Engine Mechanical Specifications. Pontiac G3 2008

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2008 🢒 G3 🢒 Preface 🢒 Cautions and Notices 🢒 Engine Mechanical Specifications

Table 1:	General Specifications
Table 2:	Cylinder Compression Check Specifications
Table 3:	Valve Clearance Specifications

General Specifications

Application	Specification
Application	Metric	English
Engine Information
Engine Type	Overhead Cam L-4
Bore	68.5 mm	2.70 in
Compression Ratio	9.3:1
Firing Order	1-3-4-2
Lubricating Type	Forced Feed
Maximum Power at 5,400 RPM	52.2 kW	71 HP
Maximum Torque at 4,200 RPM	104 N·m	76.7 lb ft
Oil Pump Type	Trocboid Rotor
Oil Filter Type	Cartridge (Full Flow)
Oil Pan Capacity Including Oil Filter	3.2 liter	3.4 quarts
Stroke	78.0 mm	3.07 in
Total Displacement	1150 cm³

Cylinder Compression Check Specifications

Condition	Cylinder Number
Condition	1	2	3	4
Compression top dead center of No. 1 cylinder
Intake	O	O	--	--
Exhaust	O	--	O	--
Exhaust top dead center of No. 1 cylinder
Intake	--	--	O	O
Exhaust	--	O	--	O
* O marks indicate the place where the valve clearance can be checked and adjusted.

Valve Clearance Specifications

Application	Specification
Application	Metric	English
Cold
Intake	0.15 +/- 0.02 mm	0.0059 +/- 0.0008 in
Exhaust	0.2 +/- 0.02 mm	0.00787 +/- 0.0008 in
Hot
Intake	0.25 +/- 0.02 mm	0.0098 +/- 0.0008 in
Exhaust	0.3 +/- 0.02 mm	0.0118 +/- 0.0008 in

Application	Specification
Application	Metric	English
Camshaft
Bearing Outside Diameter, Head Journal I D, No. 1	43.5000-43.516 mm	1.713-1.7132 in
Bearing Outside Diameter, Head Journal I D, No. 2	43.700-43.716 mm	1.720-1.7211 in
Bearing Outside Diameter, Head Journal I D, No. 3	43.900-43.916 mm	1.728-1.7290 in
Bearing Outside Diameter, Head Journal I D, No. 4	44.100-44.116 mm	1.736-1.7369 in
Bearing Outside Diameter, Head Journal I D, No. 5	44.300-44.316 mm	1.744-1.745 in
End Play
Journal Outside Diameter No. 1	43.425-43.450 mm	1.710-1.711 in
Journal Outside Diameter No. 2	43.625-43.650 mm	1.718-1.719 in
Journal Outside Diameter No. 3	43.825-43.850 mm	1.725-1.726 in
Journal Outside Diameter No. 4	44.025-44.050 mm	1.733 1.734 in
Journal Outside Diameter No. 5	44.225-44.250 mm	1.741-1.742 in
Lift Exhaust	5.38 mm	0.212 in
Lift Intake	5.42 mm	0.213 in
Crankshaft
Connecting Rod Journal Diameter, All	37.982-38.000 mm	1.495-1.496 in
Main Journal Crankshaft End Play	0.11-0.31 mm	0.004-0.012 in
Main Journal Diameter, All	43.982-44.000 mm	1.7316-1.7323 in
Main Journal Main Bearing Clearance, All	0.020-0.040 mm	0.0008-0.0016 in
Main Journal Out of Round, Maximum	0.005 mm	0.0002 in
Main Journal Taper, Maximum	0.005 mm	0.0002 in
Out of Round, Maximum	0.005 mm	0.0002 in
Rod Bearing Clearance, All	0.020-0.040 mm	0.0008-0.0016 in
Rod Side Clearance	0.10-0.25 mm	0.004-0.010 in
Taper, Maximum	0.005 mm	0.0002 in
Cylinder Bore
Diameter	68.5 mm	2.70 in
Out of Round, Maximum	0.005 mm	0.00020 in
Taper, Maximum	0.005 mm	0.00020 in
Oil Pump
Gap Between Oil Pump Body and Outer Rotor	0.10-0.17 mm	0.0039-0.0067 in
Inner Rotor Side Clearance	0.065-0.115 mm	0.0026-0.0045 in
Outer Rotor Side Clearance	0.065-0.115 mm	0.0026-0.0045 in
Relief Valve Spring Free Length	52.4 mm	2.06 in
Piston
Clearance to Bore	0.025-0.045 mm	0.0010-0.0018 in
Diameter	68.465-68.485 mm	2.695-2.696 in
Piston Pin
Diameter	16.995-17.000 mm	0.6691-0.6693 in
Pin Off-Set	0.4-06 mm	0.016-0.024 in
Piston Rings, End Gap
Top Compression	0.15-0.30 mm	0.006-0.012 in
2nd Compression	0.30-0.45 mm	0.012-0.018 in
Piston Rings, Groove Clearance
Top Impression	0.02-0.06 mm	0.0008-0.002 in
2nd Impression	0.02-0.06 mm	0.0008-0.002 in
Valve System
Face Angle, All	45 degrees
Face Runout, Maximum, All	0.045 mm	0.0018 in
Seat Angle, All	45 degrees
Seat Runout, Maximum, All	0.05 mm	0.0019 in
Seat Width, Exhaust	1.56 mm	0.061 in
Seat Width, Intake	1.56 mm	0.061 in
Valve Diameter, All, Exhaust	31.7-31.9 mm	1.248-1.256 in
Valve Diameter, All, Intake	35.5-35.7 mm	1.398-1.406 in
Valve Guide Inside Diameter	5.500-5.512 mm	0.2165-0.2170 in
Valve Lash Compensators	Mechanical
Valve Spring Loads, Valve Closed	23.4-27 Kgf@44.2 mm	51.59-59.53 lbs@1.740 in
Valve Spring Loads, Valve Open	51.7-58.3 Kgf@36.2 mm	113.97-128.53 lbs@1.425 in
Valve Stem Diameter, Exhaust	5.440-5.455 mm	0.214-0.215 in
Valve Stem Diameter, Intake	5.465-5.480 mm	0.215-0.216 in