Avoid costly rework and coolant contamination. Follow this professional procedure to correctly service Detroit Diesel DD5 injector cups using the ATC W93658900700 tool.

Why DD5 Injector Cups Fail

Over time, the repeated heating and cooling of the Detroit DD5 engine can cause injector sleeves to lose their tension or become pitted by cavitation. When fuel enters the coolant—or vice versa—sleeve replacement is mandatory. The ATC W93658900700 provides the mechanical advantage needed to pull these sleeves vertically without "walking" or scoring the head.

Phase 1-5: The Removal Process

1. Drain the Coolant: Ensure the coolant level is below the cylinder head to prevent flooding the cylinders upon sleeve removal.
2. Clean the Cup: Clear any loose carbon from the internal diameter of the injector cup to ensure a firm tool grip.
3. Expand the Jaws: Lower the ATC W93658900700 into the cup and tighten the mandrel to expand the 2-part jaws securely.
4. Controlled Pull: Apply linear extraction force. The wide jaw engagement prevents the tool from stripping out of the sleeve.
5. Bore Inspection: Once the cup is out, inspect the cylinder head bore for pitting or debris that could compromise the new seal.

Phase 6-10: Installation & Verification

6. Prep the New Cup: Clean the new injector sleeve and apply the recommended sealant or lubricant as per OEM specs.
7. Align with ATC Tool: Place the new cup on the installation end of the W93658900700.
8. Seat the Cup: Drive the cup into the head bore. The tool ensures it stays perfectly square to the bore.
9. Depth Check: Verify the cup is seated to the correct depth to ensure proper injector nozzle protrusion.
10. Pressure Test: Before reinstalling injectors, pressure test the cooling system to verify the new seals are holding.

Pro Warnings: Avoid These DD5 Service Mistakes

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