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Specifications, Mechanical: Pistons

Fig 1: Piston Diameter

GLL102649

Courtesy of VOLVO CARS OF NORTH AMERICA.

Piston diameter (D)

Standard	B5244S/S2
C-marked 1........mm	82.980-82.990
D-marked 1........mm	82.990-83.000
E-marked 1........mm	83.000-83.010
1 The classification is marked on the top of the piston.

Fig 2: Calculating Running Clearance Of Piston

GLL102646

Courtesy of VOLVO CARS OF NORTH AMERICA.

Piston running clearance (example)

Measured cylinder diameter........	83.015 mm
Measured piston diameter........	82.995 mm
The piston running clearance is........	0.020 mm
The piston running clearance must be 0.010-0.030 mm.

Piston rings

Fig 3: Checking Piston Ring Axial Clearance

GLL108962

Courtesy of VOLVO CARS OF NORTH AMERICA.

Axial clearance

Upper compression ring........0.030-0.070 mm

Lower compression ring........0.030-0.070 mm

Oil control ring assembly........0.038-0.142 mm

Compression ring dimension

Upper........1.20 -0.010/-0.030 mm

Lower........1.50 -0.010/-0.030 mm

Dimension, three piece oil ring

Spring........1.51 0.020 mm

Rail........0.46 0.011 mm

Piston pin

Diameter........21.000 +0/-0.004 mm