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threaded stud and the zero mark on the front. Place SERVICE PROCEDURES PISTONS Pistons are machined to two different weight spec- ifications and matched to rods based on weight. All FITTING PISTONS Piston and cylinder wall must be clean and dry. Piston diameter should be measured 90 degrees to der bores should be measured halfway down the cyl- Chart. Pistons and cylinder bores should be measured at normal room tempera- CYLINDER BORE AND PISTON SPECIFICATION CHART ENGINE STANDARD CYLINDER BORE MAXIMUM OUT-OF-ROUND MAXIMUM TAPER STANDARD PISTON SIZE 3.5L 96.0 mm 6 0.0076 mm (3.780 in. 6 0.0003 in.) 0.076 mm 0.051 mm 95.980 6 0.019 mm (3.7788 6 0.0008 in.) Piston to Bore Clearance: -0.007 to +0.047 mm (-0.0003 to 0.0018 in.) Measurement taken at Piston Size location. Fig. 5 Testing Valve Spring with Tool C-647 300M 3.5L ENGINE 9 - 19 DIAGNOSIS AND TESTING (Continued) |