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Perkins Phaser Series - Page 64

Perkins Phaser Series
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13 PISTON AND CONNECTING ROD ASSEMBLIES
Piston rings - Naturally aspirated engines:
Top compression ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Barrel face, molybdenum insert, with
a chamfer at the top of the inner face
Second compression ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taper face, cast iron
Oil scraper ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coil spring loaded, chromium faced
Width of top ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,48/2,49 mm (0.097/0.098 in)
Width of second ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,48/2,49 mm (0.097/0.098 in)
Width of third ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,98/3,99 mm (0.1566/0.1571 in)
Clearance of top ring in groove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,08/0,11 mm (0.003/0.004 in)
Clearance of second ring in groove . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,06/0,09 mm (0.002/0.003 in)
Clearance of third ring in groove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,04/0,08 mm (0.002/0.003 in)
Gap of top ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,40/0,85 mm (0.016/0.033 in)
Gap of second ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,30/0,76 mm (0.012/0.030 in)
Gap of third ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,38/0,84 mm (0.015/0.033 in)
Piston rings - Turbocharged engines:
Top compression ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Barrel face, molybdenum insert, wedge
Second compression ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taper face, cast iron
Oil scraper ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coil spring loaded, chromium face
Width of top ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wedge
Width of second ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,48/2,49 mm (0.097/0.098 in)
Width of third ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,98/3,99 mm (0.156/0.157 in)
Clearance of top ring in groove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wedge
Clearance of second ring in groove . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,07/0,11 mm (0.003/0.004 in)
Clearance of third ring in groove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,05/0,08 mm (0.002/0.003 in)
Gap of top ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,35/0,80 mm (0.014/0.031 in)
Gap of top ring with internal step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,35/0,70 mm (0.014/0.028 in)
Gap of second ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,30/0,76 mm (0.012/0.030 in)
For second rings with outside step . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,40/0,85 mm (0.016/0.033 in)
Gap of third ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,38/0,84 mm (0.015/0.033 in)
13A.16 Perkins Phaser/1000 Series, April 1995

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