Dodge Sprinter 2006 Manual page 2108

24 - 76 PLUMBING
Fig. 13 Electric Coolant Pump
1 - HEATER HOSE
2 - HOSE CLAMP (2)
3 - HEATER HOSE
4 - ELECTRIC COOLANT PUMP
5 - WIRE HARNESS CONNECTOR
6 - NUT (2)
INSTALLA TION
(1) In st a ll t h e elect r ic coola n t pu m p a n d m ou n t in g
br a cket on t o t h e body st u ds.
(2) In st a ll t h e t wo br a cket r et a in in g n u t s. Tigh t en
t h e n u t s t o 5 N·m (45 in . lbs.).
(3) Usin g a t wist in g m ot ion gen t ly in st a ll bot h
h oses on t o t h e elect r ic coola n t pu m p.
(4) Tigh t en bot h h ose cla m ps secu r ely.
(5) Con n ect t h e wir e h a r n ess con n ect or t o t h e elec-
t r ic coola n t pu m p.
(6) Recon n ect t h e n ega t ive ba t t er y ca ble.
(7) F ill t h e en gin e coolin g syst em (Refer t o 7 -
COOLING/E NGINE /COOLANT - STANDARD P RO-
CE DURE - COOLING SYSTE M F ILL).
H EAT ER CORE
DESCRIPTION
Th e h ea t er cor e is m ou n t ed in t o t h e H VAC h ou s-
in g, loca t ed beh in d t h e in st r u m en t pa n el (F ig. 14).
Th e h ea t er cor e is a h ea t exch a n ger m a de of r ows of
t u bes a n d fin s. Th e h ea t er cor e t u bes a r e a t t a ch ed t o
t h e h ea t er cor e by u sin g O-r in g sea ls a n d bolt s.
Th e h ea t er cor e is ser viced by r em ovin g a n d disa s-
sem blin g t h e H VAC h ou sin g.
Fig. 14 Front Heater Core
1 - HEATER CORE
2 - BOLT (3)
3 - HEATER CORE TUBES
4 - O-RING SEALS
OPERA TION
E n gin e coola n t is cir cu la t ed t h r ou gh t h e h ea t er
h oses t o t h e h ea t er cor e wh en ever t h e h ea t er wa t er
va lve is cycled open by t h e ATC A/C-h ea t er con t r ol.
As t h e coola n t flows t h r ou gh t h e h ea t er cor e, h ea t
r em oved fr om t h e en gin e is t r a n sfer r ed t o t h e h ea t er
cor e fin s a n d t u bes. Air dir ect ed t h r ou gh t h e h ea t er
cor e picks u p t h e h ea t fr om t h e h ea t er cor e fin s. Th e
h ea t er wa t er va lve con t r ols t h e h ea t er ou t pu t a ir
t em per a t u r e by con t r ollin g t h e a m ou n t of h ea t ed
en gin e coola n t flowin g t h r ou gh t h e h ea t er cor e. Th e
blower m ot or speed con t r ols t h e volu m e of a ir flowin g
t h r ou gh t h e H VAC h ou sin g.
Th e h ea t er cor e ca n n ot be r epa ir ed a n d, if fa u lt y or
da m a ged, it m u st be r epla ced.
REMOVAL
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, impact sensor, or instrument panel com-
ponent diagnosis or service. Disconnect and isolate
the battery negative (ground) cable, then wait two
minutes for the system capacitor to discharge
before performing further diagnosis or service. This
is the only sure way to disable the supplemental
restraint system. Failure to take the proper precau-
tions could result in accidental airbag deployment.
VA