PISTON AND CONNECTING ROD ASSEMBLIES 13
Data and dimensions
Note: This information is given as a guide for personnel engaged on engine overhauls. The dimensions
which are shown are those which are mainly used in the factory. The information applies to all engines,
unless an engine type code is shown.
Pistons - Naturally aspirated engines:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Quadram" combustion bowl, controlled
expansion, inserted top ring groove
Diameter of bore for gudgeon pin . . . . . . . . . . . . . . . . . . . . . . 34,928/34,934 mm (1.3751/1.3754 in)
Height of piston above top face of cylinder block . . . . . . . . . . . . . . . . . . 0,14/0,36 mm (0.005/0.014 in)
Width of groove for top ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,57/2,59 mm (0.101/0.102 in)
Width of groove for second ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,55/2,57 mm (0.100/0.101 in)
Width of groove for third ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,03/4,06 mm (0.1587/0.1598 in)
Pistons - Turbocharged engines:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Quadram" combustion bowl, controlled expansion,
inserted top ring groove, reduced diameter top land
Diameter of bore for gudgeon pin . . . . . . . . . . . . . . . . . . . . . . . 38,103/38,109 mm (1.500/1.5004 in)
Height of piston above top face of cylinder block . . . . . . . . . . . . . . . . . . 0,14/0,36 mm (0.005/0.014 in)
Width of groove for top ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tapered
Width of groove for second ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,56/2,58 mm (0.1008/0.1016 in)
Width of groove for third ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,04/4,06 mm (0.1591/0.1598 in)
Pistons - Turbocharged AE, YE, AD* engines:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Fastram" combustion bowl, controlled expansion,
inserted top ring groove, high top ring groove
Diameter of bore for gudgeon pin . . . . . . . . . . . . . . . . . . . . . 39,7003/39,7009 mm (1.5355/1.5358 in)
Difference between height grades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,046 mm (0.0018 in)
Height of piston above top face of cylinder block . . . . . . . . . . . . . . . . . 0,38/0,50 mm (0.015/0.020 in)
Width of groove for top ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tapered
Width of groove for second ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,56/2,58 mm (0.1008/0.1016 in)
Width of groove for third ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,04/4,06 mm (0.1591/0.1598 in)
Piston cooling jets - Turbocharged engines:
Valve open pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178/250 kPa (26/36 lbf/in
2
) 1,8/2,6 kgf/cm
2
* 110 Ti and 135 Ti AD lists are fitted with pistons which are designed for use in emission controlled areas.
Some of these pistons are non-expansion controlled.
Perkins Phaser/1000 Series, April 1995 13A.15
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