Detroit Diesel — Removal of the DD15 & DD16 Water Manifold
Repair & overhaul
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Hold water manifold doser coolant line fitting with a separate wrench while removing the coolant lines.
Procedure
- Disconnect the batteries and drain the engine coolant.
- Remove air cleaner, exhaust manifold heat shields, and EGR hot pipe.
- Disconnect and remove doser coolant lines and retaining clips.
- Disconnect EGR cooler vent line and outlet coolant temperature sensor connector.
- Remove EGR actuator coolant outlet line and upper radiator hose.
- Remove four coolant outlet elbow bolts; remove elbow and discard gasket.
- Remove EGR cooler.
- Remove eleven upper water manifold bolts and loosen six lower water manifold bolts.
- Remove two bolts from the retaining strap; remove water manifold.
- Remove and discard water manifold gaskets.
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.