MTU — Charge-air coolant – Draining
Maintenance · Coolant circuit (LT)
From a MTU operator's manual covering: 20 V 4000 G23, 20 V 4000 G43, 20 V 4000 G63, 20 V 4000 G83, 20V 4000 G63L, 20V 4000 G83L. Check it applies to your exact model before use.
Applies to: MTU 20 V 4000 G83, MTU 20 V 4000 G23 engine, MTU 20 V 4000 G43 engine, MTU 20 V 4000 G63 engine, MTU 20V 4000 G63L engine, MTU 20V 4000 G83 engine, MTU 20V 4000 G83L engine
Before you start
- Coolant is hot and under pressure.
Procedure
- Provide suitable container.
- Turn breather valve counterclockwise to first stop and remove.
- Draw off segregated corrosion inhibitor oil in expansion tank.
- Open drain valves/plugs and drain coolant at LT coolant pump and LT thermostat housing.
- Drain residual coolant at intercooler.
- Close all drain valves and install drain plugs with new sealing rings.
- Place breather valve on filler neck and close.
Source: MTU operator's 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.