of this helps. This piston is from a 1948 59a engine, it is domed top, 3.188 +.040 (original 3.188 bored std .040 over).

From top edge of piston to bottom of longest part of skirt: 2.960
From top edge of piston to bottom of shortest part of skirt: 2.700 (not including notch)
Width of longest part of skirt: ~1.250
Width of shortest part of skirt: ~1.250
It is curved between these sections.
From top edge of piston to top of dome: ~.250

Starting a top edge of piston working down to shortest part of skirt (not including notch).
Top edge to top piston ring: .250
Top piston ring grove: .096
Top piston ring to second piston ring: .156
Second piston ring grove: .096
Second piston ring to third piston ring: .100
Third piston ring grove: .188
Third piston ring to top of piston pin: .268
Piston pin: .750
Bottom of piston pin to bottom piston ring: .170
Bottom piston ring grove: .183
Bottom piston ring to bottom of skirt: .440 (not including notch)

From Top edge of piston to center of piston pin: ~1.530
From center of piston pin to bottom of skirt: ~1.170
Piston Pin diameter: .750

These are measurements straight from a piston using calipers and include measuring errors I am sure!

Last edited by JSeery; 02-04-2015 at 10:01 PM.
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