4.3L Engine Guide

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Guide covering the Chevrolet/GMC 4.3L Engine

Text of 4.3L Engine Guide

Application Manual

Gasoline 4.3L V6 90 Degree 2001 Model Year

General Motors Powertrain Group

ENGINE APPLICATION MANUALGasoline 4.3L V6 90 Degree

GM PowertrainRevised: 08/15/2000

ENGINE APPLICATION MANUAL

Gasoline 4.3L V6 90 Degree Engines RPO : L35

Model Year: 2001

General Motors Powertrain Group 895 Joslyn Ave MC: 480-710-225 Pontiac MI 48340

Contact:Luis Nespolo - (248) 857-1558

Printed: 8/15/00

i

ENGINE APPLICATION MANUALGasoline 4.3L V6 90 Degree

GM PowertrainRevised: 08/15/2000

1.0

INTRODUCTION

This manual assists the reader in the application of the 4.3L V6 90 Degree family of engines to Transportation Vehicles, Marine and Industrial applications. It gives an overview of the engine, its features, and systems. Details are provided on typical interfaces between the engine, related subsystems, and the vehicle. Caution: The performance of the engine is dependent on the specific application. It is recommended that the owner of this document be contacted before specific application decisions are made.

2.0

PRODUCTSUMMARYAPPEARANCE

2.1

The figure 2.1-I shows the 4.3L V6 90 Degree Engine.

L35 Isometric ViewFigure: 2.1-I 2.2 FEATURES

The model year 2001 for 4.3L V6 90 Degree Engine has one version: L35. This Engine has specific values of power and torque, which allow for a very wide range of application up to 15000 Lbs. GVW. The more distinctive common features of this family of engines are: -Optimized Intake Manifold -Stiff Oil Sump -High reliability and durability -OBDII compliant

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Printed: 8/15/00

ENGINE APPLICATION MANUALGasoline 4.3L V6 90 Degree 2.3 PRODUCT SPECIFICATION SUMMARY

GM PowertrainRevised: 08/15/2000

2.3.1 SPECIFICATIONENGINE L35 Truck Application L35 Marine Application 223 4800 275 3800 1000 0 0 5000 5200 5200 (-40) N/A 650 -20 4 Cycle Naturally Aspirated V 90 6 OHV 2 4302 101.6 88.4 9.4:1 1-6-5-4-3-2 CW Electronic N/A 200 41-932 (0.060) PF-52 Electronic UNITS

PERFORMANCE Rated Power Rate Power Speed Rated Torque Rated Torque Speed Torque Extension Speed Range (From Peak Torque to Peak Power) Exhaust Restriction at Rated Power (Better than) Inlet Restriction at Rated Power w/Filter Redline Speed Fuel Cut-Off Speed, Nominal Conditions Fuel Cut-Off Speed, Cold Conditions Maximum Upshift Speed Minimum Idle Speed Minimum Unassisted Start Temperature PHYSICAL/CONTENT Type: Service Type Configuration: Bank Angle: Number of Cylinders: Valvetrain Configuration: Number of Valves per Cylinder: Displacement: Bore: Stroke: Compression Ratio: Firing Order: Rotational Direction: Fuel Injection Pump Certification Engine Mass Spark Plugs Oil Filter Controller SubSystems Air Intake Subsystem Throttle Body Type Max Air Flow Rate: Intake manifold : Lower Intake: Upper Intake:File: c:\data\manuales\v6-truck\am43v6#3.doc Contact:Luis Nespolo - (248) 857-1558

200 4600 260 2800 1800 8.85 to 8.58 @ 4600 rpm -0.89 @ 4600 rpm 5000 5200 5200 (-40) 5100 Man - 5200 Auto 525 -20 4 Cycle Naturally Aspirated V 90 6 OHV 2 4302 101.6 88.4 9.4:1 1-6-5-4-3-2 CW Electronic Federal & California 200 41-932 (0.060) PF-52 Electronic

hp rpm Lb. ft rpm rpm in hg Piezometer in hg Piezometer rpm rpm rpm rpm rpm Degree C

Degree

cc.cm mm mm

Kg

SCPISequential Central Port Injection

SCPISequential Central Port Injection

158@ 4600 rpm Symmetrical Runner Aluminum Composite

158@ 4600 rpm Symmetrical Runner Aluminum Composite

Gr/sec

2

Printed: 8/15/00

ENGINE APPLICATION MANUALGasoline 4.3L V6 90 Degree

GM PowertrainRevised: 08/15/2000

ENGINE

L35 Truck Application

L35 Marine Application

UNITS

Cylinder Head Subsystem Cylinder Head Material Cylinder Head Type: Valves Actuation: Rocker Arm Ratio Valve Train Valves per Cylinder: Valves Angle from Vertical: Lifters - Type Valve Guides Intake Valves Material Head Diameter Stem Diameter Length Seats Lift Exhaust Valves Material 3140 Welded Tip Head Diameter Stem Diameter Length Seats Lift Main Block Subsystem Block Assembly: Material Cylinders Lower Structure Bore Spacing Deck Height Connecting rods: Material Length Bolts Bearings Rod Length to Stroke Ratio Piston Type Material Weight

Cast-Iron GM232-M OHV Push Rod 1.5:1 2 15 Hydraulic Roller Cast Iron 1541 Steel 49.3 7.965 123.68 45 Degree 11.2 21 - 4N Stainless Steel with 3140 Welded Tip 38.1 7.965 124.84 45 Degree 11.0

Cast-Iron GM232-M OHV Push Rod 1.5:1 2 15 Hydraulic Roller Cast Iron 1541 Steel 49.3 7.965 123.68 45 Degree 11.2 21 - 4N Stainless Steel with 38.1 7.965 124.84 45 Degree 11.0 mm mm

Degree

mm mm mm mm

mm

Cast-Iron GM232-M Cast Iron Four main bearing Supports 111.76 234.7 Forged-SAE 1141 154.9 9 Aluminum Tin Silicon Alloy 1.68:1 Strutless Flat Top Eutectic Cast Aluminum Alloy 437

Cast-Iron GM232-M Cast Iron Four main bearing Supports 111.76 234.7 Forged-SAE 1141 154.9 9 Aluminum Tin Silicon Alloy 1.68:1 Strutless Flat Top Eutectic Cast Aluminum Alloy 437

mm mm

mm mm

Cam Turned

Gr

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Printed: 8/15/00

ENGINE APPLICATION MANUALGasoline 4.3L V6 90 Degree

GM PowertrainRevised: 08/15/2000

ENGINE

L35 Truck Application

L35 Marine Application Fixed 24X70 Steel SAE 1019 2 Steel Barrel 1.5mm Cast Iron 1.5 mm 1 Low Tension 3 Pieces Plated Steel 5150 Steel Billet Gun Drilled 39.4 3/8 -33 BTDC 286 ATDC -271 BTDC 48 TDC Steel Backed Copper/Lead Super Clean Cr-Si Double Shot Peened 4.6 mm Round 356 65

UNITS

Piston Pins Type Material Piston Rings Compression Rings Number: Top Compression Second Compression Oil Control Rings Number Type Material Camshaft Material Description Base Circle Diameter: Drive Chain Pitch Roller Camshaft Valve Timing: Intake Valve........Opens Closes Exhaust Valve.....Opens Closes Camshaft Bearings Valve Springs Material Type Dimension Closed (Valve Closed) Open (Rate) Crankshaft Material Number of Counterweights Main Journal Diameter Crank Pin Journal Diameter Bearings Torsional Damper Crankcase Ventilation

Fixed 24X70 Steel SAE 1019 2 Steel Barrel 1.5mm Cast Iron 1.5 mm 1 Low Tension 3 Pieces Plated Steel 5150 Steel Billet Gun Drilled 39.4 3/8 -33 BTDC 286 ATDC -271 BTDC 48 TDC Steel Backed Copper/Lead Super Clean Cr-Si Double Shot Peened 4.6 mm Round 356 65

mm

Mm

Crk Degree Crk Degree Crk Degree Crk Degree

Newtons Newtons/mm

Cast Nodular Cast Nodular Undercut Rolled Fillet Undercut Rolled Fillet 6 6 62.2 62.2 Mm 57.1 57.1 Mm Aluminum Tin Aluminum Tin Silicon Alloy Silicon Alloy Ring Inertia Ring Inertia Rubber Mounted Negative Closed Negative Closed(Vacuum created from Intake Manifold) (Vacuum created from Intake Manifold)

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Printed: 8/15/00

ENGINE APPLICATION MANUALGasoline 4.3L V6 90 Degree

GM PowertrainRevised: 08/15/2000

ENGINE

L35 Truck Application

L35 Marine Application First Order Nodular Cast CCW Same as Crank. Helical Gear 14 Off Cam Pressure Pressure Splash Pressure Pressure Splash Splash Hollow Push Rod 5W-30W Mineral 4.5 4.0 Full Flow PF-47 0.3 Spur Gear 40-45 psi 20-25 psi 2 Camshaft

UNITS

Balance Shaft Type Material Rotation Speed Drive Oil Lubrication Main and Rod Bearings Camshaft Timing Gear Connecting Rods Valve Mechanism Cylinder Walls Piston & Pins Cylinder Head Oil Capacity Oil W/ Filter W/o Filter Oil Filter Type Capacity Oil Pump Type Normal Pressure Idle Pressure Oil Flow @ 1000 RPM Drive Fuel Injection System Mean Features Injection Pump Make Type Model Injection Timing Operating Pressure Opening Pressure Fuel Pump Fuel Pump Make Type Minimum Fuel Flow Maximum Fuel Flow Fuel Pump Voltage Range Fuel Pump Pressure Fuel Filter Type Material

First Order Nodular Cast CCW Same as Crank. Helical Gear 14 Off Cam Pressure Pressure Splash Pressure Pressure Splash Splash Hollow Push Rod 5W-30W Mineral 4.5 4.0 Full Flow PF-47 0.3 Spur Gear 40-45 psi 20-25 psi 2 Camshaft

N/a N/a N/a N/a N/a N/a N/a N/a

N/a Qts Qts N/a Qts N/a @ 2000 RPM @ Idle GPM N/a

Delphi Top Feed SCFI Sequential 425 +/- 9 285 +/- 9 Delphi 44MM -G-Rotor 25 TBD 6-12 425 Delphi Full Recirculation Nylon 66

Delphi Top Feed SCFI Sequential 425 +/- 9 285 +/- 9 Delphi 44MM G-Rotor 25 TBD 6-12 425 Delphi Full Recirculation Nylon 66

KPa KPa

Gram/Sec Gram/Sec Volts Kpa

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Printed: 8/15/00

ENGINE APPLICATION MANUALGasoline 4.3L V6 90 Degree

GM PowertrainRevised: 08/15/2000

ENGINE

L35 Truck Application Delphi Cartridge 425 Delphi 87 Centrifugal 76.5 262 180 262 Ball/Roller Cast iron Cast iron External Yes Yes No No Deaeration Tank Bypass CCW 1.25

Regulator Nominal Pressure Injectors Recommended Fuel Water Pump Type: Water Pump Maximum Flow @ Engine RPM: Maximum Sustained Coolant Temperature: Thermostat Setting Starts to Open Full Open Bearing Type Impeller Material Housing Material By Pass Recirculation Type Water Jackets full length of Cylinder Water Jackets all around Cylinder Water Jackets open at head face Surge Tank System Coolant Fill LocationDeaeration Tank Circulation Thermostat Type - direction of rotation : - drive ratio (relative to crankshaft)

L35 Marine Application Delphi Cartridge 425 Delphi 87 Centrifugal 76.5 262