Section 05 ENGINE (4-TEC)
Subsection 08 (ENGINE BLOCK)
Ring End Gap
RING END GAP mm (in)
NEW MINIMUM
RECTANGULAR
0.15 (.006)
TAPER-FACE 0.15 (.006)
OIL SCRAPER RING
0.15 (.006)
NEW MAXIMUM
RECTANGULAR 0.35 (.014)
TAPER-FACE
0.35 (.014)
OIL SCRAPER RING 0.30 (.012)
SERVICE LIMIT
ALL
1 (.04)
Measurepositionforringendgapintheareaof8
to 16 mm (.315 to.630 in) from top of cylinder.
NOTE: In order to correctly position the ring in the
cylinder, use piston as a pusher.
Using a feeler gauge, check ring end gap. Replace
ring if gap exceeds above described specified tol-
erance.
Installation
For installation, reverse the removal procedure.
Pay attention to the following details.
Install the oil scraper ring first, then the taper-face
ring with the word “TO” facing up, then the rect-
angular ring with the word “T” facing up.
A31C2NA
1
2
3
1. Rectangular ring
2. Taper-face ring
3. Oil scraper ring
CAUTION: Ensure that top and second rings are
not interchanged
NOTE: Use a ring expander to prevent breakage
during installation. The oil ring must be installed
by hand.
Check that rings rotate smoothly after installation.
Space the piston ring end gaps 120° apart and do
not align the gaps with the piston pin bore or the
thrust side axis.
A31C2OA
1
2
A
A
A
1. DO NOT align ring gap with piston trust side axis
2. DO NOT align ring gap with piston pin bore axis
A. 120°
smr2004-Complete Line Up 295
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