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MTU — Cooling pump - Relief bore check

Maintenance

From a MTU operator's manual covering: 12V 2000 G23, 12V 2000 G43, 12V 2000 G63, 12V 2000 G83, 16V 2000 G23, 16V 2000 G43, 16V 2000 G63, 16V 2000 G83, 18V 2000 G63, 18V 2000 G83. Check it applies to your exact model before use.

Applies to: MTU 12V 2000 G43 engine, MTU 12V 2000 G83 engine, MTU 16V 2000 G43 engine, MTU 16V 2000 G83 engine, MTU 18V 2000 G83 engine

Before you start

  • Unguarded rotating and moving engine components.
  • Engine noise above 85 dB (A).

Procedure

  1. Check relief bore for oil and water discharge.
  2. Stop engine and disable engine start.
  3. Clean the relief bore with a wire if dirty.
  4. Permissible coolant discharge up to 10 drops/hour; permissible oil discharge up to 5 drops/hour.
  5. If discharge exceeds specified limits, contact Service.

Specs & values

  • Permissible coolant discharge up to 10 drops/hour
  • Permissible oil discharge up to 5 drops/hour

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.

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