454
CID (7.4L) / 502 CID (8.2L)
SERVICE MANUAL NUMBER 23
5.
Thoroughly clean valve guides with valve guide cleaner.
a
72564
a - Valve Guide Cleaner (J-8101)
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 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 as shown. Refer to “Specifications.”
a
c
72566
b
a - Straight Edge
b - Feeler Gauge
c - Take Both Measurements Diagonally Across Head (Both Ways) And Straight
Down Center Of The Head
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.
4.
Inspect valves for burned heads, cracked faces or damaged stems.
Inspect rocker arm bolts and push rod guides for wear and damage.
Index
Page 3A-42
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...