Engine Mechanical Specifications. Chevrolet Astro

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1996 🢒 Astro - 4WD 🢒 Engine 🢒 Engine Mechanical - 4.3L (VIN W) 🢒 Engine Mechanical Specifications

Application	Metric	English
General Data
Engine Type 90 Degree V6	--	--
RPO VIN Code L35 (W)	--	--
Displacement	4.3L	262 CID
Bore	101.60 mm	4.000 in
Stroke	88.39 mm	3.480 in
Compression Ratio	--	9.2:1
Firing Order	--	1-6-5-4-3-2
Spark Plug Gap	1.24 mm	0.060 in
Oil Pressure (Minimum Hot)	41.4 kPa at 1,000 engine rpm (Minimum) 124.1 kPa at 2,000 engine rpm 165.4 kPa at 4,000 engine rpm	6.0 psig at 1,000 engine rpm 18.0 psig at 2,000 engine rpm 24.0 psig at 4,000 enigne rpm
Lubrication System
Oil Capacity Without Filter Change	3.75 Liters	4 quarts
Oil Capacity With Filter Change Add	0.398 Liters	0.42 quarts
Oil Pan
Engine Block Clearance Tolerance	0.254 mm	0.010 in (Maximum)
Cylinder Head
Surface Flatness	0.102 mm	0.004 in (Maximum)
Exhaust Manifold
Surface Flatness	0.254 mm	0.010 in (Maximum)
Intake Manifold
Surface Flatness	0.254 mm	0.010 in (Maximum)
Cylinder Bore
Diameter	101.618-101.643 mm	4.0007-4.0017 in
Out-of-Round Production	0.02 mm (Maximum)	0.0001 in (Maximum)
Out-of-Round Service Limit	0.05 mm (Maximum)	0.002 in (Maximum)
Taper Production Thrust Side	0.012 mm (Maximum)	0.0005 in (Maximum)
Taper Production Relief Side	0.025 mm (Maximum)	0.001 in (Maximum)
Taper Service Limit	0.025 mm (Maximum)	0.001 in (Maximum)
Piston
Piston Bore Clearance-Production	0.0001-0.005 mm	0.0007-0.002 in
Piston Bore Clearance-Service Limit	0.070 mm (Maximum)	0.0024 mm (Maximum)
Piston Rings (End Gap Measured in Cylinder Bore)
Piston Compression Ring Groove Clearance-Production Top	0.050-0.15 mm	0.02-0.06 in
Piston Compression Ring Groove Clearance-Production 2nd	0.10-0.20 mm	0.04-0.08 in
Piston Compression Ring Groove Clearance-Service Limit	0.107 mm (Maximum)	0.0042 in (Maximum)
Piston Compression Ring Gap-Production Top	0.25-0.40 mm	0.010-0.016 in
Piston Compression Ring Gap-Production 2nd	0.46-0.66 mm (Maximum)	0.018-0.026 in (Maximum)
Piston Compression Ring Gap-Service Limit	0.25-0.88 (Maximum)	0.06-0.035 in (Maximum)
Piston Oil Ring Groove Clearance-Production	0.051-0.20 mm	0.02-0.07 in
Piston Oil Ring Groove Clearance-Service Limit	0.051-0.20 mm (Maximum)	0.02-0.08 in (Maximum)
Piston Oil Ring Gap-Production	0.003-0.0127 mm	0.015-0.050 in
Piston Oil Ring Gap-Service Limit	0.25-1.65 mm (Maximum)	0.009-0.065 in (Maximum)
Piston Pin
Diameter	23.545-23.548 mm	0.9267-0.9271 in
Clearance in Piston-Production	0.009-0.0024 mm	0.0002-0.0007 in
Clearance in Piston-Service Limit	0.0025 mm (Maximum)	0.001 in (Maximum)
Fit in Connecting Rod	0.021-0.040 mm (Interference)	0.0008-0.0016 in (Interference)
Crankshaft
Crankshaft Journal-Diameter #1	62.199-62.217 mm	2.4488-2.4495 in
Crankshaft Journal-Diameter #2, #3	62.191-62.215 mm	2.4485-2.4494 in
Crankshaft Journal-Diameter #4	62.179-62.203 mm	0.0011-0.0023 in
Crankshaft Journal Taper-Production	0.00007 mm (Maximum)	0.0003 in (Maximum)
Crankshaft Journal Out-of-Round-Production	0.005 mm (Maximum)	0.0002 in (Maximum)
Crankshaft Journal Out-of-Round-Service Limit	0.025 mm (Maximum)	0.001 in (Maximum)
Crankshaft Bearing Clearance-Production #1	0.0043-0.000508 mm	0.0008-0.0020 in
Crankshaft Bearing Clearance-Service Limit #2, #3, #4	0.025-0.064 mm	0.0010-0.025 in
Crankshaft Bearing Clearance-Service Limit #1	0.0254-0.05 mm	0.0010-0.0020 in
Crankshaft End Play	0.050-0.20 mm	0.002-0.008 in
Crankshaft Runout	0.025 mm	0.001 in
Connecting Rod
Connecting Rod Journal Diameter	57.117-57.142 mm	2.2487-2.2497 in
Connecting Rod Journal Taper-Production	0.007 mm (Maximum)	0.0003 in (Maximum)
Connecting Rod Journal Taper-Service Limit	0.025 mm (Maximum)	0.001 in (Maximum)
Connecting Rod Journal Out-of-Round-Production	0.007 mm (Maximum)	0.0002 in (Maximum)
Connecting Rod Journal Out-of-Round-Service Limit	0.025 mm (Maximum)	0.001 in (Maximum)
Rod Bearing Clearance-Production	0.033-0.088 mm	0.0013-0.0035 in
Rod Bearing Clearance-Service Limit	0.025-0.076 mm	0.0010-0.0030 in
Rod Side Clearance	0.16-0.43 mm	0.006-0.017 in
Camshaft
Journal Diameter	47.452-47.478 mm	1.8682-1.8692 in
End Play	0.0254-0.2286 mm	0.001-0.009 in
Lobe Lift Intake	0.0726-0.0736 mm	0.286-0290 in
Lobe Lift Exhaust	0.0741-0.0751 mm	0.292-0.296 in
Balance Shaft
Front Bearing Journal Diameter	55.985-55.001 mm	2.1648-2.1654 in
Rear Bearing Journal Diameter	38.084-38100 mm	1.4994-1.500 in
Rear Bearing Journal Clearance	0.0254-0.09144 mm	0.001-0.0036 in
Valve System
Valve Lifter	--	Hydraulic Roller Type
Valve Rocker Arm Ratio	--	1.50:1
Valve Lash	Net Lash No Adjustment
Face Angle	45 degrees
Seat Angle	46 degrees
Seat Runout	0.05 mm (Maximum)	0.002 in (Maximum)
Seat Width Intake	0.88-1.52 mm	0.035-0.060 in
Seat Width Exhaust	1.575-2.362 mm	0.062-0.093 in
Stem Clearance Production Intake	0.025-0.069 mm	0.0011-0.0027 in
Stem Clearance Production Exhaust	0.025-0.069 mm	0.0011-0.0027 in
Stem Clearance Service Limit Intake	0.0257 mm (Maximum)	0.001 in (Maximum)
Stem Clearance Service Limit Exhaust	0.0508 mm (Maximum)	0.002 in (Maximum)
Valve Spring Free Length	52 mm	2.03 in
Valve Spring Pressure Closed	338-374 N at 43 mm	76-84 lb at 1.70 in
Valve Spring Pressure Open	832-903 N at 32 mm	187-203 lb at 1.27 in
Valve Spring Installed Height	42.92-43.43 mm	1.690-1.710 in
Valve Lift Intake	10.51 mm	0.414 in
Valve Lift Exhaust	10.87 mm	0.428 in