262
CID (4.3L) ENGINES
SERVICE MANUAL NUMBER 25
7.
Install piston rings as follows:
a. Install oil ring spacer in groove and insert anti-rotation tang in oil hole.
b. Hold spacer ends together and install lower steel oil ring rail with gap properly lo-
cated.
c. Install upper steel oil ring rail with gap properly located.
d. Flex the oil ring assembly to make sure ring is not binding. If ring groove is causing
binding, remove with a fine cut file. If a distorted ring is causing binding, use a new
ring.
IMPORTANT: Use piston ring expander (91-24697) for compression ring installation.
e. Install lower compression ring with marked side up, using ring expander.
f.
Install top compression ring with marked side up, using ring expander.
Installation
IMPORTANT: Cylinder bores must be clean before piston installation. Clean with a
light honing, as necessary. Then clean with hot water and detergent wash. After
cleaning, swab bores several times with light engine oil and clean cloth, then wipe
with a clean dry cloth.
1.
2.
3.
Lubricate connecting rod bearings and install in rods and rod caps.
Lightly coat pistons, rings and cylinder walls with light engine oil.
With bearing caps removed, install connecting rod bolt guide (3/8-24) (J-5239) on con-
necting rod bolts.
IMPORTANT: Be sure ring gaps are properly positioned as shown.
g
e
f
b
b
c
a
d
72373
Ring Gap Location
a - Oil Ring Spacer Gap (Tang In Hole Or Slot Within Arc)
b - Oil Ring Gaps
c - 2nd Compression Ring Gap
d - Top Compression Ring Gap
e - Port Side
f - Engine Front
g - Starboard Side
4.
Install each connecting rod and piston assembly in its respective bore. Install with
connecting rod bearing tangs toward outside of cylinder block. Use piston ring
compressor to compress rings. Guide connecting rod into place on crankshaft journal
with connecting rod bolt guide. Use a hammer handle with light blows to install piston
into bore. Hold ring compressor firmly against cylinder block until all piston rings have
entered cylinder bore.
Index
Page 3A-82
90-861328--1 NOVEMBER 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 1262 CID, Mercury MerCruiser 262 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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