Thermostat; Thermometer - Subaru XT 1988 Service Manual

ENGINE COOLING SYSTEM
2-5
Thermostat
1800
cc
model
The thermostat is powered to open the valve by a totally-
enclosed wax pellet which expands with increased tempera-
ture. It provides the sure open·close operation of the valve
and features high durability.
Valve 7 Rubber piston
2 Spring 8 Semifluid
3 Piston 9 Diaphragm
4 Guide 10 Wax
5 Jiggle pin 11 Temperature
6
Teflon sheet sensing case
A7·078
Fig.
2
3
2700
cc
model
The thermostat is a wax·pellet type. It is equipped with a main
valve and a sub-valve. Before the main valve opens, the sub-
valve opens to prevent abrupt pressure variations.
®
®
1 Valve
6 Stopper
2 Spring
7
Piston
®
3
Sub valve
8
Dust seal valve
4
Sub spring
9 Wax element
5 Stop ring
L2·1267
Fig. 3
Thermometer
The thermometer is installed on the intake manifold and
monitors the temperature of the coolant in the engine to
activate the temperature gauge in the combination meter.
The thermometer includes a thermistor, lead wire, spring,
terminal plate and resin body, completely sealed by a threaded
case which is integralwith a hexagon nut.
For ECM
Fig. 4
For temperature
gauge
Lead wire
Thermistor element I
Thermistor element II A7·102