Cleaning; Inspection; Radiator Fan Description; Operation - Chrysler Dodge Caravan 2002 Manual

RS
RADIATOR PRESSURE CAP (Continued)

CLEANING

Use only a mild soap to clean the pressure cap.

INSPECTION

Hold the cap in your hand, top side up (Fig. 20).
The vent valve at the bottom of the cap should open.
If the rubber gasket has swollen, preventing the
valve from opening, replace the cap.
Hold the cleaned cap in your hand, upside down.
If any light can be seen between vent valve and the
rubber gasket, replace the cap. Do not use a
replacement cap that has a spring to hold the
vent shut.
A replacement cap must be of the type designed for
coolant reserve systems. This design ensures coolant
return to the radiator.
RADIATOR FAN
DESCRIPTION
The dual radiator fans are mounted to the back
side of the radiator (Fig. 21). The radiator fan consist
of the fan blade, electric motor and a support shroud
which are all serviced as an assembly.

OPERATION

COOLANT TEMPERATURE
Fan
Operation Initial
Speeds:
Fan On: 104°C
(220°F)
Fan Off: 101°C
(214°F)
RADIATOR FAN OPERATION CHART
A/C PRESSURE
Max Initial
110°C 1,724 Kpa
(230°F) Fan (250 psi)
Speed
Duty-Cycles
(Ramps-up)
from 30% to
99%
Fan Speed 1,710 Kpa
Duty-Cycles (248 psi)
(Ramps-
down) from
99% to 30%
Fig. 20 Cooling System Pressure Cap
1 - OVERFLOW NIPPLE
2 - MAIN SPRING
3 - GASKET RETAINER
4 - STAINLESS-STEEL SWIVEL TOP
5 - RUBBER SEALS
6 - VENT VALVE
7 - RADIATOR
8 - FILLER NECK
Max
2,068 Kpa 96°C (204°F)
(300 psi) Fan
Speed
Duty-Cycles
(Ramps-up)
from 30% to
99%
Fan Speed 89°C (192°F)
Duty-Cycles
(Ramps-
down) from
99% to 30%
ENGINE 7 - 29
TRANSAXLE OIL
TEMPERATURE
Initial Max
111°C (232°F)
Fan Speed
Duty Cycles
(Ramps-up)
from 30% to
99%
Fan Speed
Duty Cycles
(Ramps-down)
from 99% to
30%