Durango 2WD V6-3.7L (2009)
Connecting Rod: 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.
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.
2. Use a wood or plastic scraper to clean the ring land grooves.
Piston and Connecting Rod - Inspection
INSPECTION
Check the connecting rod journal for excessive wear, taper, and scoring. See:
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: .
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.