Idle Operating Temperature Troubleshooting (Below Range) - BRP E250DHLSCS Service Manual

Typical temperatures observed at IDLE speed
with pyrometer should be 143°F ± 15°F (62°C ±
8°C)
If you get low or inaccurate read-
IMPORTANT:
ings during these tests, coat the probe location of
the digital pyrometer with a liberal amount of Ther-
mal Joint Compound, P/N 322170.
Idle Operating Temperature
Troubleshooting (Below Range)
If engine IDLE temperature is below operating
range 160°F ± 10°F (71°C ± 6°C), check thermo-
stat and pressure relief valve operation.
Pressure Relief Valve
The pressure relief valve should be closed at
IDLE speed. Water should not flow past the
plunger and seal.
Seal
Pressure Relief Valve
If IDLE temperature increases to specific operat-
ing range, pressure relief valve and thermostats
are functioning properly.
If IDLE temperature is below specific operating
range, pinch off the water outlet hoses from pres-
sure relief valve to cylinder heads.
1. Outlet hoses
2. Pliers
Use hose pinching pliers (acquired through local
tool source) to prevent hose damage.
Plunger
DRC8113
Hose Pinching Pliers
ENGINE TEMPERATURE CHECK
1
2
COOLING SYSTEM
2
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