Checking Camshaft Lobes And Journals; Installation; Coolant Heater (If Equipped); Camshaft Bushings - Navistar INTERNATIONAL DT 466 Service Manual

Checking Camshaft Lobes and Journals

Figure 376 Checking camshaft lobes and
journals for wear
1. Use an outside micrometer to measure across
each camshaft lobe from A-D and B-C. Subtract
measurement B-C from measurement A-D. This
is the cam lobe lift.
If any measurement exceeds the specification,
replace the camshaft.
2. Use an outside micrometer to measure the
diameter of each camshaft journal.
If any measurement exceeds the specification
(Table 38), replace the camshaft.

Installation

Coolant Heater (if equipped)

1. If servicing a leaky coolant heater, replace O-ring
on heater assembly.
2. Place nonpetroleum base lubricant around O-ring
area and install into crankcase. Orient electrical
connector so that it is facing downward (6 o'clock
position).
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
CRANKCASE, CRANKSHAFT, AND CAMSHAFT
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
3. Tighten the 5/32 in hex socket head cap screw to
the special torque value (Table 39).
4. Replenish coolant level if only servicing coolant
heater.

Camshaft Bushings

1. Identify each camshaft bushing according to its
outside diameter.
Table 36
Bushing
Location
Front
Rear
Intermediate
2. Lubricate each new camshaft bushing and
crankcase bushing bore with clean engine oil.
Figure 377 Camshaft bushing installation tool
3. Install new camshaft bearing onto the expanding
collet. Tighten collet by turning adjusting nut until
the bushing is held securely in place.
EGES-265-2
Outside Width
Diameter (nominal)
(nominal)
65.5 mm (2.50 in) 25.4 mm
(1.00 in)
65.5 mm (2.50 in) 17.8 mm
(0.70 in)
63.0 mm (2.48 in) 17.8 mm
(0.70 in)
263