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Lubrication & Maint./2000 Hour/24 Month
DPSG,RG34710,112 –19–07JAN02–1/5
Testing Thermostats Opening Temperature
TS281 –UN–23AUG88
High Pressure Fluids
RG8115A –UN–15JAN98
Thermostat Cover-to-Water Pump Tube
A—Cover-To-Coolant Pump Tube
To Remove Thermostat(s)
NOTE: On some engines, the coolant manifold/thermostat
housing is an integral part of the cylinder head.
CAUTION: Explosive release of fluids from
pressurized cooling system can cause serious
burns. DO NOT drain coolant until it has cooled
below operating temperature. Always loosen
radiator pressure cap or drain valve slowly to
relieve pressure.
1. Visually inspect area around thermostat housing for
leaks.
2. Remove radiator pressure cap and partially drain
cooling system.
3. Remove thermostat cover-to-water pump tube (A) and
seal.
DPSG,RG34710,112 –19–07JAN02–2/5
RG7921A –UN–13NOV97
Thermostat Cover
B—Thermostat Cover
4. Remove thermostat cover (B) with gasket.
5. Remove thermostat(s)
6. Remove and discard all gasket material. Clean gasket
surfaces.
7. Clean and check cover for cracks or damage.
40-7
110306
PN=100
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