Check the turbocharger for:
– Gas leakage between turbocharger and exhaust manifold.
– Bearing clearance (as instructed below).
– Inspect the turbine and compressor wheel for Foreign Object Damage.
Replace the turbocharger if any damage is found on the turbine or compressor wheel.
If any damage is found on the compressor wheel, the complete inlet system must be inspected and cleaned before a new turbo can be installed.
Axial clearance:
1. Place a dial gauge as shown.
Designed to read tolerances at least as small as 0.025 mm (0.001 in).
2. Set the dial gauge to zero.
3. Push and pull the rotor assembly and make a note of the minimum and maximum readings.
4. Compare the readings with the specified checking data.
Replace the turbocharger if the clearance does not meet the specifications.
Radial clearance:
1. Place a lever type dial gauge as shown.
Designed to read tolerances at least as small as 0.025 mm (0.0001 in).
2. Set the dial gauge to zero.
3. Push and pull the compressor wheel towards the housing and make note of the minimum and maximum readings.
Do not rotate the turbocharger shaft.
4. Compare the readings with the specified checking data.
Replace the turbocharger if the