RAM 3500 Truck 2WD V10-8.0L VIN W (1997)
Piston: Service and Repair
Fitting Pistons
GENERAL INFORMATION
Piston and cylinder wall must be clean and dry. Specified clearance between the piston and the cylinder wall is 0.013 - 0.038 mm (0.0005 - 0.0015
inch). Piston diameter should be measured at the top of skirt, 90° to piston pin axis. Cylinder bores should be measured halfway down the cylinder
bore and transverse to the engine crankshaft center line.
NOTE: Pistons and cylinder bores should be measured at normal room temperature, 21°C (70°F).
PROCEDURE
1. To correctly select the proper size piston, a cylinder bore gauge, capable of reading in 0.0001 inch INCREMENTS is required. If a bore gauge is
not available, do not use an inside micrometer.
2. The coating material is applied to the piston after the final piston machining process. Measuring the outside diameter of a coated piston will not
provide accurate results. Therefore measuring the inside diameter of the cylinder bore with a dial Bore Gauge, is MANDATORY. To correctly
select the proper size piston, a cylinder bore gauge capable of reading in 0.0001 inch increments is required.
3. Piston installation into the cylinder bore require slightly more pressure than that required for non-coated pistons. The bonded coating on the piston
will give the appearance of a line-to-line fit with the cylinder bore.
