Charge Air Pressure Too High in Turbochargers

Possible Turbocharger-Related Causes

  • Nozzle ring fouled or partially blocked.
  • Nozzle ring deformed.
  • Incorrect Turbocharger specification.

Possible Non-Turbocharger-Related Causes

  • Defective manometer indication
  • Valve leaks
  • Incorrect injection timing
  • Low air intake temperature
  • Engine performance higher than assumed

Damage Limitation Procedures

  • High pressure causes high stress.
  • Keep close observation to make sure the engine runs within all acceptable limits.

Service and Spares Information

  • Clean or replace accordingly. New nozzle ring might be needed. Check area stamped on the ring for identification.
  • Replace with nozzle ring.
  • Please fill out engine matching form to enable us to check engine/ turbocharger match. There is no charge for this service.

For further analysis of your problem please contact us on +44 23 8086 1000 for the TSI Turbo Service International 24-hour Breakdown Emergency Control Centre or email us at

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