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Engine:

Air Intake
- Filters
  - Inexpensive Alternatives
- "Vacuator" or "Flap" Valve
Block
- Block Heaters
CDR Valve
- Testing
Cooling System
- Coolant Temp Level - Turbodiesels
- Cooling Fan
- Cooling System Care - From the U.S. Army. Requires Adobe Reader (Acrobat)
- Flushing
- Radiators
- Testing for Air Leaks
- Thermal Cycling and Coolant Leaks
- Turbodiesels Run Hotter
- Water Pump Replacement on 6.2L Diesel
Cylinder Heads
- Cracking
- Head Gasket Replacement
Diagnostics
- Scan Tool
Diesel Engines
- 6.2L Diesel Engine Rebuild
- Diagnostic Parameters - 5.7L, 6.2L and 6.5L - Requires Adobe Reader (Acrobat)
- The Diesel Page - Recommended reading for 6.2L and 6.5L Diesel engine information.
- Glowplugs
  - Cold-Starting Modifications
  - Controller
  - Fusible Links - Description
  - Fusible Links - Testing
  - GM Glowplug Components
  - Removing Swollen Glow Plugs
  - Replacement
  - Rusted Plug Removal
  - Starting Modifications - "Wait to Start" Relay Mods and Glowplug Delay. By Allan Madar and Jeff Staud
  - Testing the Glow Plugs
  - Troubleshooting the Glow Plug System
  - Types of Glow Plugs
- Ignition Timing
- "Wait" Light
Emergency Fuel Shutoff Procedure - If the engine doesn't stop running when turned off
"Engine Braking"
Engine Part Numbers
Engine Rebuilding or Replacement
- Swapping for a Duramax, Cummins, Big Block Gas or Any Other Engine
- Tips for Rebuilding
- To a Cummins 5.9L
Exhaust
- Borla Exhaust
- Modifications
Fan
- Checking Fan Clutch
- Fan Clutch Replacement - by Allan Madar
- Fan Removal Without Removing Radiator Stack
- HMMWV Engine Fan diagnostics
- How the Fan Clutch Works
General Engine Products Inc. Engine Support Documents - From AM General, click on "Enter as Guest" below the log-in form
Injector Pumps
- HMMWV Injector Pumps
- How the Stanadyne DB2 Fuel Injection Pump Works
Main Bearing Seal
- 6.2L Main Bearing Seal Replacement - A Microsoft Word document
- 6.2L Main Bearing Seal Replacement - A PDF document
Maintenance - See Parts/Service/Maintenance
Oil/Lubrication
- Analysis
- Dual Oil Filters
- General Information About Oil
- Ninety-Degree (90°) Oil Filter Adapter
  - Kit from SSDiesel Supply
  - Individual Parts Needed for DIY
- Oil Leaks - Tracking Them Down
- Oil Types for Diesel, Gas
- PreLub Plus Install
- Synthetic Lubricants
  - Do you Need Synthetic Motor Oil?
Starting Fluid - Don't Use It on a Diesel!
Starting Problems
- Crank Sensor
- Starting a HMMWV
- Starting When Hot - Diesel
Swapping Engines
- To a Cummins 5.9L
Throttle Position Sensor (TPS)
- Adjusting

The Hummer Knowledge Base is a collection of informative posts from the Hummer Network forums and mailing lists, contributed material and links to outside web sites.
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