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Engine Mechanical - 4.3L: Specifications GMC Savana G2500

Mechanical

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Accelerator Control Cable Bracket Nut12 N.m106 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 Stud10 N.m89 lb in
Air Cleaner Outlet Duct Nut2 N.m18 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 Negative Cable Bolt to Engine25 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 Balancer Remover/Installer Bolt for tool J 23523 - F25 N.m18 lb ft
Crankshaft Bearing Cap Bolt - Preferred Method
First Pass20 N.m15 lb ft
Final Pass73 degrees
Crankshaft Bearing Cap Bolt - Optional Strategy105 N.m77 lb ft
Crankshaft Position Sensor Bolt8 N.m71 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
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 Bolt - Optional On-Vehicle Strategy
First Pass in Sequence35 N.m26 lb ft
Second Pass in Sequence60 N.m44 lb ft
Final Pass in Sequence90 N.m66 lb ft
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 Coolant Drain Hole Plug20 N.m15 lb ft
Engine Block Left Rear Oil Gallery Plug30 N.m22 lb ft
Engine Block Left Side Oil Gallery Plug20 N.m15 lb ft
Engine Block Oil Gallery Plug20 N.m15 lb ft
Engine Block Right Rear 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 Bracket Bolt for tool J 4142715 N.m11 lb ft
Engine Lift Front Bracket Stud35 N.m26 lb ft
Engine Mount Adapter Bolts50 N.m37 lb ft
Engine Mount Heat Shield Bolt6 N.m53 lb in
Engine Mount to Engine Bolts50 N.m37 lb ft
Engine Mount to Frame Bracket Bolts60 N.m44 lb ft
Engine Oil Level Sensor13 N.m111 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 Wiring Harness Bracket Nut to Intake Manifold Stud12 N.m106 lb in
Engine Wiring Harness Retainer Nut to Transmission to Engine Stud10 N.m89 lb in
Evaporative Emission (EVAP) Canister Purge Solenoid Valve Nut to Intake Manifold10 N.m89 lb in
Exhaust Manifold Bolt/Stud
First Pass15 N.m11 lb ft
Final Pass30 N.m22 lb ft
Fan and Water Pump Pulley Bolt25 N.m18 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
Generator and Drive Belt Tensioner Bracket Bolt to Engine41 N.m30 lb ft
Generator and Drive Belt Tensioner Bracket Stud Nut41 N.m30 lb ft
Generator and Drive Belt Tensioner Bracket Stud to Engine20 N.m15 lb ft
Ground Wire Bolt to Rear of Left Cylinder Head10 N.m89 lb in
Ground Wire Nut to Water Outlet Stud10 N.m89 lb in
Ground Wire Stud to Rear of Right Cylinder Head10 N.m89 lb in
Heater Inlet and Outlet Hose Bracket Bolt to Oil Fill Tube Lower Support5 N.m44 lb in
Ignition Coil Stud12 N.m106 lb in
Knock Sensor25 N.m18 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 Fill Tube to Oil Fill Tube Lower Support Bolt5 N.m44 lb in
Oil Fill Tube Lower Support Bolt and Stud25 N.m18 lb ft
Oil Fill Tube Nut12 N.m106 lb in
Oil Filter Adapter Bolt21 N.m15 lb ft
Oil Filter Fitting55 N.m41 lb ft
Oil Level Indicator Tube Bolt12 N.m106 lb in
Oil Level Indicator Tube to Oil Fill Tube Lower Support Bolt5 N.m44 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 Pump Bolt to Rear Crankshaft Bearing Cap90 N.m66 lb ft
Oil Pump Cover Bolt12 N.m106 lb in
Power Brake Booster Vacuum Hose Bracket Nut to Intake Manifold Stud11 N.m97 lb in
Power Steering Pump Bolt50 N.m37 lb ft
Power Steering Pump Bracket Bolt to Engine41 N.m30 lb ft
Power Steering Pump Bracket Stud Nut41 N.m30 lb ft
Power Steering Pump Bracket Stud to Engine20 N.m15 lb ft
Power Steering Pump Rear Bracket Nut to Engine41 N.m30 lb ft
Power Steering Pump Rear Bracket Nut to Power Steering Pump50 N.m37 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 Bolt to Oil Pan9 N.m80 lb in
Throttle Body Stud9 N.m80 lb in
Transmission Bolt to Oil Pan47 N.m35 lb ft
Transmission Control Cable Bracket Bolt40 N.m30 lb ft
Transmission Cover Bolt12 N.m106 lb in
Transmission Fluid Fill Tube Bolt to Rear of Engine10 N.m89 lb in
Upper Intake Manifold Stud
First Pass5 N.m44 lb in
Final Pass9 N.m80 lb in
Vacuum Brake Booster Hose Bracket Nut11 N.m97 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
Displacement4.3 L262 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 - Production0.008 mm0.0003 in
Connecting Rod Journal Out-of-Round - Service0.025 mm0.0010 in
Connecting Rod Journal Taper - Production0.010 mm0.0004 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 Capacity for C/K, G/H with Filter4.3 L4.5 qt
Oil Capacity for C/K, G/H without Filter3.8 L4 qt
Oil Capacity for S/T, M/L with Filter4.7 L5 qt
Oil Capacity for S/T, M/L without Filter4.3 L4.5 qt
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

Torque Values and/or Fastener Tightening Strategies

Addition of timing tensioner bolt torque

Changed Engine Specifications

No changes for 2004.

More articles — Engine Mechanical - 4.3L