General

• Engine Type

In-Line-6

• Displacement

4.2L

256 cu in

• RPO

LL8

• VIN

"S"

• Bore

93 mm

3.66 in

• Stroke

102 mm

4.02 in

• Compression Ratio

10.3:1

• Engine Compression Test

1482 KPa

215 psi

• Firing Order

1-5-3-6-2-4

• Spark Plug Gap

1.07 mm

0.042 in

Block

• Crankshaft Main Bearing Bore Diameter

78.070-78.088 mm

3.0760-3.0766 in

• Cylinder Bore Diameter

92.990-93.006 mm

3.6638-3.6644 in

• Cylinder Bore Out-of-Round

0.013 mm

0.0005 in

• Cylinder Head Deck Surface Flatness

0.08 mm

0.003 in

• Cylinder Liner Recession

0.015 mm

0.0006 in

Camshaft

• Camshaft End Play - Exhaust

0.045-0.215 mm

0.0017-0.0084 in

• Camshaft End Play - Intake

0.051-0.201 mm

0.0020-0.0079 in

• Camshaft Journal Diameter - All Intake and Exhaust #2-#7

26.936-26.960 mm

1.0612-1.0622 in

• Camshaft Journal Diameter - Exhaust #1

29.936-29.960 mm

1.1794-1.1804 in

• Camshaft Journal to Bore Clearance

0.040-0.085 mm

0.0015-0.0033 in

Connecting Rod

• Connecting Rod Bearing Clearance

0.021-0.065 mm

0.0008-0.0025 in

• Connecting Rod Bore Diameter - Bearing End

60.322-60.338 mm

2.3749-2.3755 in

• Connecting Rod Bore Out-of-Round - Bearing End

0.005 mm

0.0002 in

Connecting Rod Side Clearance

0.05-0.35 mm

0.0019-0.0137 in

Crankshaft

• Crankshaft End Play

0.112-0.388 mm

0.0044-0.0153 in

• Crankshaft Main Bearing Clearance

0.012-0.064 mm

0.0004-0.0025 in

• Crankshaft Main Journal Diameter

69.968-69.984 mm

2.7567-2.7574 in

• Crankshaft Rod Journal Diameter

56.7 mm

2.234 in

• Crankshaft Main Journal Out-of-Round

0.005 mm

0.0002 in

• Crankshaft Main Journal Taper

0.005 mm

0.0002 in

Cylinder Head

• Surface Flatness - Block Deck

0.08 mm

0.003 in

• Surface Flatness - Exhaust Manifold Deck

0.08 mm

0.003 in

• Surface Flatness - Intake Manifold Deck

0.08 mm

0.003 in

Exhaust Manifold

• Surface Flatness

0.08 mm

0.003 in

Lubrication System

• Oil Capacity - with Filter

6.6 L

7.0 qts

• Oil Capacity - without Filter

6.1 L

6.5 qts

• Oil Pressure - Minimum

85 KPa

12 psi @ 1200 RPM

Oil Pump

• Gear Diameter - Drive

73.415-73.370 mm

2.893-2.891 in

• Gear Diameter - Driven

87-86.975 mm

3.428-3.426 in

• Gear Pocket - Depth

15.609-15.584 mm

0.615-0.614 in

• Gear Pocket - Diameter

87.065-87.040 mm

3.430-3.429 in

• Gear Thickness - Drive

15.546-15.521 mm

0.613-0.611 in

• Gear Thickness - Driven

15.360-15.511 mm

0.605-0.611 in

• Lobe Inner Diameter - Maximum

11.9 mm

0.469 in

• Relief Valve-to-Bore Clearance

2.57-1.63 mm

0.101-0.064 in

Piston Rings

• Piston Ring End Gap - First Compression Ring

0.15-0.3 mm

0.0059-0.0118 in

• Piston Ring End Gap - Second Compression Ring

0.36-0.51 mm

0.0142-0.0201 in

• Piston Ring End Gap - Oil Control Ring

0.250-0.760 mm

0.0098-0.0299 in

• Piston Ring to Groove Clearance - First Compression Ring

0.043-0.093 mm

0.0017-0.0037 in

• Piston Ring to Groove Clearance - Second Compression Ring

0.043-0.093 mm

0.0017-0.0037 in

• Piston Ring to Groove Clearance - Oil Control Ring

0.059-0.215 mm

0.0023-0.0085 in

Pistons and Pins

• Piston - Piston Diameter

92.971-93.005 mm

3.6603-3.6616 in

• Piston - Piston Pin Bore Diameter

23.502-23.508 mm

0.9259-0.9262 in

• Piston - Piston to Bore Clearance

-0.015-0.035 mm

-0.0006-0.0014 in

• Pin - Piston Pin Clearance to Connecting Rod Bore

0.001-0.018 mm

0.0004-0.0007 in

• Pin - Piston Pin Clearance to Piston Pin Bore

0.003-0.012 mm

0.00012-0.0005 in

• Pin - Piston Pin Diameter

23.496-23.499 mm

0.9257-0.9258 in

Valve System

• Valves - Valve Face Runout

0.038 mm

0.0015 in

• Valves - Valve Seat Runout

0.05 mm

0.002 in

• Valves - Valve Stem-to-Guide Clearance - Exhaust

0.0375-0.0775 mm

0.0015-0.0030 in

• Valves - Valve Stem-to-Guide Clearance - Intake

0.030-0.065 mm

0.0011-0.0025 in

• Valve Springs - Valve Spring Load - Closed

211.4-233.4 N @ 35 mm

47.5-52.5 lb @ 1.701 in

• Valve Springs - Valve Spring Load - Open

579-631 N @ 24.5 mm

130-142 lb @ 1.260 in