SERVICE MANUAL NUMBER 30
496 CID (8.1L)
496
CID (8.1L) Engine Specifications (Continued)
VALVE SYSTEM
Model
496 CID / 8.1 L
Lifter
Hydraulic, Roller Followers
Rocker Arm Ratio
1.70:1
Face Angle (Intake & Exhaust)
Seat Angle (Intake & Exhaust)
Seat Runout (Intake & Exhaust)
45
46
.002 in. (.050 mm) (max)
.03-.06 in. (.800-1.200 mm)
.06 - .095 in. (1.651 - 2.159 mm)
.001 - .0029 in. (.025 - .074 mm)
.0012 - .0031 in. (.030 - .079 mm)
*
Intake
Exhaust
Intake
Seat Width
Production
Exhaust
Intake
Stem
Clearance
Service
Exhaust
*
.3715
(9.436
.3713
- .3722 in.
- 9.454 mm)
- .3720 in.
- 9.449 mm)
*
Intake
Stem Diameter
Exhaust
(9.431
Valve Margin (Intake and Exhaust)
Valve Lash (Intake and Exhaust)
*
VALVE SPRING
Model
496 CID / 8.1 L
Free Length
2.1929 in. (55.70 mm)
Closed at 1.838
in. (46.680 mm)
58
- 64 lb (267 - 293 N)
- 207 lb (840 - 920 N)
Valve
Spring 1
Pressure
Open at 1.34 in.
189
(33.980
mm)
Installed Height
Free Length
1.838 - 1.869 in. (46.680 - 47.479 mm)
*
Damper or
Damper
Shield
Approximate Number Of
Coils
*
Damper or
Damper
Shield
Valve Spring Fit in Damper
Shield
*
*
Not available at time of printing.
90-863161 SEPTEMBER 2000
INDEX
Page 3A-9
| 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