Detroit Diesel — Step 3. Feel
Testing & diagnosis · Turbocharger
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- TO AVOID BEING BURNED, MAKE SURE ENGINE IS NOT RUNNING AND THE TURBINE HAS STOPPED ROTATING AND COOLED DOWN BEFORE FEELING ANY OF THE COMPONENTS OF THE TURBOCHARGER.
Procedure
- After you have made sure the engine is off and disabled, rotate the turbine wheel by hand.
- It should turn smoothly and freely with no signs of binding or scraping.
- Push inward on the turbine wheel as you turn it by hand. Again, it should turn freely.
- Pull outward on the turbine wheel as you turn it, and check for rubbing and scraping.
- If the turbocharger does not move freely, remove it, correct any faults that could harm the replacement turbocharger, and install the replacement unit.
- Pre-lube the replacement turbocharger, shaft and bearings.
- Check the intake and exhaust ducting for foreign material before installing the turbocharger.
- Thoroughly check the oil return, crankcase ventilation system, oil feed lines to the turbocharger, and air filter/induction ducting.
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.