Detroit Diesel — EGR Cooler Cleaning to Remove Excess Fuel After Engine Brake Solenoid Failure (DD13)
Maintenance
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Do not exceed 40 psi (276 kPa) air pressure. Wear eye protection.
- This procedure must be followed after replacing an engine brake solenoid to prevent severe engine damage.
Procedure
- Remove marmon clamps and EGR hot pipe; inspect for liquid or moisture.
- If liquid/moisture present, continue; if not, install hot pipe and no further action required.
- Remove the mixer pipe from the cold boost pipe.
- Remove the exhaust gas crossover tube/lifting eye and venturi.
- Place a towel over the outlet of the EGR cooler and retain with a zip tie.
- Using a rubber tipped blow gun, blow compressed shop air into the individual EGR cooler tubes.
- Reinstall mixer pipe, exhaust gas crossover tube/lifting eye, and venturi.
- If cooler has excessive buildup that cannot be removed, replace the EGR cooler.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.