GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

General

  • Engine Type

V-8

  • Displacement

4.0 Liter

244 cu in

  • RPO

L47

  • VIN

C

  • Compression Ratio

10.0:1

  • Compression Pressure at Cranking Speed, Throttle Open

965-1172 KPa

140-170 psi

  • Power

186.5 kW @ 5,600 RPM

250 hp @ 5,600 RPM

  • Torque

352.5 N·m @ 4,000 RPM

260 lb ft @ 4,000 RPM

  • Firing Order

1-2-7-3-4-5-6-8

Bearings

  • Crankshaft, Main, Bearing Material

Aluminum

  • Production Clearance

0.015-0.055 mm

0.0006-0.0022 in

  • Service - Maximum

0.0635 mm

0.0025 in

  • Connecting Rod Bearing Material

Aluminum

  • Production Clearance

0.025-0.076 mm

0.0010-0.0030 in

  • Service - Maximum

0.076 mm

0.0030 in

Camshaft

  • Camshaft Material

Hardened Cast Gray Iron

  • Bearing Number

5

  • Bearing Number on Left Cylinder Head Intake

6

  • Bearing Journal Diameter

26.948-26.972 mm

1.0610-1.0619 in

  • Bearing Bore Diameter, In Cylinder Head

27.013-27.033 mm

1.0635-1.0642 in

  • Bearing Clearance

0.051-0.076 mm

0.0020-0.0030 in

  • Production Limits

0.040-0.090 mm

0.0016-0.0035 in

  • Service Limits - Maximum

0.090 mm

0.0035 in

  • Runout

0.050 mm

0.0020 in

  • Out-of-Round

0.006 mm

0.0002 in

  • Straightness

0.007 mm

0.0003 in

  • Thrust Width

22.990-23.090 mm

0.9051-0.9091 in

  • Timing, @ 0.150 mm Lift, Intake Opens

5.6 degrees BTDC

  • Intake Centerline

113 degrees ABDC

  • Intake Closes

236.8 degrees ABDC

  • Exhaust Opens

222.5 degrees BTDC

  • Exhaust Centerline

107 degrees BTDC

  • Exhaust Closes

13.8 degrees ABDC

  • Camshaft Lift, Intake

6.15 mm

0.2421 in

  • Exhaust

5.94 mm

0.2339 in

  • Valve Intake

10.500 mm

0.4134 in

  • Exhaust

10.000 mm

0.3937 in

  • Duration, @ 0.150 mm Lift, Intake

242 degrees

  • Exhaust

236 degrees

  • Valve Overlap, @ 0.150 mm Lift

1.98 degrees

  • Left Intake Water Pump Drive End, Diameter

15.852-15.902 mm

0.6241-0.6261 in

  • Diameter Within Last 19.5 mm (0.7677 in)

15.872-15.882 mm

0.6249-0.6253 in

  • Runout

0.150 mm

0.0059 in

Camshaft Drive

  • Primary Drive Type

Endless Chain

  • Adjustment

Hydraulic, Automatic

  • Pitch

8 mm

0.315 in

  • Width

Single Row

  • Secondary Drive Type

Endless Chain

  • Adjustment

Hydraulic, Automatic

  • Pitch

8 mm

0.315 in

  • Width

Single Row

Connecting Rods

  • Diameter, Crankshaft End, Without Bearings

57.136-57.152 mm

2.2495-2.2501 in

  • Taper, Maximum

0.005 mm

0.0002 in

  • Piston Pin End, With Bushing

21.002-21.016 mm

0.8268-0.8274 in

  • Taper, Maximum

0.007 mm

0.0003 in

  • Without Bushing

23.453-23.493 mm

0.9234-0.9421 in

  • Width

21.774 mm

0.8572 in

  • Center to Center

151.000 mm

5.9449 in

  • Side Clearance, Pair of Connecting Rods on Crankpin

0.200-0.500 mm

0.0079-0.0197 in

Crankshaft

  • Journals Crankshaft, Main, Diameter

64.350-64.366 mm

2.5335-2.5341 in

  • Runout #1, #5

0.022 mm

0.0009 in

  • Runout #2, #3, #4

0.025 mm

0.0010 in

  • Round

0.005 mm

0.0002 in

  • Taper

0.005 mm

0.0002 in

  • Width, #1, #2, #4, #5

24.540-24.660 mm

0.9661-0.9709 in

  • Thrust #3, Wall Width

25.150-25.250 mm

0.9902-0.9941 in

  • Runout

0.040 mm

0.0016 in

  • Square

0.010 mm

0.0004 in

  • Crankpin, Connecting Rod, Diameter

53.947-53.963 mm

2.1239-2.1245 in

  • Round

0.005 mm

0.0002 in

  • Taper

0.005 mm

0.0002 in

  • Width

43.840-43.960 mm

1.7260-1.7307 in

  • End Play, Production

0.050-0.500 mm

0.0020-0.0197 in

  • Service - Maximum

0.500 mm

0.0197 in

  • Flange, Engine Flywheel, Face Runout

0.025 mm

0.0010 in

  • Rear Seal, Diameter

95.880-95.980 mm

3.7748-3.7787 in

  • Runout

0.025 mm

0.0010 in

  • Nose Diameter, 0.0-21.0 mm, From Front Face

34.500-34.750 mm

1.3583-1.3681 in

  • Runout

0.100 mm

0.0039 in

  • 21.0-53.00 mm, From Front Face

34.892-34.912 mm

1.3737-1.3745 in

  • Runout

0.030 mm

0.0012 in

  • 53.00 mm, From Front Face, to Rolled Fillet

33.450-33.550 mm

1.3169-1.3209 in

  • Runout

0.100 mm

0.0039 in

  • 89.94-110.54 mm, From Front Face

44.950-45.000 mm

1.7697-1.7717 in

  • Runout

0.025 mm

0.0010 in

Crankshaft Balancer

  • Hub Inside Diameter

34.847-34.864 mm

1.3719-1.3726 in

  • Outside Diameter, Without Wear Sleeve

50.730-50.870 mm

1.9972-2.0028 in

  • Runout

0.100 mm

0.0039 in

Cylinder Block

  • Material

Aluminum with Cast-in Gray Iron Sleeves

  • Length

528.45 mm

20.8100 in

  • Cylinder Bore Diameter @ 41 mm (1.6100 in) Below Deck Face

86.992-87.008 mm

3.4249-3.4255 in

  • Out-of-Round, Production

0.010 mm

0.0004 in

  • Service - Maximum Allowed

0.100 mm

0.0039 in

  • Taper, Production

0.010 mm

0.0004 in

  • Service - Maximum Allowed

0.100 mm

0.0039 in

  • Piston Clearance @ 41 mm (1.6100 in) Below Deck Face

0.020-0.051 mm

0.0008-0.0020 in

  • Stroke

84 mm

3.3071 in

  • Deck Height

224.55 mm

8.8406 in

  • Clearance - Above Deck Surface

0.45 mm

0.0177 in

  • Face Flatness - Maximum Allowed

0.100 mm

0.0039 in

  • Crankshaft Bearing Bore, Mains, Diameter

72.430-72.442 mm

2.8516-2.8521 in

  • Crankshaft Rear Seal Bore, Diameter

115.962-116.038 mm

4.5654-4.5684 in

  • Runout - Maximum Allowed

0.250 mm

0.0098 in

Cylinder Head

  • Type

DOHC -- 4 Valves Per Cylinder

  • Material

Aluminum

  • Chamber Depth to Surface

10.470-10.710 mm

0.4122-0.4217 in

  • Flatness, Without Resurfacing - Maximum

0.050 mm

0.0020 in

  • Resurfacing Amount - Maximum

0.200 mm

0.0079 in

  • Distance to Camshaft Bore Centerline

136.000 mm

5.3543 in

  • Inside Diameter

5.969-5.989 mm

0.2350-0.2358 in

  • Valve Guide-to-Valve Stem Clearance Production, Exhaust

0.050-0.100 mm

0.0020-0.0039 in

  • Intake

0.028-0.068 mm

0.0011-0.0027 in

  • Service, Exhaust

0.120 mm

0.0047 in

  • Intake

0.110 mm

0.0043 in

  • Valve Seating Surface, Angle

45.75 degrees

  • Width, Exhaust

1.300-1.700 mm

0.0512-0.0669 in

  • Intake

0.420-0.820 mm

0.0165-0.0323 in

  • Runout - Maximum

0.050 mm

0.0020 in

  • Relief, Angle

20 degrees

  • Width, Exhaust

0.160-0.360 mm

0.0063-0.0142 in

  • Intake

0.110-0.310 mm

0.0043-0.0118 in

  • Runout - Maximum

0.050 mm

0.0020 in

  • Undercut Angle, Exhaust

65 degrees

  • Intake

60 degrees

Oil System

  • Oil Pump Type

Gerotor

  • Minimum Pressure at Normal Operating Temperature @ Idle

35 kPa

5 psi

  • Minimum Pressure at Normal Operating Temperature @ 2,000 RPM

250 kPa

35 psi

  • Oil Pressure Recirculation

Internal Piston Valve

  • Oil Filter Type

PF 58

  • Oil Capacity with Filter

7.098 Liter

7.5 Quarts

  • Without Filter

6.625 Liter

7.0 Quarts

Pistons

  • Material

Aluminum

  • Diameter

86.977-86.962 mm

3.4243-3.4237 in

  • Taper

No Taper Measurement

  • Pin Bore Diameter

21.003-21.008 mm

0.8269-0.8271 in

  • Ring Groove Width, 1st Compression, Top

1.230-1.255 mm

.0484-0.0494 in

  • 2nd Compression

1.530-1.555 mm

0.0602-0.0612 in

  • Oil Control

2.530-2.555 mm

0.0996-0.1006 in

  • Inside Diameter, 1st Compression, Top

79.540-79.790 mm

3.1315-3.1413 in

  • 2nd Compression

77.270-77.520 mm

3.0421-3.0520 in

  • Oil Control

79.680-79.930 mm

3.1370-3.1468 in

Piston Pins

  • Material

Steel

  • Diameter

20.995-21.000 mm

0.8266-0.8268 in

  • Length

62.000-61.500 mm

2.4409-2.4212 in

  • Retention

Snap Rings (2)

Piston Rings

  • Compression

2

  • Oil Ring

1

  • Side Clearance, 1st Compression, Top

0.040-0.095 mm

0.0016-0.0037 in

  • 2nd Compression

0.040-0.095 mm

0.0016-0.0037 in

  • Oil Control

None - Side Sealing

  • Ring End Gap, 1st Compression, Top

0.250-0.400 mm

0.0098-0.0157 in

  • 2nd Compression

0.350-0.050 mm

0.0138-0.0020 in

  • Oil Control

0.250-0.760 mm

0.0098-0.0299 in

Rocker Arms, Followers

  • Type

Roller

  • Ratio

1.68 to 1

  • Roller Diameter

17.740-17.800 mm

0.6984-0.7008 in

Valves

  • Exhaust, Length from Tip to Face OD

91.730-91.990 mm

3.6114-3.6217 in

  • Head, Diameter

27.880-28.140 mm

1.0976-1.1079 in

  • Runout - Maximum

0.380 mm

0.0150 in

  • Chamfer, Angle

30 degrees

  • Width - Minimum

0.380 mm

0.0150 in

  • Margin Width

1.070 mm

0.0421 in

  • Face, Angle

45 degrees

  • Width - Minimum

1.500 mm

0.0591 in

  • Runout - Maximum

0.038 mm

0.0015 in

  • Valve Stem Diameter

5.920-5.940 mm

0.2331-0.2339 in

  • Out-of-Round - Maximum Deviation

0.008 mm

0.0003 in

  • Straightness - Maximum Deviation

0.013 mm

0.0005 in

  • Intake, Length from Tip to Face OD

110.600-110.860 mm

4.3543-1.3646 in

  • Head Diameter

34.090-34.350 mm

1.3421-1.3524 in

  • Runout - Maximum

0.380 mm

0.0150 in

  • Chamfer, Angle

30 degrees

  • Width - Minimum

0.380 mm

0.0150 in

  • Margin Width

0.890 mm

0.0350 in

  • Face, Angle

45 degrees

  • Width - Minimum

1.000 mm

0.0394 in

  • Runout - Maximum

0.038 mm

0.0015 in

  • Valve Stem Diameter

5.920-5.940 mm

0.2331-0.2339 in

  • Out-of-Round - Maximum Deviation

0.008 mm

0.0003 in

  • Straightness - Maximum Deviation

0.013 mm

0.0005 in

Valve Lifters, Stationary Hydraulic Lifter Adjuster - SHLA

  • Type

Stationary Hydraulic

  • Diameter

11.986-12.000 mm

0.4719-0.4724 in

  • Lifter Bore Diameter, In Cylinder Head

12.013-12.037 mm

0.4730-0.4739 in

  • Clearance

0.037-0.041 mm

0.0015-0.0016 in

Valve Springs

  • Length Installed

35 mm

1.3780 in

  • Free

40.790-43.690 mm

1.6059-1.7201 in

  • Valve Closed

35 mm

1.3780 in

  • Valve Open

24.500 mm

0.9646 in

  • Force, Valve Closed

211.4-233.4 N

47.5-52.5 lb

  • Valve Open

579.0-631.0 N

130.2-141.9 lb

  • Diameter Inside

17.750-18.250 mm

0.6988-0.7185 in

  • Outside

26.23 mm

1.0327 in

  • Wire, Ovate

4.110 x 3.280 mm

0.1618 x 0.1291 in

  • Coil Direction

Clockwise

  • Total Number of Coils

6.90 - 7.10

  • Identifier

Orange