Chrysler RAM TRUCK 2500 1994 Service Manual page 310

• COOLING SYSTEM 7 - 55
(1) Position drive belt over all pulleys
e x c e p t
ten­
sioner pulley.
(2) Attach a socket/wrench to pulley mounting bolt
of automatic tensioner (Fig. 8).
(3) Rotate socket/wrench counterclockwise. Install
belt over tensioner pulley. Let tensioner rotate back
into place. Remove wrench. Be sure belt is properly
seated on all pulleys.
5 . 9 L DIESEL
ENGINE
REMOVAL
Drive belts on diesel engines are equipped with a
spring loaded automatic belt tensioner (Fig. 9). fig­
ure 9 displays the tensioner for vehicles with­
out air conditioning.
This belt tensioner will be used on all belt configu­
rations, such as with or without air conditioning. For
more information, refer to Automatic Belt Tensioner,
proceeding i n this group.
Fig. 9 Belt Tensioner—5.9L Diesel—Typical (non-A/C
shown)
(1) A 3/8 inch square hole is provided i n the auto­
matic belt tensioner (Fig. 9). Attach a 3/8 inch drive-
long handle ratchet to this hole.
(2) Rotate ratchet and tensioner assembly counter­
clockwise (as viewed from front) until tension has
been relieved from belt.
(3) Remove belt from water pump pulley first.
(4) Remove belt from vehicle.
INSTALLATION
CAUTION: When installing serpentine a c c e s s o r y
drive belt, belt must be routed correctly. If not, en­
gine may overheat due to water pump rotating in
wrong direction. Refer to (Figs. 5 or 6) for correct
engine belt routing. The correct belt with correct
length must be used.
(1) Position drive belt over all pulleys except wa­
ter pump pulley.
(2) Attach a 3/8 inch ratchet to tensioner.
(3) Rotate ratchet and belt tensioner counterclock­
wise. Place belt over water pump pulley. Let ten­
sioner rotate back into place. Remove ratchet. Be
sure belt is properly seated on all pulleys.
AUTOMATIC BELT TENSIONER
Drive belts on all engines are equipped with a
spring loaded automatic belt tensioner (Figs. 10, 11
or 12). This belt tensioner will be used with all belt
configurations, such as with or without power steer­
ing or air conditioning.
Caution: Do not attempt to check belt tension with
a belt tension gauge on vehicles equipped with an
automatic belt tensioner.
Fig. 10 Belt Tensioner—3.9L V-6 or 5.2/5.9L V-8
LDC-Gas Engines
On 3.9L V-6 or 5.2/5.9L V-8 LDC-gas engines, the
tensioner is equipped with an indexing arrow (Fig.
13) on back of tensioner and an indexing mark on
tensioner housing. I f a new belt is being installed, ar­
row must be within approximately 3 mm (1/8 in.) of
indexing mark (Point B-Fig. 13). Belt is considered
new i f i t has been used 15 minutes or less. I f this
specification cannot be met, check for:
• The wrong belt being installed (incorrect length/
width)
• Worn bearings on an engine accessory (A/C com­
pressor, power steering pump, water pump, idler pul­
ley or generator)
• A pulley on an engine accessory being loose
• Misalignment of an engine accessory