Dodge dakota 2002 Service Manual page 1302

DR
PISTON RINGS (Continued)
PISTON RING SIDE CLEARANCE
NOTE: Make sure the piston ring grooves are clean
and free of nicks and burrs.
(5) Measure the ring side clearance as shown (Fig.
56)make sure the feeler gauge fits snugly between
the ring land and the ring. Replace any ring not
within specification.
Fig. 56 Measuring Piston Ring Side Clearance
1 - FEELER GAUGE
(6) Rotate the ring around the piston, the ring
must rotate in the groove with out binding.
PISTON RING SPECIFICATION CHART
Ring Position
Clearance
Upper Ring .051-.094mm
(0.0020- .0037
Intermediate 0.04-0.08mm
Ring
(0.0016-0.0031
Oil Control Ring .019-.229mm
(Steel Rails) (.0007-.0090
Ring Position Ring Gap
Upper Ring 0.20-0.36mm
(0.0079-0.0142
Intermediate 0.37-0.63mm
Ring
(0.0146-0.0249
Oil Control Ring 0.025-0.76mm
(Steel Rail) (0.0099- 0.03
(7) The No. 1 and No. 2 piston rings have a differ-
ent cross section. Ensure No. 2 ring is installed with
manufacturers I.D. mark (Dot) facing up, towards top
of the piston.
NOTE: Piston rings are installed in the following order:
• Oil ring expander.
• Upper oil ring side rail.
• Lower oil ring side rail.
• No. 2 Intermediate piston ring.
• No. 1 Upper piston ring.
ENGINE - 3.7L
Groove Maximum
Clearance
0.11mm
(0.004 in.)
in.)
0.10mm
(0.004 in.)
in.)
.25mm
(0.010 in.)
in.)
Wear Limit
0.43mm
(0.0017 in.)
in.)
0.74mm
(0.029 in.)
in.)
1.55mm
(0.061 in.)
in.)
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