Engine Mechanical Specifications

WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE MECHANICAL SPECIFICATIONS

Application		Specification
Application		Metric	English
General Data
	Engine Type	60 degree V-6
	Displacement	3.4L	204 cu in
	RPO	LA1
	VIN	E
	Bore	92 mm	3.62 in
	Stroke	84 mm	3.31 in
	Compression Ratio	9.6:1
	Firing Order	1-2-3-4-5-6
	Spark Plug Gap	1.52 mm	0.60 in
Block
	Camshaft Bearing Bore Diameter - Front and Rear	51.03-51.08 mm	2.009-2.011 in
	Camshaft Bearing Bore Diameter - Middle #2, #3	50.77-50.82 mm	1.999-2.001 in
	Crankshaft Main Bearing Bore Diameter	72.1535-72.0695 mm	2.840-2.841 in
	Crankshaft Main Bearing Bore Out-of-Round	0.008 mm	0.00031 in
	Cylinder Bore Diameter - Production	92.020-92.038 mm	3.622-3.623 in
	Cylinder Bore Diameter - Service	92.020-92.038 mm	3.622-3.623 in
	Cylinder Bore Out-of-Round - Diametral - Production	0.020 mm	0.0008 in
	Cylinder Bore Out-of-Round - Diametral - Service	0.025 mm	0.001 in
	Cylinder Bore Taper - Production	0.020 mm	0.0008 in
	Cylinder Bore Taper - Service	0.025 mm	0.001 in
	Cylinder Head Deck Height	224 mm	8.818 in
	Cylinder Head Deck Surface Flatness	0.05 mm per 152 mm	0.0019 in per 6 in
	Valve Lifter Bore Diameter	21.417-21.455 mm	0.843-0.844 in
Camshaft
	Camshaft Bearing Inside Diameter	47.523-47.549 mm	1.871-1.872 in
	Camshaft Journal Diameter	47.45-47.48 mm	1.868-1.869 in
	Camshaft Journal Out-of-Round	0.025 mm	0.001 in
	Camshaft Lobe Lift - Exhaust	6.9263 mm	0.2727 in
	Camshaft Lobe Lift - Intake	6.9263 mm	0.2727 in
Cooling System
	Capacity Engine RPM	12.4 liters	13.1 quarts
	Thermostat Full Open Temperature	195 degrees
Connecting Rod
	Connecting Rod Bearing Clearance	0.18-0.062 mm	0.0007-0.017 in
	Connecting Rod Bore Diameter	53.962-53.978 mm	2.124-2.125 in
	Connecting Rod Bore Out-of-Round	0.008 mm	0.0002 in
	Connecting Rod Length - Center to Center	144.75-144.81 mm	5.69-5.70 in
	Connecting Rod Side Clearance	0.25-0.37 mm	0.010-0.015 in
Crankshaft
	Connecting Rod Journal Diameter	50.768-50.784 mm	1.9987-1.9994 in
	Connecting Rod Journal Out-of-Round	0.005 mm	0.0002 in
	Connecting Rod Journal Taper	0.005 mm	0.0002 in
	Connecting Rod Journal Width	21.92-22.08 mm	0.863-0.869 in
	Crankshaft End Play	0.060-0.210 mm	0.0024-0.0083 in
	Crankshaft Main Bearing Journal Width	23.9-24.1 mm	0.941-0.949 in
	Crankshaft Main Bearing Clearance - Except #3	0.019-0.064 mm	0.0008-0.0025 in
	Crankshaft Main Bearing Clearance - #3 Thrust Bearing	0.032-0.077 mm	0.0012-0.0030 in
	Crankshaft Main Journal Diameter	67.239-67.257 mm	2.6473-2.6483 in
	Crankshaft Main Journal Out-of-Round	0.005 mm	0.0002 in
	Crankshaft Main Journal Taper	0.005 mm	0.0002 in
	Crankshaft Rear Flange Runout	0.04 mm	0.0016 in
Cylinder Head
	Combustion Chamber Depth - at Measurement Point	2.2 mm	0.087 in
	Surface Finish - Maximum	2.8 RA
	Surface Flatness - Block Deck	0.08 mm per 152 mm	0.003 in per 6 in
	Surface Flatness - Exhaust Manifold Deck	0.1 mm	0.004 in
	Surface Flatness - Intake Manifold Deck	0.1 mm	0.004 in
	Valve Guide Bore - Exhaust	8.01 mm	0.315 in
	Valve Guide Bore - Intake	8.01 mm	0.315 in
	Valve Guide Installed Height	16.6 mm	0.654 in
Lubrication System
	Oil Capacity - with Filter	4.3 liters 4.5 quarts
	Oil Capacity - without Filter	3.8 liters 4.0 quarts
	Oil Pressure - 1850 RPM	414 kPa	60 psi
Oil Pump
	Gear Diameter	38.05-38.10 mm	1.498-1.500 in
	Gear Pocket - Depth	30.52-30.58 mm	1.202-1.204 in
	Gear Pocket - Diameter	38.176-38.226 mm	1.503-1.505 in
	Gears Lash	0.094-0.195 mm	0.0037-0.0077 mm
	Relief Valve-to-Bore Clearance	0.038-0.089 mm	0.0015-0.0035 in
Piston Ring End Gap
	First Compression Ring	0.15-0.36 mm	0.006-0.014 in
	Second Compression Ring	0.48-0.74 mm	0.0188-0.0291 in
	Oil Control Ring	0.25-0.77 mm	0.0098-0.0303 in
Piston Ring to Groove Clearance
	First Compression Ring	0.04-0.086 mm	0.002-0.0033 in
	Second Compression Ring	0.04-0.08 mm	0.002-0.0031 in
	Oil Control Ring	0.07-0.095 mm	0.0028-0.0037 in
Piston Ring Thickness
	First Compression Ring	1.164-1.190 mm	0.046-0.047 in
	Second Compression Ring	1.460-1.490 mm	0.0574-0.0586 in
	Oil Control Ring - Maximum	2.960 mm	0.116 in
Piston
	Piston Diameter - production - cylinder 1-4	91.985-92.003 mm	3.621-3.622 in
	Piston Diameter - service limit - cylinder 1-4	91.945 mm	3.619 in
	Piston Diameter - production - cylinder 5-6	91.99-92.028 mm	3.621-3.623 in
	Piston Diameter - service limit - cylinder 5-6	91.945 mm	3.619 in
	Piston Pin Bore Diameter	23.005-23.010 mm	0.9057-0.9059 in
	Piston Ring Groove Width - First	1.23-1.25 mm	0.048-0.049 in
	Piston Ring Groove Width - Second	1.53-1.55 mm	0.060-0.061 in
	Piston Ring Groove Width - Oil Control	3.03-3.055 mm	0.119-0.120 in
	Piston to Bore Clearance - production - 1-4	0.17-0.053 mm	0.0006-0.0020 in
	Piston to Bore Clearance - service limit-- 1-4	0.093 mm	0.0036 in
	Piston to Bore Clearance - production - 5-6	-0.008-0.048 mm	-0.0003-0.0018 in
	Piston to Bore Clearance - service limit-- 5-6	0.093 mm	0.0036 in
Pin
	Piston Pin Clearance to Connecting Rod Bore - Press Fit	-0.047 to -0.019 mm	-0.0019 to -0.0007 in
	Piston Pin Clearance to Piston Pin Bore	0.008-0.016 mm	0.00031-0.00063 in
	Piston Pin Diameter	22.994-22.997 mm	0.9053-0.9054 in
Valves
	Valve Face Angle	45 degrees
	Valve Seat Angle	46 degrees
	Valve Seat Depth - Intake - from deck face	7.9-8.1 mm	0.311-0.318 in
	Valve Seat Depth - Exhaust - from deck face	8.9-9.1 mm	0.350-0.358 in
	Valve Seat Runout	0.037 mm	0.0015 in
	Valve Seat Width - Intake	1.55-1.80 mm	0.061-0.071 in
	Valve Seat Width - Exhaust	1.70-2.0 mm	0.067-0.079 in
	Valve Stem-to-Guide Clearance	0.026 0.068 mm	0.0010-0.0027 in
Valve Lifters/Push Rods
	Push Rod Length - Intake	146.0 mm	5.75 in
	Push Rod Length - Exhaust	152.5 mm	6.0 in
Valve Springs
	Valve Spring Free Length	48.5 mm	1.89 in
	Valve Spring Installed Height	43.2 mm	1.701 in
	Valve Spring Load - Closed	320 N 43.2 mm	75 lb 1.701 in
	Valve Spring Load - Open	1036 N 32 mm	230 lb 1.260 in
	Valve Spring Total Number of Coils	6.55