Cummins ISF3.8 CM2220, CM2220-AN & CM2220-IAN Engine Workshop Service Manual

This is the workshop service manual for the Cummins ISF3.8, the 3.8 litre four-cylinder used in medium-duty trucks, buses and light commercial vehicles.

It covers complete disassembly and reassembly, cylinder head, block, crankshaft and piston service, the common rail fuel system, cooling and lubrication, torque specs and service limits, and reference information for the CM2220, CM2220-AN and CM2220-IAN control modules.

What the manual covers

• Complete disassembly and reassembly
• Cylinder head, block, crankshaft and piston service
• Common rail fuel system service
• Cooling and lubrication systems
• Torque specifications and service limits
• CM2220, CM2220-AN and CM2220-IAN control reference

Compatibility

• Models: ISF3.8 with CM2220, ISF3.8 with CM2220-AN, ISF3.8 with CM2220-IAN
• Engine: 3.8 L inline four
• Control module: CM2220, CM2220-AN or CM2220-IAN
• Manual type: Workshop service manual

Before you buy

This is the mechanical repair manual for the engine. For electronic fault codes, you'll want an electronic control system troubleshooting manual as well.

Your engine's dataplate shows the engine model, the engine serial number (ESN) and the CPL number. Compare those with the models above. If you're not sure, email us the dataplate details and we'll check for you.

File format

Digital download, delivered as a ZIP file. Unzip it before opening. Opens on a computer, tablet or phone.

We're an independent seller and are not affiliated with or endorsed by Cummins. Brand and model names are used only to identify the engines this manual covers.