Engine Mechanical Specifications

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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	In-Line-6
	Displacement	4.2 L	256 cu in
	RPO (VIN Code)	LL8
Spark Plug Gap
	Maximum	1.25 mm	0.050 in
	Minimum	1.14 mm	0.044 in
	Bore 93 mm	3.66 in
	Stroke	102 mm	4.02 in
	Compression Ratio	10: 1
	Firing Order	1-5-3-6-2-4
	Oil Pressure (At the sending unit) Warm - Minimum	85 kPa	12 psi @ 1200 RPM
Cylinder Bore
	Diameter	92.990-93.006 mm	3.6638-3.6644 in
	Out Of Round - Maximum	0.013 mm	0.0005 in
	Cylinder Liner Recession - Maximum	0.015 mm	0.0006 in
Piston & Pin
	Piston Diameter - 38 mm (1.4961 in) down from top	92.963-92.977 mm	3.6627-3.6633 in
	Piston to Bore Clearance	0.013-0.043 mm	0.0004-0.0017 in
	Piston to Pin Clearance	0.003-0.012 mm	0.00012-0.0005 in
	Pin Bore	23.002-23.008 mm	0.9056-0.9058 in
	Piston Pin Diameter	22.996-22.999 mm	0.9054-0.9055 in
Piston Ring
	Top Groove to Ring Side Clearance	0.043-0.093 mm	0.0017-0.0037 in
	Second Groove to Ring Side Clearance	0.043-0.093 mm	0.0017-0.0037 in
	Oil Control Groove to Ring Side Clearance	0.059-0.215 mm	0.0023-0.0085 in
	Top Ring Gap - 93 mm (3.66 in) down from top of cylinder	0.2-0.4 mm	0.0079-0.0157 in
	Second Ring Gap - 93 mm (3.66 in) down from top of cylinder	0.3-0.5 mm	0.0118-0.0197 in
	Oil Control Ring Gap - 93 mm (3.66 in) down from top of cylinder	0.250-0.760 mm	0.0098-0.0299 in
Crankshaft
	Main Journal Diameter	69.968-69.984 mm	2.7567-2.7574 in
	Main Journal Taper - Maximum	0.005 mm	0.0002 in
	Out Of Round - Maximum	0.005 mm	0.0002 in
	Cylinder Block Main Bearing Bore Diameter	78.070-78.088 mm	3.0760-3.0766 in
	Crankshaft Main Bearing Inside Diameter	69.997-70.031 mm	2.7579-2.7592 in
	Main Bearing Clearance	0.012-0.064 mm	0.0004-0.0025 in
	Crankshaft End Play	0.112-0.388 mm	0.0044-0.0153 in
Connecting Rod
	Connecting Rod Bearing Journal Diameter	56.693-56.707 mm	2.2337-2.2342 in
	Connecting Rod Bearing Journal Out Of Round - Maximum	0.005 mm	0.0002 in
	Connecting Rod Bearing Bore Diameter	60.322-60.338 mm	2.3749-2.3755 in
	Connecting Rod Inside Bearing Diameter	56.729-56.757 mm	2.2351-2.2362 in
	Connecting Rod Bearing Journal Clearance	0.021-0.065 mm	0.0008-0.0025 in
	Connecting Rod Side Clearance	0.05-0.35 mm	0.0019-0.0137 in
	Connecting Rod Bushing to Pin Clearance	0.001-0.018 mm	0.0004-0.0007 in
	Connecting Rod Inside Bushing Diameter	23.000-23.014 mm	0.9055-0.9060 in
Camshaft
	Journal Diameter - All Intake and Exhaust #2 - #7	26.936-26.960 mm	1.0612-1.0622 in
	Journal Diameter - Exhaust #1	29.936-29.960 mm	1.1794-1.1804 in
	Camshaft Bore Diameter - All Intake and Exhaust #2 - #7	27.000-27.021 mm	1.0638-1.0646 in
	Camshaft Bore Diameter - Exhaust #1	30.000-30.021 mm	1.1820-1.1828 in
	Journal Clearance	0.040-0.085 mm	0.0015-0.0033 in
	Camshaft Endplay - Intake	0.051-0.201 mm	0.0020-0.0079 in
	Camshaft Endplay - Exhaust	0.045-0.215 mm	0.0017-0.0084 in
Valve System
	Stationary Lash Adjuster	Hydraulic
	Valve Seat Runout - Maximum	0.05 mm	0.002 in
	Valve Face Runout - Maximum	0.038 mm	0.0015 in
	Valve Stem Clearance - Intake	0.030-0.065 mm	0.0011-0.0025 in
	Valve Stem Clearance - Exhaust	0.0375-0.0775 mm	0.0015-0.0030 in
Valve Spring
	Valve Springs Load (Closed)	211.4-233.4 N @ 35.0 mm	47.5-52.5 lb @ 1.701 in
	Valve Springs Load (Open)	579.0-631.0 N @ 24.5 mm	130-142 lb @ 1.260 in
Oil Pump
	Gear Pocket Depth	15.609-15.584 mm	0.615-0.614 in
	Gear Pocket Diameter	87.065-87.040 mm	3.430-3.429 in
Oil Pump Drive Gear
	Outer Diameter Tolerance	73.415-73.370 mm	2.893-2.891 in
	Width	15.546-15.521 mm	0.613-0.611 in
Oil Pum Driven Gear
	Outer Diameter Tolerance	87.000-86.975 mm	3.428-3.426 in
	Width	15.360-15.511 mm	0.605-0.611 in
	Lobe Inner Diameter - Maximum	11.9 mm	0.469 in
Oil Pump Gear
	Valve to Bore Clearance	14.6-14.575 mm	0.575-0.574 in