Mercruiser 350 CID / 5.7L Gen + Marine Engine Specifications
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Unit Of Measurement
In. (mm)
Model |
350 CID / 5.7L |
Displacement
|
350 CID (5.7 Liter)
|
Bore
|
4.00(101.6)
|
Stroke
|
3.48(88.4)
|
Compression Ratio
|
9.4:1
|
Heads
|
Cast Iron
|
Intake Manifold
|
Cast Aluminum
|
Block
|
Cast Iron (2 Bolt Main Bearing Caps)
|
Rods
|
Powdered Metal
|
Crankshaft
|
Cast Iron
|
Pistons
|
Cast Aluminum
|
Camshaft
|
Steel
|
350 CID Gen + Engine Specifications
Unit Of Measurement
In. (mm)
NOTE: These specifications cover only Gen + engines.
CYLINDER BORE
Diameter |
4.0007-4.0017 (101.618-101.643) |
||
Out Of Round |
Production |
.0005(0.12) Max |
|
Service |
.002(0.05) Max |
||
Taper |
Production |
Thrust Side |
.0005(0.012) Max |
Relief Side |
.001(0.025) Max |
||
Service |
.001(0.025) Over Production |
PISTON CLEARANCE
Production |
.0007-.0021(0.018-0.053) Max |
Service |
.0027(0.068) Max |
PISTON RING: COMPRESSION
Groove Clearance |
Production |
Top |
.0012-.0032(0.030-0.081) |
2nd |
|||
Service |
High Limit Production + .001(0.025) |
||
Gap |
Production |
Top |
.010-.020(0.25-0.51) |
2nd |
.018-.026(0.46-0.66) |
||
Service |
High Limit Production + .010(0.25)
|
PISTON RING: OIL
Groove Clearance |
Production |
.002-.007(0.051-0.17) |
Service |
High Limit Production + .001(0.025)
|
|
Gap |
Production |
.010-.030(0.25-0.76) |
Service Limit |
High Limit Production + .001(0.25)
|
PISTON PIN
Diameter |
.9270-.9271(23.545-23.548) |
|
Clearance |
Production |
.0004-.0008(0.0120-0.0210) |
Service Limit |
.0040(0.025) Max |
|
Fit in Rod |
.0008-.0016(0.021-0.40) Interference |
CRANKSHAFT
Main |
Journal
Diameter
No. 1
2.4484-2.4493(62.189-62.212)
No. 2, 3, 4
2.4481-2.4490(62.182-62.205)
No. 5
2.4479-2.4488(62.177-62.199)
Taper
Production
.0002(0.005) Max
Service
.001(0.025) Max
Out of Round
Production
.0002(0.005) Max
Service
.001(0.005) Max
Main Bearing
Clearance
Production
No. 1
.0007-.0021(0.018-0.053)
No. 2, 3, 4
.0022-.00610(0.0009-0.0024)
No. 5
.00250-.00690(0.0010-0.0027)
Service
No. 1
.0010-.0020(0.250-0.510)
No. 2, 3, 4
.0010-.0025(0.0250-0.0640)
No. 5
.0025-.0035(0.0760-0.0380)
Crankshaft End Play
.002-.008(0.0500-0.2000)
Connecting Rod
Journal
Diameter
2.0978-2.0998(53.2840-53.3340)
Taper
Production
.0003(0.007) Max
Service
.001(0.025) Max
Out of Round
Production
.0003(0.007) Max
Service
.001(0.025) Max
Rod Bearing Clearance
Production
.0006-.0014(0.16-0.35)
Service
.0010-.0030(0.025-0.076)
Rod Side Clearance
.006-.014(0.15-0.35)
VALVE SYSTEM
Lifter Type |
Roller Hydraulic |
||
Rocker Arm Ratio |
1.50 to 1 |
||
Valve Lift |
Intake |
.431(10.947) |
|
Exhaust |
.450(11.43) |
||
Valve Lash (Intake & Exhaust) |
1 Turn Down from Zero Lash |
||
Face Angle (Intake & Exhaust) |
45° |
||
Seat Angle (Intake & Exhaust) |
46° |
||
Seat Runout (Intake & Exhaust) |
.002(0.05) Max |
||
Seat Width |
Intake |
.040-.0625(1.02-1.65) |
|
Exhaust |
.065-.098(1.65-2.49) |
||
Stem Clearance |
Production |
Intake |
.0010-.0027(0.025-0.069) |
Exhaust |
.0010-.0027(0.025-0.069) |
||
Service |
Intake |
High Limit Production + .001(0.025) |
|
Exhaust |
High Limit Production + .0002(0.050) |
VALVE SPRING
Valve Spring |
Free Length |
2.02(51.3) |
|
Pressure |
Valve Closed |
76-84 Lb. Ft.(338-374N) at 1.70(43.18) |
|
Valve Open |
187-203 Lb. Ft. (832-903 N) at 1.27(32.26) |
||
Installed Height |
Intake |
1.69-1.71(42.92-43.43) |
350 Gen + Engine Specifications
Unit Of Measurement
In. (mm)
|
CAMSHAFT
Lobe Lift + .002(0.051)
|
Exhaust |
.300(7.62) |
Intake |
.287(7.289) |
|
Duration at .050 In. (1.27 mm) Cam Lift |
Exhaust |
.294(7.467) |
Intake |
.307(7.797) |
|
Journal Diameter |
1.8682-1.8692(47.440-47.490) |
|
End Play |
.011-0.030(0.004-0.0012) |
|
Timing Chain Deflection [LH Rotation] |
.375(9.5) from taut position [total .75(19)] |
FLYWHEEL
Runout |
.008(0.203) Max |
CYLINDER HEAD
Gasket Surface Flatness |
.004(0.10) Overall Maximum |