SERVICE MANUAL NUMBER 25
262 CID (4.3L) ENGINES
7.
Measure cylinder walls for taper, out-of-round or excessive ridge at top of ring travel.
This should be done with a dial indicator or inside micrometer. Carefully work gauge up
and down cylinder to determine taper and turn it to different points around cylinder wall
to determine out-of-round condition. If cylinders exceed specifications, boring and/or
honing will be necessary.
a
b
b
a
72385
Cylinder Measurement
a - At Right Angle To Centerline Of Engine
b - Parallel to Centerline Of Engine
“Out Of Round” Equals The Difference Between “red a” and “red b”
Measurement At Top Of Cylinder Bore and
Measurement At Bottom Of Cylinder Bore
72386
72387
Measuring Cylinder Bore
with Telescope Gauge
Measuring Cylinder Bore
with Dial Indicator
8.
Check cylinder head gasket surfaces for warp with a machinist’s straight-edge and a
feeler gauge. Take measurements diagonally across surfaces (both ways) and straight
down center. If surfaces are warped more than .003 in. (0.07 mm) in a 6 in. area or .007
in. (0.2 mm) overall, block must be resurfaced by an automotive machine shop.
a
72910
b
a - Machinist’s Straight Edge
b - Feeler Gauge
Index
90-861328--1
NOVEMBER 1999
Page 3A-101
| 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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