Measure the compressor impeller radial clearance.
NOTE: Hold the impeller toward the housing. Install a wire feeler gauge or a flat feeler gauge with a maximum width of 1/4-inch at the minimum clearance point between the impeller and the housing.
Measure the turbine wheel radial clearance.
NOTE: Hold the turbine wheel toward the housing. Install a wire feeler gauge at the minimum clearance point between the wheel and the housing.
NOTE: If the compressor impeller or the turbine wheel to housing radial clearance does not meet the specifications
listed, the turbocharger must be rebuilt. Refer to the Component Shop Manuals, Bulletin Nos. 3810230 or 3810241, for Holset turbochargers.
