Engine Mechanical Specifications

WARNING: This page is about a different car, the 2002 Pontiac Aztek and 2002 Buick Rendezvous. 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 - VIN Code	LA1 (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
	Oil Pressure - Warm	103 kPa	15 psi @ 1100 RPM
Cylinder Bore
	Diameter	92.019-92.037 mm	3.6228-3.6235 in
	Out Of Round Maximum	0.009 mm	0.00035 in
	Taper - Thrust Side Maximum	0.010 mm	0.0004 in
Piston - non-coated
	Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - production	91.985-92.003 mm	3.6215-3.222 in
	Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - service limit	91.955-91.973 mm	3.620-3.621 in
	Clearance - production	0.016-0.052 mm	0.0006-0.0020 in
	Clearance - service limit	0.047-0.083 mm	0.0019-0.0033 in
	Pin Bore	23.005-23.010 mm	0.9057-0.9059 in
Piston - Grafal coated
	Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - production	91.990-92.028 mm	3.6217-3.6232 in
	Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - service limit	91.950-91.988 mm	3.6201-3.6216 in
	Clearance - production	0.008-0.048 mm	0.00031-0.0019 in
	Clearance - service limit	0.032-0.088 mm	0.0013-0.0035 in
	Pin Bore	23.005-23.010 mm	0.9057-0.9059 in
Piston Ring
	Top Groove Side Clearance	0.04-0.086 mm	0.002-0.0034 in
	Second Groove Side Clearance	0.04-0.09 mm	0.002-0.0035 in
	Top Ring Gap	0.21-0.48 mm	0.008-0.019 in
	Second Ring Gap	0.54-0.86 mm	0.0213-0.0339 in
	Oil Ring Groove Clearance	0.46-0.20 mm	0.0018-0.0079 in
	Gap in Cylinder Bore	0.31-0.89 mm	0.012-0.035 in
Piston Pin
	Diameter	22.994-22.997 mm	0.9053-0.9054 in
	Clearance In Piston	0.008-0.016 mm	0.00031-0.00063 in
	Fit In Rod	-0.047 to -0.019 mm press fit	-0.0019 to -0.0007 in
Crankshaft
	Main Journal Diameter	67.239-67.257 mm	2.6473-2.6483 in
	Main Journal Taper	0.005 mm	0.0002 in
	Out Of Round - Max	0.005 mm	0.0002 in
	Flange Runout - Max	0.04 mm	0.0016 in
	Cylinder Block Main Bearing Bore Diameter	72.155-72.168 mm	2.8407-2.8412 in
	Crankshaft Main Bearing Inside Diameter	67.289-67.316 mm	2.6492-2.6502 in
	Main Bearing Clearance	0.019-0.064 mm	0.0008-0.0025 in
	Main Thrust Bearing Clearance	0.032-0.077 mm	0.0012-0.0030 in
	Crankshaft End Play	0.060-0.210 mm	0.0024-0.0083 in
	Crankshaft Flange Runout - Max	0.04 mm	0.0016 in
Connecting Rod
	Rod Bearing Journal Diameter	50.768-50.784 mm	1.9987-1.9994 in
	Rod Bearing Journal Taper - Max	0.005 mm	0.0002 in
	Rod Bearing Journal Out Of Round - Max	0.005 mm	0.0002 in
	Rod Bearing Bore Diameter	53.962-53.984 mm	2.124-2.125 in
	Rod Inside Bearing Diameter	50.812-50.850 mm	2.000-2.002 in
	Rod Bearing Journal Clearance	0.018-0.062 mm	0.0007-0.0024 in
	Rod Side Clearance	0.18-0.44 mm	0.007-0.017 in
Camshaft
	Lobe Lift - Intake and Exhaust	6.9263 mm	0.2727 in
	Journal Diameter	47.45-47.48 mm	1.868-1.869 in
	Camshaft Bearing Bore Diameter-Front and Rear	51.03-51.08 mm	2.009-2.011 in
	Camshaft Bearing Bore Diameter-Middle #2 and #3	50.77-50.82 mm	1.999-2.001 in
	Camshaft Bearing Inside Diameter	47.523-47.549 mm	1.871-1.872 in
	Journal Clearance	0.026-0.101 mm	0.001-0.0039 in
	Journal Runout - Max	0.025 mm	0.001 in
Valve System
	Roller Lifter	Hydraulic
	Rocker Arm Ratio	1.60:1
	Valve Face Angle	45 degrees
	Seat Angle	46 degrees
	Valve Seat Runout	0.050 mm	0.002 in
	Seat Width-Intake	1.55-1.80 mm	0.061-0.071 in
	Seat Width-Exhaust	1.70-2.0 mm	0.067-0.079 in
	Valve Margin - Minimum Intake	2.10 mm	0.083 in
	Valve Margin - Minimum Exhaust	2.70 mm	0.106 in
	Valve Stem Clearance	0.026-0.068 mm	0.0010-0.0027 in
Valve Spring
	Valve Springs Free Length	48.5 mm	1.89 in
	Valve Springs Load - Closed	320 N @ 43.2 mm	75 lb @ 1.701 in
	Valve Springs Load - Open	1036 N @ 32 mm	230 lb @ 1.260 in
	Installed Height Intake-Exhaust	43.2 mm	1.701 in
	Approximate number of coils	6.55
Oil Pump
	Gear Lash	0.094-0.195 mm	0.0037-0.0077 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
Oil Pump Gear
	Length	30.45-30.48 mm	1.199-1.200 in
	Diameter	38.05-38.10 mm	1.498-1.500 in
	Side Clearance	0.038-0.088 mm	0.001-0.003 in
	End Clearance	0.040-0.125 mm	0.002-0.005 in
	Valve to Bore Clearance	0.038-0.089 mm	0.0015-0.0035 in