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ENGINE APPLICATION MANUAL GM Powertrain
Gasoline 4.3L V6 90 Degree Revised: 08/15/2000
File: c:\data\manuales\v6-truck\am43v6#3.doc
Contact:Luis Nespolo - (248) 857-1558 Printed: 8/15/00
4
Piston Pins
Type - Fixed 24X70 Fixed 24X70 mm
Material - Steel SAE 1019 Steel SAE 1019
Piston Rings
Compression Rings Number: 2 2
Top Compression Steel Barrel Steel Barrel
1.5mm 1.5mm
Second Compression Cast Iron Cast Iron
1.5 mm 1.5 mm
Oil Control Rings Number - 1 1
Type - Low Tension Low Tension
3 Pieces 3 Pieces
Material - Plated Steel Plated Steel
Camshaft
Material - 5150 5150
Steel Billet Steel Billet
Description Gun Drilled Gun Drilled
Base Circle Diameter: 39.4 39.4 Mm
Drive Chain Pitch Roller 3/8 3/8
Camshaft Valve Timing:
Intake Valve........Opens -33 -33 Crk Degree
BTDC BTDC
Closes 286 286 Crk Degree
ATDC ATDC
Exhaust Valve.....Opens -271 -271 Crk Degree
BTDC BTDC
Closes 48 48 Crk Degree
TDC TDC
Camshaft Bearings Steel Backed Steel Backed
Copper/Lead Copper/Lead
Valve Springs
Material Super Clean Super Clean
Cr-Si Cr-Si
Type Double Shot Double Shot
Peened Peened
Dimension 4.6 mm 4.6 mm
Round Round
Closed (Valve Closed) 356 356 Newtons
Open (Rate) 65 65 Newtons/mm
Crankshaft
Material - Cast Nodular Cast Nodular
Undercut Rolled Fillet Undercut Rolled Fillet
Number of Counterweights 6 6
Main Journal Diameter - 62.2 62.2 Mm
Crank Pin Journal Diameter 57.1 57.1 Mm
Bearings Aluminum Tin Aluminum Tin
Silicon Alloy Silicon Alloy
Torsional Damper Ring Inertia Ring Inertia Rubber Mounted
Crankcase Ventilation Negative Closed Negative Closed
(Vacuum created from (Vacuum created from
Intake Manifold) Intake Manifold)
ENGINE L35 L35 UNITS
Truck Application Marine
Application