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Engine Mechanical - 4.3L: Specifications Chevrolet Silverado 1500 HD

Mechanical 9 illustrations ~397 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Accelerator Control Cable Bracket Nut to Stud12 N.m106 lb in
Accelerator Control Cable Bracket Nut to Throttle Body9 N.m80 lb in
Accelerator Control Cable Bracket Stud to Intake Manifold6 N.m53 lb in
Accelerator Control Cable Bracket Stud to Throttle Body12 N.m106 lb in
Air Cleaner Adapter Stud8 N.m71 lb in
Balance Shaft Driven Gear Bolt
First Pass20 N.m15 lb ft
Final Pass35 degrees
Balance Shaft Retainer Bolt12 N.m106 lb in
Battery Cable Bracket Bolt to Oil Pan12 N.m106 lb in
Battery Negative Cable Bolt to Engine25 N.m18 lb ft
Battery Positive Cable Junction Block Bracket Bolt25 N.m18 lb ft
Belt Idler Pulley Bolt50 N.m37 lb ft
Camshaft Retainer Bolt12 N.m106 lb in
Camshaft Sprocket Bolt25 N.m18 lb ft
Connecting Rod Nut
First Pass27 N.m20 lb ft
Final Pass70 degrees
Crankshaft Balancer Bolt95 N.m70 lb ft
Crankshaft Bearing Cap Bolt - Preferred Method
First Pass20 N.m15 lb ft
Final Pass73 degrees
Crankshaft Bearing Cap Bolt105 N.m77 lb ft
Crankshaft Position Sensor Bolt9 N.m80 lb in
Crankshaft Pulley Bolt58 N.m43 lb ft
Crankshaft Rear Oil Seal Housing Bolt and Nut12 N.m106 lb in
Crankshaft Rear Oil Seal Housing Retainer Stud6 N.m53 lb in
Crossmember Bolt100 N.m74 lb ft
Cylinder Head Bolt - Preferred Method
All Bolts First Pass in Sequence30 N.m22 lb ft
Long Bolts Final Pass in Sequence75 degrees
Medium Bolts Final Pass in Sequence65 degrees
Short Bolts Final Pass in Sequence55 degrees
Cylinder Head Core Hole Plug20 N.m15 lb ft
Distributor Cap Bolt2.4 N.m21 lb in
Distributor Clamp Bolt25 N.m18 lb ft
Drive Belt Idler Pulley Bolt50 N.m37 lb ft
Drive Belt Tensioner Bolt50 N.m37 lb ft
Engine Block Left Side Oil Gallery Plug20 N.m15 lb ft
Engine Block Left Rear Oil Gallery Plug30 N.m22 lb ft
Engine Block Right Rear Oil Gallery Plug20 N.m15 lb ft
Engine Block Coolant Drain Hole Plug20 N.m15 lb ft
Engine Block Oil Gallery Plug20 N.m15 lb ft
Engine Coolant Heater Bolt/Screw2 N.m18 lb in
Engine Coolant Temperature (ECT) Sensor20 N.m15 lb ft
Engine Flywheel Bolt100 N.m74 lb ft
Engine Front Cover Bolt12 N.m106 lb in
Engine Lift Front Bracket Stud35 N.m26 lb ft
Engine Mount Bolt to Engine Bracket50 N.m37 lb ft
Engine Mount Engine Bracket Bolt to Engine50 N.m37 lb ft
Engine Mount Frame Bracket Through-bolt75 N.m55 lb ft
Engine Mount Frame Side Mount Bolt65 N.m50 lb ft
Engine Oil Level Sensor13 N.m115 lb in
Engine Oil Pressure Gage Sensor30 N.m22 lb ft
Engine Oil Pressure Gage Sensor Fitting - Plus Required Angle15 N.m11 lb ft
Engine Shield Bolt20 N.m15 lb ft
Engine Wiring Harness Bracket Bolt to Battery Positive Cable Junction Block Bracket9 N.m80 lb in
Engine Wiring Harness Bracket Bolt to Generator and Drive Belt Tensioner Bracket25 N.m18 lb ft
Engine Wiring Harness Bracket Nut to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Stud9 N.m80 lb in
Engine Wiring Harness Bracket Nut to Intake Manifold Stud12 N.m106 lb in
Engine Wiring Harness Bracket Stud25 N.m18 lb ft
Engine Wiring Harness Clip Bolt9 N.m80 lb in
Engine Wiring Harness Ground Nut16 N.m12 lb ft
Evaporative Emission (EVAP) Canister Purge Solenoid Valve Stud to Intake Manifold10 N.m89 lb in
Exhaust Manifold Bolt/Stud
First Pass15 N.m11 lb ft
Final Pass30 N.m22 lb ft
Exhaust Manifold Heat Shield Bolt9 N.m80 lb in
Fan and Water Pump Pulley Bolt25 N.m18 lb ft
Frame Cross Bar Bolt100 N.m74 lb ft
Fuel Meter Body Bracket Bolt10 N.m89 lb in
Fuel Pipe Bracket Bolt6 N.m53 lb in
Fuel Pipe Retainer Nut3 N.m27 lb in
Fuel Supply Pipe Nut - Fuel Tank Side30 N.m22 lb ft
Generator and Drive Belt Tensioner Bracket Bolt to Engine41 N.m30 lb ft
Generator and Drive Belt Tensioner Bracket Stud to Engine20 N.m15 lb ft
Generator and Drive Belt Tensioner Bracket Stud Nut41 N.m30 lb ft
Ground Wire Bolt to Rear of Left Side Cylinder Head16 N.m12 lb ft
Ground Wire Nut to Rear of Right Side Cylinder Head16 N.m12 lb ft
Heater Hose Bracket Bolt to Generator and Drive Belt Tensioner Bracket25 N.m18 lb ft
Hood Hinge Bolt25 N.m18 lb ft
Ignition Coil Stud12 N.m106 lb in
Junction Block Bracket Bolt25 N.m18 lb ft
Knock Sensor25 N.m18 lb ft
Lift Bracket Bolts15 N.m11 lb ft
Lower Intake Manifold Bolt
First Pass in Sequence3 N.m27 lb in
Second Pass in Sequence12 N.m106 lb in
Final Pass in Sequence15 N.m11 lb ft
Oil Cooler Pipe Bracket to Oil Pan Bolt12 N.m106 lb in
Oil Filter30 N.m22 lb ft
Oil Filter Adapter55 N.m41 lb ft
Oil Filter Fitting55 N.m41 lb ft
Oil Level Indicator Tube Bolt12 N.m106 lb in
Oil Pan Baffle Bolt12 N.m106 lb in
Oil Pan Bolt and Nut25 N.m18 lb ft
Oil Pan Drain Plug25 N.m18 lb ft
Oil Pan Skid Plate Bolt20 N.m15 lb ft
Oil Pump Bolt to Rear Crankshaft Bearing Cap90 N.m66 lb ft
Oil Pump Cover Bolt12 N.m106 lb in
Positive Battery Cable Clip Bolt9 N.m80 lb in
Positive Cable Generator Nut18 N.m13 lb ft
Power Steering Pump Bracket Bolt to Engine41 N.m30 lb ft
Power Steering Pump Bracket Stud to Engine20 N.m15 lb ft
Power Steering Pump Bracket Stud Nut41 N.m30 lb ft
Power Steering Pump Bolt50 N.m37 lb ft
Power Steering Pump Nut to Engine - Rear Bracket to Engine41 N.m30 lb ft
Power Steering Pump Rear Bracket Nut50 N.m37 lb ft
Secondary Air Injection (AIR) Check Valve Pipe Bracket Bolt to Exhaust Manifold10 N.m89 lb in
Secondary Air Injection (AIR) Check Valve Pipe Stud Nut25 N.m18 lb ft
Spark Plug
Initial Installation - NEW Cylinder Head30 N.m22 lb ft
All Subsequent Installations15 N.m11 lb ft
Spark Plug Wire Support Bolt12 N.m106 lb in
Starter Motor Wiring Harness/Transmission Cooler Pipe Bracket to Oil Pan Bolt9 N.m80 lb in
Throttle Body Stud9 N.m80 lb in
Torque Converter Bolt63 N.m47 lb ft
Transmission Bolt50 N.m37 lb ft
Transmission Cover Bolt12 N.m106 lb in
Transmission Oil Cooler Line Bracket9 N.m80 lb in
Transmission to Oil Pan Bolt47 N.m35 lb ft
Upper Intake Manifold Stud
First Pass5 N.m44 lb in
Final Pass9 N.m80 lb in
Valve Lifter Pushrod Guide Bolt16 N.m12 lb ft
Valve Rocker Arm Bolt30 N.m22 lb ft
Valve Rocker Arm Cover Bolt12 N.m106 lb in
Water Outlet Stud25 N.m18 lb ft
Water Pump Bolt45 N.m33 lb ft

FASTENER TIGHTENING SPECIFICATIONS

Engine Mechanical Specifications

ApplicationSpecification
MetricEnglish
General
Engine Type90 degree V6
Displacement4.3L262 CID
RPOLU3
VINX
Bore101.60 mm4.012 in
Stroke88.39 mm3.480 in
Compression Ratio9.2:1
Firing Order1-6-5-4-3-2
Spark Plug Gap1.52 mm0.060 in
Balance Shaft
Bearing Journal Diameter - Rear38.085-38.100 mm1.4994-1.500 in
Bushing Bore Diameter - Rear0.050-0.088 mm0.0020-0.0035 in
Block
Crankshaft Main Bearing Bore Out-of-Round0.050 mm0.002 in
Cylinder Bore Diameter101.618-101.643 mm4.0007-4.0017 in
Cylinder Bore Out-of-Round - Production0.017 mm0.0007 in
Cylinder Bore Out-of-Round - Service0.05 mm0.002 in
Cylinder Bore Taper - Production Relief Side0.025 mm0.0010 in
Cylinder Bore Taper - Production Thrust Side0.012 mm0.0005 in
Cylinder Bore Taper - Service0.025 mm0.0010 in
Cylinder Head Deck Surface Flatness0.050-0.152 mm0.002-0.006 in
Camshaft
Camshaft End Play0.0254-0.2286 mm0.0010-0.0090 in
Camshaft Journal Diameter47.440-47.490 mm1.8677-1.8696 in
Camshaft Journal Out-of-Round0.025 mm0.001 in
Camshaft Lobe Lift - Exhaust7.20-7.30 mm0.283-0.287 in
Camshaft Lobe Lift - Intake6.97-7.07 mm0.274-0.278 in
Camshaft Runout0.065 mm0.0026 in
Connecting Rod
Connecting Rod Bearing Clearance - Production0.038-0.078 mm0.0015-0.0031 in
Connecting Rod Bearing Clearance - Service0.025-0.063 mm0.0010-0.0025 in
Connecting Rod Side Clearance0.15-0.44 mm0.006-0.017 in
Crankshaft
Connecting Rod Journal Diameter57.116-57.148 mm2.2487-2.2497 in
Connecting Rod Journal Out-of-Round - Production0.005 mm0.0002 in
Connecting Rod Journal Out-of-Round - Service0.025 mm0.0010 in
Connecting Rod Journal Taper - Production0.00508 mm0.00030 in
Connecting Rod Journal Taper - Service0.025 mm0.0010 in
Crankshaft End Play0.050-0.20 mm0.002-0.008 in
Crankshaft Main Bearing Clearance #1 - Production0.02-0.05 mm0.0008-0.0020 in
Crankshaft Main Bearing Clearance #2, #3, and #4 - Production0.028-0.058 mm0.0011-0.0023 in
Crankshaft Main Bearing Clearance #1 - Service0.0254-0.05 mm0.0010-0.0020 in
Crankshaft Main Bearing Clearance #2, #3, and #4 - Service0.025-0.063 mm0.0010-0.0025 in
Crankshaft Main Journal Diameter #162.199-62.217 mm2.4488-2.4495 in
Crankshaft Main Journal Diameter #2 and #362.191-62.215 mm2.4485-2.4494 in
Crankshaft Main Journal Diameter #462.179-62.203 mm2.4480-2.4489 in
Crankshaft Main Journal Out-of-Round Production0.005 mm0.0002 in
Crankshaft Main Journal Out-of-Round Service0.025 mm0.0010 in
Crankshaft Main Journal Taper0.007 mm0.0003 in
Exhaust Manifold
Surface Flatness - Flange to Flange0.25 mm0.010 in
Surface Flatness - Individual Flange0.05 mm0.002 in
Intake Manifold
Surface Flatness0.10 mm0.004 in
Lubrication System
Oil Pressure - at 1,000 RPM42 kPa6 psi
Oil Pressure - at 2,000 RPM125 kPa18 psi
Oil Pressure - at 4,000 RPM166 kPa24 psi
Piston Rings
Piston Ring End Gap - First Compression Ring - Production0.25-0.40 mm0.010-0.016 in
Piston Ring End Gap - Second Compression Ring - Production0.38-0.58 mm0.015-0.023 in
Piston Ring End Gap - Oil Control Ring - Production0.25-0.76 mm0.010-0.029 in
Piston Ring End Gap - First Compression Ring - Service0.25-0.50 mm0.010-0.020 in
Piston Ring End Gap - Second Compression Ring - Service0.38-0.80 mm0.015-0.031 in
Piston Ring End Gap - Oil Control Ring - Service0.005-0.090 mm0.0002-0.0035 in
Piston Ring to Groove Clearance - First Compression Ring - Production0.030-0.070 mm0.0012-0.0027 in
Piston Ring to Groove Clearance - Second Compression Ring - Production0.076-0.280 mm0.0030-0.0110 in
Piston Ring to Groove Clearance - Oil Control Ring - Production0.046-0.196 mm0.0018-0.0077 in
Piston Ring to Groove Clearance - First Compression Ring - Service0.030-0.085 mm0.0012-0.0033 in
Piston Ring to Groove Clearance - Second Compression Ring - Service0.030-0.085 mm0.0012-0.0033 in
Piston Ring to Groove Clearance - Oil Control Ring - Service0.076-0.200 mm0.0030-0.0079 in
Pistons and Pins
Piston - Piston to Bore Clearance - Production0.018-0.061 mm0.0007-0.0024 in
Piston - Piston to Bore Clearance Service0.075 mm0.0029 in
Pin - Piston Pin Clearance to Connecting Rod Bore - Press Fit0.012-0.048 mm0.0005-0.0019 in
Pin - Piston Pin Clearance to Piston Pin Bore - Production0.013-0.023 mm0.0005-0.0009 in
Pin - Piston Pin Clearance to Piston Pin Bore - Service0.025 mm0.0010 in
Pin - Piston Pin Diameter23.545-23.548 mm0.9270-0.9271 in
Valve System
Valves - Valve Face Angle45 degrees
Valves - Valve Seat Angle46 degrees
Valves - Valve Seat Runout0.05 mm0.002 in
Valves - Valve Seat Width - Intake1.016-1.651 mm0.040-0.065 in
Valves - Valve Seat Width - Exhaust1.651-2.489 mm0.065-0.098 in
Valves - Valve Stem Oil Seal Installed Height1-2 mm0.03937-0.07874 in
Valves - Valve Stem-to-Guide Clearance - Intake - Production0.025-0.069 mm0.0010-0.0027 in
Valves - Valve Stem-to-Guide Clearance - Intake - Service0.025-0.094 mm0.0010-0.0037 in
Valves - Valve Stem-to-Guide Clearance - Exhaust - Production0.025-0.069 mm0.0010-0.0027 in
Valves - Valve Stem-to-Guide Clearance - Exhaust - Service0.025-0.094 mm0.0010-0.0037 in
Rocker Arms - Valve Rocker Arm Ratio1.5:1
Valve Springs - Valve Spring Free Length51.3 mm2.02 in
Valve Springs - Valve Spring Installed Height - Intake42.92-43.43 mm1.670-1.700 in
Valve Springs - Valve Spring Installed Height - Exhaust42.92-43.43 mm1.670-1.700 in
Valve Springs - Valve Spring Load - Closed338-374 N @ 43.2 mm76-84 lb @ 1.70 in
Valve Springs - Valve Spring Load - Open832-903 N @ 32.3 mm187-203 lb @ 1.27 in

ENGINE MECHANICAL SPECIFICATIONS

Scheme 55

Scheme 55: Sealers, Adhesives, and Lubricants
Scheme 55: Sealers, Adhesives, and Lubricants

Scheme 56

Scheme 56: Disassembled Views
Scheme 56: Disassembled Views

Scheme 57

Scheme 57
Scheme 57

Scheme 58

Scheme 58
Scheme 58

Scheme 59

Scheme 59
Scheme 59

Scheme 60

Scheme 60
Scheme 60

Scheme 61

Scheme 61: Engine Identification
Scheme 61: Engine Identification

Scheme 62

Scheme 62
Scheme 62

Scheme 63

Scheme 63
Scheme 63
  1. The Vehicle Identification Number (VIN) Derivative is located on the left side rear of the engine block (1) or on the right side rear (2) and typically is a nine digit number stamped or laser etched onto the engine at the vehicle assembly plant. The first digit identifies the division. The second digit identifies the model year. The third digit identifies the assembly plant. The fourth through ninth digits are the last six digits of the Vehicle Identification Number (VIN).
  2. Engines built at the Tonawanda engine plant have the engine identification number located at the right front top of the engine block. The first digit (1) is the source code. The second and third digits (2) are the month of build. The forth and fifth digits (3) are the date of build. The sixth, seventh, and eighth digits (4) are the broadcast code.
  3. Engines built at the Romulus engine plant have the engine identification number located at the right front top of the engine block. The first digit (1) is the source code. The second and third digits (2) are the month of build. The fourth digit (3) is the hour of the build. The fifth and sixth digits (4) are the date of build. The seventh, eighth, and ninth digits (5) are the broadcast code.

Torque Values and/or Fastener Tightening Strategies

  1. Cylinder head bolts, the crankshaft bearing cap bolts, the connecting rod bolts, and balance shaft bolt apply a torque angle strategy. In an on-vehicle situation where a torque angle meter may not fit into the vehicle packaging, a three step tightening process may be followed using a torque wrench.
  2. Certain fasteners should not be reused. Bolts, studs, or other fasteners that must be replaced will be called out in the specific service procedure.

Changed Engine Specifications

  1. Crankshaft Main Bearing Bore Out-of-Round spec is now 0.05 mm (0.002 in).
  2. Cylinder Bore Out-of-Round-Production spec is now 0.017 mm (0.0007 in).
  3. Cylinder Head Deck Surface Flatness spec is now 0.050-0.152 mm (0.002-0.006 in).
  4. Piston Ring-to-Groove Clearance-Second Compression Ring-Production spec is now 0.076-0.280 mm (0.0030-0.0110 in).
  5. Piston Ring-to-Groove Clearance-Oil Control Ring-Service spec is now 0.076-0.200 mm (0.0030-0.0079 in).

See also:
• JACKING AND LIFTING

More articles — Engine Mechanical - 4.3L