Installation
Caution: When installing a new seal, the flat side of the
seal must be toward the mandrel for correct installation.
Use thermostat seal mandrel, Part No. ST-1225, and a
lead hammer to install the seal.
A counterbore in the housing bore locates the seal.
Thermostat (1-32)
Testing - In Chassis
The engine thermostat and the thermostat seal must
operate correctly for the engine to operate in the most
efficient temperature range. Overheating or overcooling
will shorten engine life.
Warning: Complete this test with the engine coolant
temperature below 50°C [120°F]. Hot steam can cause
serious personal injury.
Remove the upper radiator hose from the thermostat
housing.
Install a hose of the same size on the thermostat housing
outlet long enough to reach a remote dry container used
to collect coolant.
Install and tighten a hose clamp on the housing outlet.
Torque Value: 5 N•m [40 in-lb]
Install the end of the hose in a dry container.
Operate the engine at rated RPM for one (1) minute.
Shut the engine off, and measure the amount of coolant
collected in the container.
The amount of coolant collected must not be more than
100cc [3.3 fluid ounces].
Section 1 - Cooling System Thermostat (1-32)
N14 Page 1-69
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