Engine Specifications
GENERAL SPECIFICATIONS
| Application |
Specification |
| Displacement |
350 Cu. In. (5.7L) |
| Bore |
3.898" (99.00 mm) |
| Stroke |
3.622" (92.00 mm) |
| Compression Ratio |
| LS1 |
10.1:1 |
| LS6 |
10.5:1 |
CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS SPECIFICATIONS
| Application |
In. (mm) |
| Crankshaft |
| End Play |
.0015-.0078 (.04-.22) |
| Runout At Rear Flange (Maximum) |
.0020 (.050) |
| Main Bearings |
| Journal Diameter |
2.558-2.559 (64.993-65.007 ) |
| Journal Out-Of-Round |
| Standard |
.0001 (.003) |
| Wear Limit |
.0003 (.008) |
| Journal Taper |
| Standard |
.0004 (.010) |
| Wear Limit |
.0008 (.020) |
| Reluctor Ring |
| Runout |
.010 (.25) |
| Oil Clearance |
.0007-.0021 (.018-.054) |
| Connecting Rod Bearings |
| Journal Diameter |
2.0991-2.0999 (53.318-53.338) |
| Journal Out-Of-Round |
| Standard |
.0002 (.005) |
| Wear Limit |
.0004 (.010) |
| Journal Taper |
| Standard |
.0002 (.005) |
| Wear Limit |
.0004 (.010) |
| Oil Clearance |
.0009-.0025 (.023-.065 ) |
CONNECTING RODS SPECIFICATIONS
| Application |
In. (mm) |
| Bearing Bore Diameter |
2.224-2.225 (56.50-56.52) |
| Maximum Bend |
|
| Maximum Twist |
|
| Side Play |
.004-.020 (.11-.51) |
PISTONS, PINS & RINGS SPECIFICATIONS
| Application |
In. (mm) |
| Piston Clearance |
| Standard |
.0007-.0021 (.018-.054) |
| Wear Limit |
.0007-.0021 (.018-.054) |
| Pins |
| Diameter |
.9447-.9448 (23.997-24.000) |
| Rod Fit (Interference) |
.0008-.0017 (.020-.043) |
| Rings |
| No. 1 |
| End Gap |
.009-.015 (.23-.38) |
| Side Clearance |
.00157-.00335 (.040-.085) |
| No. 2 |
| End Gap |
.0017-.0025 (.044-.064) |
| Side Clearance |
.00157-.00315 (.040-.080) |
| No. 3 (Oil) |
| End Gap |
.0070-.0271 (.178-.688) |
| Side Clearance |
.0004-.0087 (.010-.220) |
CYLINDER BLOCK SPECIFICATIONS
| Application |
In. (mm) |
| Cylinder Bore |
| Diameter |
3.897-3.898 (99.000-99.018) |
| Taper (Thrust Side) |
.0007 (.018) |
VALVES & VALVE SPRINGS SPECIFICATIONS
| Application |
Specification |
| Valves |
| Face Angle |
45° |
| Margin (Minimum) |
.050" (1.25 mm) |
| Stem Diameter |
.313-.314" (7.955-7.976 mm) |
| Valve Springs |
| Free Length |
| Except LS6 |
2.08" (52.90 mm) |
| LS6 |
2.10" (53.40 mm) |
| Installed Height |
1.80" (45.75 mm) |
| Lbs. @ In. (N @ mm) |
| Valve Spring Pressure |
| Except LS6 |
| Valve Closed |
76 @ 1.80 (340 N @ 45.75) |
| Valve Open |
220 @ 1.32 (980 N @ 33.55) |
| LS6 |
| Valve Closed |
90 @ 1.80 (400 N @ 45.75) |
| Valve Open |
259 @ 1.28 (1150N @ 32.42) |
CYLINDER HEAD SPECIFICATIONS
| Application |
Specification |
| Valve Seats |
| Intake Valve |
| Seat Angle |
46° |
| Seat Width |
.040" (1.02 mm) |
| Exhaust Valve |
| Seat Angle |
46° |
| Seat Width |
.070" (1.78 mm) |
| Valve Guides |
| Stem-To-Guide Oil Clearance |
| Standard |
.0010-.0026" (.025-.066 mm) |
| Wear Limit |
.0037" (.093 mm) |
CAMSHAFT SPECIFICATIONS
| Application |
In. (mm) |
| End Play |
.001-.012 (.025-.305) |
| Journal Diameter |
2.164-2.166 (54.99-55.04) |
| Lobe Lift |
| 2000 |
| Intake |
.277 (7.04) |
| Exhaust |
.281 (7.13) |
| 2001 |
| LS1 |
| Intake |
.274 (6.96) |
| Exhaust |
.281 (7.13) |
| LS6 |
| Intake |
.306 (7.78) |
| Exhaust |
.306 (7.78) |