SERVICE MANUAL NUMBER 23
454 CID (7.4L) / 502 CID (8.2L)
7.4L
MPI (L-29) Engine Specifications (Continued)
VALVE SYSTEM
MODEL
7.4L
Lifter
Hydraulic Roller
1.70 to 1
Rocker Arm Ratio
Face Angle (Intake & Exhaust)
Seat Angle (Intake & Exhaust)
Seat Runout (Intake & Exhaust)
45°
46°
.002 (0.05) Max
.0300-.0600 (0.7620-1.5240)
.0600-.0950 (1.5240-2.4130)
.0010-.0029 (0.0254-0.0737)
.0012-.0031 (0.0300-0.0787)
.0037 (0.0939)
Intake
Seat Width
Exhaust
Intake
Production
Service
Exhaust
Intake
Stem
Clearance
Exhaust
.0049 (0.1244)
Valve Lash (Intake and Exhaust)
Net Lash
CYLINDER HEAD
MODEL
7.4L
.004
(0.076)
(0.1016) Overall Maximum .003
within a 6 in. (152 mm) Span
Gasket Surface Flatness
MODEL
7.4L
.284 (7.214)
.282 (7.163)
209°
Exhaust
Intake
Lobe Lift ± .020 (0.051)
Exhaust
Intake
Duration at .050 In. (1.27mm) Cam Lift
Journal Diameter
209°
1.9482-1.9492
(49.485-49.509)
Journal Out Of Round
Camshaft Runout
.001 (0.025) Max
.002 (0.051) Max
.375
(9.5) from taut position
[Total .75 (19)]
Timing Chain Deflection
Index
90-861326--1 MARCH 1999
Page 3A-15
| 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...