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Jeep Workshop Manuals | |
Grand Cherokee 2WD V6-3.7L (2008)Engine, Cooling and Exhaust > Engine > Cylinder Block Assembly > Piston, Engine > Component Information > Service and Repair > Procedures![]() Piston: Procedures Piston and Connecting Rod - Cleaning CLEANING CAUTION: DO NOT use a wire wheel or other abrasive cleaning devise to clean the pistons or connecting rods. The pistons have a Moly CAUTION: DO NOT remove the piston pin from the piston and connecting rod assembly. 1. Using a suitable cleaning solvent clean the pistons in warm water and towel dry. Piston and Connecting Rod - Inspection INSPECTION Check the connecting rod journal for excessive wear, taper, and scoring. See: Connecting Rod/Service and Repair/Procedures/Connecting Rod Bearing Check the connecting rod for signs of twist or bending. Check the piston for taper and out of round shape before it is fitted into the cylinder bore. See: Piston Fitting. Check the piston for scoring, or scraping marks in the piston skirts. Check the ring lands for cracks and/or deterioration. Piston Fitting PISTON FITTING 1. To correctly select the proper size piston, a cylinder bore gauge (2), capable of reading in 0.003 mm (.0001 in.) INCREMENTS is required. If a bore gauge is not available, do not use an inside micrometer. 2. Measure the inside diameter of the cylinder bore at a point 38.0 mm (1.5 inches) below top of bore (4). Start perpendicular (across or at 90 degrees) to the axis of the crankshaft at point A and then take an additional bore reading 90 degrees to that at point B. Engine, Cooling and Exhaust > Engine > Cylinder Block Assembly > Piston, Engine > Component Information > Service and Repair > Procedures | ||
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