POWERHEAD
90-855347R1 JANUARY 1999 Page 4A-43
6. Install new piston pin lockrings (one each end of piston pin) with Lockring Installation
Tool (91-77109A1).
7. Make sure lockrings are properly seated in piston grooves.
51086
51086
a
a
b
a-Lockring Installation Tool (91-77109A1)
b-Lockring
Piston and Piston Ring Combinations
153 CU. IN. (2508 cc) MODELS
All 153 cu. in. (2508 cc) models have two half keystone (half tapered) rings.
Pistons with two half keystone (half tapered) rings
0.056 in. (1.4 mm)
0.056 in. (1.4 mm)
a
b
a-Half Keystone (half tapered) Piston Ring
b-Enlarged View of Piston Ring Grooves
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