Cleaning; Inspection; Engine Block Heater; Description - Chrysler PT Cruiser Service & Repair Manual

7 - 48 ENGINE - 2.0/2.4L DOHC
COOLING SYSTEM PRESSURE CAP (Continued)
WARNING: IF VEHICLE HAS BEEN RUN RECENTLY,
WAIT 15 MINUTES BEFORE REMOVING CAP.
PLACE A SHOP TOWEL OVER THE CAP, AND WITH-
OUT PUSHING DOWN, ROTATE IT COUNTER-
CLOCKWISE TO THE FIRST STOP. ALLOW FLUIDS
TO ESCAPE THROUGH THE OVERFLOW TUBE.
WHEN THE SYSTEM STOPS PUSHING COOLANT
AND STEAM INTO THE CRS TANK AND PRESSURE
DROPS, PUSH DOWN ON THE CAP AND REMOVE
IT COMPLETELY. SQUEEZING
INLET HOSE WITH A SHOP TOWEL (TO CHECK
PRESSURE) BEFORE AND AFTER TURNING TO
THE FIRST STOP IS RECOMMENDED.

CLEANING

Use only a mild soap to clean the pressure cap.

INSPECTION

Hold the cap in your hand, right side up (Fig. 18).
The vent valve at the bottom of the cap should open
with a slight pull. If the rubber gasket has swollen,
preventing the valve from opening, replace the cap.
Fig. 18 Cooling System Pressure Cap - Typical
1 - FILLER NECK SEAL
2 - VACUUM VENT VALVE
3 - PRESSURE RATING
4 - PRESSURE VALVE
the rubber gasket, replace the cap. Use only a
replacement cap that has a spring to hold the
vent shut.
coolant reserve systems. This design ensures system
pressurization.

ENGINE BLOCK HEATER

THE RADIATOR

DESCRIPTION

core hole plug) in the engine block, with the heating
element immersed in coolant (Fig. 19). The engine
block heater is available as an optional accessory.
The heater is powered by ordinary house current
(110 Volt AC) through a power cord and connector
(Fig. 20).
1 - BLOCK HEATER
2 - POWER CORD

OPERATION

provide easier engine starting and faster warm-up,
when vehicle is operated in areas having extremely
low temperatures.
CAUTION: The power cord must be secured in its
retainer clips, and not positioned so it could con-
tact linkages or exhaust manifolds and become
damaged.
If any light can be seen between vent valve and
A replacement cap must be of the type designed for
The heater is mounted in a core hole (in place of a
Fig. 19 Engine Block Heater
When in operation, the engine block heater can
PT