Engine Mechanical Specifications. Chevrolet Venture Ext. 2002

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2002 🢒 Venture Ext. 🢒 Engine 🢒 Engine Mechanical - 3.4L 🢒 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
Block
Cylinder Head Deck Surface Flatness	0.05 mm per 152 mm	0.0019 in per 6 in
Cylinder Head
Surface Flatness - Block Deck	0.08 mm per 152 mm	0.003 in per 6 in
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