LUBRICATION AND PREVENTIVE MAINTENANCE INTERVALS
Item 23 – Thermostat and
Seal
1. Thermostat
3. Cylinder Head
2. Seal
Figure 19 Typical Thermostat
Installation
Replace the thermostat and seal
every 240,000 miles (384,000 km)
on vehicle engines. On non-vehicle
engines, replace the thermostat and
seal every 4,000 hours or 24 months,
whichever comes
fi
rst.
Item 24 – Crankcase
Breather
The steel mesh breather pad in the
valve cover/intake manifold should
be removed and washed in clean
fuel oil when the valve cover is
removed for valve lash measurement
and adjustment. These intervals are
listed in Table 22.
Item 25 – Engine Tune-Up
There is no scheduled interval for
performing an engine tune-up.
However, the valve lash
must
be
measured and, if necessary, adjusted at
the regular intervals listed in Table 22.
Engine Application
Valve Lash Measurement/
Adjustment Interval
Motor Coach
Every 60,000 Miles (96,000 km)
or 24 Months*
Transit Coach
Every 45,000 Miles (72,000 km)
or 18 Months*
Stationary, Construction/Industrial,
Agricultural, or Generator Set Engines
Every 1,500 Hours or 45,000
Miles (72,000 km)*
* Whichever comes first.
Table 22 Valve Lash Measurement/Adjustment Schedule
70
All information subject to change without notice.
(Rev. May 2004)
DDC-SVC-MAN-0057 0305
Copyright © 2003 DETROIT DIESEL CORPORATION