496
CID (8.1L)
SERVICE MANUAL NUMBER 30
Inspection
1.
2.
Inspect cylinder heads for cracks in exhaust ports, water jackets and combustion cham-
bers (especially around spark plug holes and valve seats). Replace cylinder heads if any
cracks are found.
Inspect cylinder head gasket surface for burrs, nicks, erosion or other damage. Also
check flatness of cylinder head gasket surface using a machinist’s straight edge and
feeler gauges. Flatness should be checked diagonally and straight down the center of
the head.
a
c
72566
b
a - Straight Edge
b - Feeler Gauge
c - Measurement Lines
IMPORTANT: Cylinder head-to-block gasket surface should be resurfaced if warped
more than specified. When head resurfacing is required, cylinder head-to-intake
manifold gasket surface on head must be milled to provide proper alignment
between intake manifold and head.
3.
Inspect valves for burned heads, cracked faces or damaged stems.
b
a
76777
76776
a - Cracked And Pitted Face
b - Damaged Stems
4.
Inspect rocker arm nuts and push rod guides for wear and damage.
Page 3A-32
INDEX
90-863161 SEPTEMBER 2000
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 496 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(2 votes, average: 4 out of 4)
Marine readers have rated Mercury MerCruiser 496 CID 8.1L Gasoline Marine Engines Service Manual Number 30 4.0 out of 4.0 based on 2 product reviews. How many openings for crankcaseventilation is there on
Merc 496 HO ?
Great down load . it was all there an more