Bearing Clearance Check

BEARING CLEARANCE CHECK
When bearing damage is suspected, verify using the following procedure.

Check for Free Rotation

NOTE: Turbine and compressor wheels must spin freely when turned by hand. No housing contact is permitted.

Press and rotate the radial shaft, then repeat from the opposite side. If either the compressor wheel or the turbine wheel contacts the housing, the bearings are bad, and a new turbocharger must be installed.

Check Axial End Play
1. Remove the exhaust back pressure valve from the turbocharger. For additional information, refer to Exhaust Gas Control Valve.
2. Position the dial indicator on the turbine end of the radial shaft and zero the indicator.

NOTE: Radial shaft movement cannot readily be measured on this turbocharger.







3. Move the radial shaft back and forth by hand and record the reading.
4. If readings exceed specifications, install a new turbocharger.