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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 7.4L V8 - VIN [N] >> Engine Specifications >> Piston/Pin/Ring Specifications

Piston/Pin/Ring Specifications

PISTONS, PINS & RINGS SPECIFICATIONS

Application In. (mm)
Piston Clearance (1) .003-.004 (.08-.10)
Pins
Diameter .9269-.9271 (23.543-23.548)
Piston Fit .00025-.00035 (.0063-.0088)
Rod Fit .0013-.0021 (.033-.053)
Rings
No. 1
End Gap .010-.018 (.25-.46)
Side Clearance .002-.003 (.05-.07)
No. 2
End Gap .016-.024 (.41-.61)
Side Clearance .002-.003 (.05-.07)
No. 3 (Oil)
End Gap .015-.055 (.38-1.40)
Side Clearance .005-.006 (.127-.153)
(1) Maximum service limit is 005" (.13 mm).