General Data

Engine Type 90 Degree V6

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RPO VIN Code LF6 (X) L35 (W)

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Displacement

4.3L

262 CID

Bore

101.60 mm

4.000 in

Stroke

88.39 mm

3.480 in

Compression Ratio

--

9.2:1

Firing Order

--

1-6-5-4-3-2

Spark Plug Gap

1.24 mm

0.060 in

Oil Pressure (Minimum Hot)

41.4 kPa at 1,000 engine rpm (Minimum)

124.1 kPa at 2,000 engine rpm

165.4 kPa at 4,000 enigne rpm

6.0 psig at 1,000 engine rpm

18.0 psig at 2,000 engine rpm

24.0 psig at 4,000 enigne rpm

Lubrication System

Oil Capacity Without Filter Change

3.75 Liters

4 Qts.

Oil Capacity With Filter Change Add

0.398 Liters

0.42 Qts

Oil Pan

Engine Block Clearance Tolerance

0.254 mm

0.010 in (Maximum)

Cylinder Head

Surface Flatness

0.1016 mm

0.004 in (Maximum)

Exhaust Manifold

Surface Flatness

0.254 mm

0.010 in (Maximum)

Intake Manifold

Surface Flatness

0.254 mm

0.010 in (Maximum)

Cylinder Bore

Diameter

101.618-101.643 mm

4.0007-4.0017 in

Out-of-Round Production

.0127 mm (Maximum)

0.0005 in (Maximum)

Out-of-Round Service Limit

0.05 mm (Maximum)

0.002 in (Maximum)

Taper Production Thrust Side

0.012 mm (Maximum)

0.0005 in (Maximum)

Taper Production Relief Side

0.025 mm (Maximum)

0.001 in (Maximum)

Taper Service Limit

0.025 mm (Maximum)

0.001 in (Maximum)

Piston

Piston Bore Clearance-Production

.017-.05 mm

0.0007-0.002 in

Piston Bore Clearance-Service Limit

.609 mm (Maximum)

0.0024 mm (Maximum)

Piston Rings (End Gap Measured in Cylinder Bore)

Piston Compression Ring Groove Clearance-Production Top

0.508-1.524 mm

0.02-0.06 in

Piston Compression Ring Groove Clearance-Production 2nd

1.016-2.032 mm

0.04-0.08 in

Piston Compression Ring Groove Clearance-Service Limit

0.107 mm (Maximum)

0.0042 in (Maximum)

Piston Compression Ring Gap-Production Top

0.25-0.40 mm

0.010-0.016 in

Piston Compression Ring Gap-Production 2nd

0.46-0.66 mm (Maximum)

0.018-0.026 in (Maximum)

Piston Compression Ring Gap-Service Limit

1.524-0.88  (Maximum)

0.06-0.035 in (Maximum)

Piston Oil Ring Groove Clearance-Production

.508-0.17 mm

0.02-0.07 in

Piston Oil Ring Groove Clearance-Service Limit

.508-2.032 mm (Maximum)

0.02-0.08 in (Maximum)

Piston Oil Ring Gap-Production

.38-1.27 mm

0.015-0.050 in

Piston Oil Ring Gap-Service Limit

.23-1.65 mm (Maximum)

0.009-0.065 in (Maximum)

Piston Pin

Diameter

23.545-23.548 mm

0.9267-0.9271 in

Clearance in Piston-Production

.005-.0177 mm

0.0002-0.0007 in

Clearance in Piston-Service Limit

.025 mm (Maximum)

0.001 in (Maximum)

Fit in Connecting Rod

0.021-0.040 mm (Interference)

0.0008-0.0016 in (Interference)

Crankshaft

Crankshaft Journal-Diameter #1

62.199-62.217 mm

2.4488-2.4495 in

Crankshaft Journal-Diameter #2, #3

62.191-62.215 mm

2.4485-2.4494 in

Crankshaft Journal-Diameter # 4

62.179-62.203 mm

2.4479-2.4489 in

Crankshaft Journal Taper-Production

.007 mm (Maximum)

0.0003 in (Maximum)

Crankshaft Journal Taper-Service

0.0254 mm (Maximum)

0.001 in (Maximum)

Crankshaft Journal Out-of-Round-Production

0.005 mm (Maximum)

0.0002 in (Maximum)

Crankshaft Journal Out-of-Round-Service Limit

0.025 mm (Maximum)

0.001 in (Maximum)

Crankshaft Bearing Clearance-Production #1

.02-.508 mm

0.0008-0.0020 in

Crankshaft Bearing Clearance-Production # 2, # 3, #4

0.22-.635 mm

0.0010-0.025 in

Crankshaft Bearing Clearance-Service Limit #1

0.0254-0.05

0.0010-0.0020 in

Crankshaft Bearing Clearance-Service Limit #2, #3, #4

0.025-0.06 mm

0.0010-0.025 in

Crankshaft End Play

0.050-0.20 mm

0.002-0.008 in

Crankshaft Runout

0.025 mm

(Maximum)

0.001 in

Connecting Rod

Connecting Rod Journal Diameter

57.116-57.148 mm

2.2487-2.2497 in

Connecting Rod Journal Taper-Production

.00508 mm (Maximum)

0.0003 in (Maximum)

Connecting Rod Journal Taper-Service Limit

0.025 mm (Maximum)

0.001 in (Maximum)

Connecting Rod Journal Out-of-Round-Production

0.007 mm (Maximum)

0.0002 in (Maximum)

Connecting Rod Journal Out-of-Round-Service Limit

0.025 mm (Maximum)

0.001 in (Maximum)

Rod Bearing Clearance-Production

0.033-0.088 mm

0.0013-0.0035 in

Rod Bearing Clearance-Service Limit

0.025-0.076 mm

0.0010-0.0030 in

Rod Side Clearance

.15-0.43 mm

0.006-0.017 in

Camshaft

Journal Diameter

47.452-47.478 mm

1.8682-1.8692 in

End Play

0.0254-0.2286 mm

0.001-0.009 in

Lobe Lift Intake

7.26-7.36 mm

0.286-0.290 in

Lobe Lift Exhaust

7.42-7.52 mm

0.292-0.296 in

Balance Shaft

Front Bearing Journal Diameter

54.985-55.001 mm

2.1648-2.1654 in

Rear Bearing Journal Diameter

38.084-38.100 mm

1.4994-1.500 in

Rear Bearing Journal Clearance

0.0254-0.09144 mm

0.001-0.0036 in

Valve System

Valve Lifter

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Hydraulic Roller Type

Valve Rocker Arm Ratio

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1.50:1

Valve Lash

Net Lash No Adjustment

Face Angle

45 degrees

Seat Angle

46 degrees

Seat Runout

0.05 mm (Maximum)

0.002 in (Maximum)

Seat Width Intake

.89-1.52 mm

0.035-0.060 in

Seat Width Exhaust

1.575-2.362 mm

0.065-0.098 in

Stem Clearance Production Intake

.0279-0.069 mm

0.0011-0.0027 in

Stem Clearance Production Exhaust

.0279-0.069 mm

0.0011-0.0027 in

Stem Clearance Service Limit Intake

.0254 mm (Maximum)

0.001 in (Maximum)

Stem Clearance Service Limit Exhaust

0.0508 mm (Maximum)

0.002 in (Maximum)

Valve Spring Free Length

51.56 mm

2.03 in

Valve Spring Pressure Closed

338-374 N at 43 mm

76-84 lb at 1.78 in

Valve Spring Pressure Open

832-903 N at 32 mm

187-203 lb at 1.27 in

Valve Spring Installed Height Intake

45.2 mm

1.78 in

Valve Spring Installed Height Exhaust

45.2-43.43 mm

1.690-1.710 in

Valve Lift Intake

10.52 mm

0.414 in

Valve Lift Exhaust

10.87 mm

0.428 in