SPECIFICATIONS

Width of oil control ring
. .2.470 to 2.490 mm ((0.09724 to 0.09803 inch))
The clearance between a new oil control ring and
the groove in a new piston
. . . 0.015 to 0.05 mm ((0.00059 to 0.00197 inch))
Ring gap
. .0.050 to 0.090 mm ((0.00197 to 0.00354 inch))
Note: When you install a new oil control ring, make
sure that the word “TOP” is facing the top of the
piston. New oil control rings have a red identification
mark. The identification mark must be on the left of
the ring end gap when the top piston ring is installed
on an upright piston. The oil control ring is a two-
piece ring that is spring loaded. A pin is used in order
to hold both ends of the spring of the oil control ring in
position. The ends of the spring of the oil control ring
must be installed opposite the end gap of the oil
control ring.
Note: Ensure that the ring end gaps of the piston
rings are spaced 120 degrees from each other.
Piston
Note: An arrow which is marked on the piston crown
must be toward the front of the engine.
Illustration 55 g02659840
Typical example
(4) Piston
(5) Cylinder bore
Measure the piston height above the cylinder block.
Refer to Systems Operation, Testing and Adjusting,
“Piston Height - Inspect” for the correct procedure.
Refer to table 7 to select the correct gasket.
Table 7
Piston Height (A) Engine Gasket Thickness (B)
0 to 0.07 mm
(0 to 0.00276 inch)
0.80 mm (0.03150 inch)
0.08 to 0.22 mm
(0.00315 to 0.00866 inch)
0.70 mm (0.02756 inch)
Width of top groove in the piston
. . . . . . . . . . . . . . . . . . . . . . 2.21 mm ((0.08701 inch))
Width of second groove in new piston
. . . . . . . 2.05 to 2.07 mm ((0.08071 to 0.08150 inch))
Width of third groove in new piston
. . . . . . . 2.54 to 2.56 mm ((0.10000 to 0.10079 inch))
Piston pin
Diameter of a new piston pin
. . . . . . . . . . . . . . . . . . . . . . . 35.996 to 35.999 mm
((1.41716 to 1.41728 inch))
UENR0622-02 37
Specifications Section
This document has been printed from SPI2. NOT FOR RESALE