Detroit Diesel — Step 1. Listen
Testing & diagnosis · Turbocharger
From a Detroit Diesel service manual — check it applies to your exact model before use.
Procedure
- Listen to the sound the turbocharger makes.
- A high-pitched whine may indicate an exhaust leak or a leak in the air induction system.
- A cycling up and down in pitch often indicates a blockage in the air inlet duct, a restricted air cleaner, or a build-up of dirt on the compressor wheel or diffusor vanes.
- A sharp, high-pitched scream may indicate that the bearings have deteriorated and one (or both) of the wheels is rubbing on its housing.
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.