454
CID (7.4L) / 502 CID (8.2L)
SERVICE MANUAL NUMBER 23
Valve Springs - Checking Tension
IMPORTANT: Springs should be replaced if not within 10 lb. (44 N) of specified
tension.
b
a
72308
a - Valve Spring Tester (J-8056)
b - Torque Wrench
Valve Seat Repair
Valve seat reconditioning is very important, since seating of valves must be perfect for
engine to deliver maximum power and performance.
Another important factor is valve head cooling. Good contact between each valve and its
seat in head is important to ensure that heat in valve head will be properly dispersed.
Several different types of equipment are available for reseating valve seats. Equipment
manufacturer’s recommendations should be followed carefully to attain proper results.
a
b
d
c
50668
Typical “3 Angle” Valve Seat
a - Top Angle (30°)
b - Seat Angle (46°)
c - Bottom Angle (60°)
d - Seat Width
Intake - .060-.090 in. (1.52-2.29 mm)
Exhaust - .060-.090 in. (1.52-2.29 mm)
Index
Page 3A-44
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 |
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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...