Durango 2WD V8-5.7L Hybrid (2009)
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 coating,
this coating must not be damaged.
1. Using a suitable cleaning solvent, clean the pistons in warm water and towel dry.
2. Use a wood or plastic scraper to clean the ring land grooves.
CAUTION: Do not remove the piston pin from the piston and connecting rod assembly.
Piston and Connecting Rod - Inspection
INSPECTION
Check the connecting rod journal for excessive wear, taper and scoring.See: Connecting Rod/Service and Repair/Procedures.
Check the connecting rod for signs of twist or bending.
Check the piston for taper and elliptical shape before it is fitted into the cylinder bore. See: Connecting Rod/Service and Repair/Procedures.
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 (0.0001 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 (1) and then take an additional bore reading 90 degrees to that at point B (1).
3. The coated pistons will be serviced with the piston pin and connecting rod pre-assembled. The piston-rod assembly is specific for the left cylinder
bank (odd numbered) and the right cylinder bank (even numbered) and must not be interchanged.