Standard Procedure - Measuring Cylinder Bores - Jeep 2002 WJ Service Manual

WG
ENGINE BLOCK (Continued)
STANDARD PROCEDURE - MEASURING
CYLINDER BORES
NOTE: This must be done with engine completely
disassembled.
(1) Thoroughly clean all cylinder bores with appro-
priate cleaning solvent.
(2) Measure each cylinder at the three measuring
points shown (Fig. 13).
1 - MEASURING POINT OF CYLINDER BORE
2 - MEASURING POINT OF CYLINDER BORE
3 - MEASURING POINT OF CYLINDER BORE
1a - UPPER REVERSAL POINT OF #1 PISTON RING
Fig. 13 MEASURING CYLINDER BORES
(3) Using the three measurment point, measure
cylinder in the longitudinal and in the transverse
direction (Fig. 13).
(4) Use the measurment and table below to group
cylinder bores:
Standard size
Group code letter A
Group code letter X
Group code letter B
Wear limit in longitudinal
in transverse direction
Permissible variation of
cylinder shape (when
new)
1b - BOTTOM DEAD CENTER OF PISTON
1c - BOTTOM REVERSAL POINT OF OIL SCRAPER RING
1A - LONGITUDINAL DIRECTION
1B - TRANSVERSE PDIRECTION
ENGINE 9a - 27
88.0 mm
88.000-88.006 mm
88.006-88.012 mm
88.012-88.018 mm
0.020 mm
0.000-0.014 mm