TURBOCHARGER - CONTINUED
INSPECTION - CONTINUED
Turbine housing (1)
Using straightedge, check mounting
flange area for cracks or distortion.
if cracked or distorted, discard.
Inspect turbine wheel side of turbine
housing for cracks and distortion or
wheel to housing contact.
if cracked or distorted, discard. if
scratches are deep, discard housing.
Small scratches and nicks can be
polished out with emery cloth.
Turbine casing (2)
Inspect casing for cracks or distortion.
If cracked or distorted, discard.
Inspect impeller side of casing for
cracks, scratches, nicks, or scoring.
if cracked, deeply scratched, or
scored, discard. Small scratches,
nicks, or scoring can be polished out
with emery cloth.
Bearing housing (3)
Inspect for cracks in oil passages, inlet
and outlet, and pitting or distortion on
Discard if cracked, pitted, or
Check for cracks where ribs meet bear-
ing housing and bearing housing bore.
Discard if cracked.
Using bore gage, measure inside diam-
eter of bearing housing bore. Bore
diameter should be 1.274 to 1.278
inches (32.36 to 32.46 mm).
Discard housing if bore exceeds 1.278
inches (32.38 mm).
Using 5- to 6-inch micrometer, meas-
ure turbine housing seating area diam-
eter. Diameter should be 5.049 to 5.055
inches (128.25 to 128.40 mm).
Discard if diameter does not meet
these specifications. New bearing
housing should be 5.050 to 5.052
inches (128.27 to 128.32 mm).