Dodge Dakota (R1). Manual — part 278
(2) Partially drain cooling system (Refer to 7 -
COOLING/ENGINE - STANDARD PROCEDURE).
Do not waste reusable coolant. If solution is clean,
drain coolant into a clean container for reuse.
(3) Remove upper radiator hose clamp (Fig. 42)
and hose at radiator.
(4) Unplug wiring harness from A/C compressor.
(5) Remove air cleaner assembly.
(6) Remove accessory drive belt as follows: The
drive belt is equipped with a spring loaded automatic
tensioner (Fig. 45). Relax tension from belt by rotat-
ing tensioner clockwise (as viewed from front) (Fig.
45). When all belt tension has been relaxed, remove
accessory drive belt.
(7) The drive belt idler pulley must be removed to
gain access to one of A/C compressor/generator
bracket mounting bolts. Remove idler pulley bolt and
remove idler pulley (Fig. 44).
(8) Remove oil dipstick tube mounting bolt at side
of A/C-generator mounting bracket.
(9) Disconnect throttle body control cables (Refer
to 14 - FUEL SYSTEM/FUEL INJECTION/ACCEL-
ERATOR PEDAL - REMOVAL).
(10) Remove heater hose clamp and heater hose
from heater hose coolant return tube.
(11) Remove
heater
hose
coolant
return
tube
mounting bolt (Fig. 46) and remove tube from engine.
Discard the old tube O-ring.
(12) Remove
bracket-to-intake
manifold
bolts
(number 1 and 2 - (Fig. 44).
(13) Remove six bracket bolts (number 3 - (Fig. 44).
(14) Lift and position generator and A/C compres-
sor (along with their common mounting bracket) to
gain access to bypass hose. A block of wood may be
used to hold assembly in position.
(15) Loosen and position both hose clamps to cen-
ter of bypass hose. Remove hose from vehicle.
INSTALLATION
WITHOUT AIR CONDITIONING
(1) Position bypass hose clamps (Fig. 42) to center
of hose.
(2) Install bypass hose to engine.
(3) Secure both hose clamps (Fig. 42).
(4) Fill cooling system.
(5) Start and warm the engine. Check for leaks.
WITH AIR CONDITIONING
(1) Position bypass hose clamps to center of hose.
(2) Install bypass hose to engine.
(3) Secure both hose clamps (Fig. 42).
(4) Install generator-A/C mounting bracket assem-
bly to engine. Tighten bolts (number 1 and 2— (Fig.
44) to 54 N·m (40 ft. lbs.) torque. Tighten bolts (num-
ber 3— (Fig. 44) to 40 N·m (30 ft. lbs.) torque.
Fig. 45 Automatic Belt Tensioner Assembly
1 - IDLER PULLEY
2 - TENSIONER
3 - FAN BLADE
Fig. 46 Coolant Return Tube - 5.2L/5.9L Engines -
Typical
1 - COOLANT RETURN TUBE
2 - WATER PUMP
3 - TUBE MOUNTING BOLT
4 - O-RING
7a - 58
5.2L ENGINE
R1
WATER PUMP BYPASS HOSE (Continued)
(5) Install a new O-ring to the heater hose coolant
return tube (Fig. 46). Coat the new O-ring with anti-
freeze before installation.
(6) Install coolant return tube and its mounting
bolt to engine (Fig. 46).
(7) Connect throttle body control cables.
(8) Install oil dipstick mounting bolt.
(9) Install idler pulley. Tighten bolt to 54 N·m (40
ft. lbs.) torque.
(10) Relax tension from belt tensioner (Fig. 45).
Install drive belt.
CAUTION: When installing serpentine accessory
drive belt, the belt must be routed correctly. If not,
engine may overheat due to water pump rotating in
wrong direction. Refer to (Fig. 47) for correct belt
routing. The correct belt with correct length must
be used.
(11) Install air cleaner assembly.
(12) Install upper radiator hose to radiator.
(13) Connect wiring harness to A/C compressor.
(14) Connect battery negative cable.
(15) Fill cooling system (Refer to 7 - COOLING/
ENGINE - STANDARD PROCEDURE).
(16) Start and warm the engine. Check for leaks.
COOLANT RESERVE/
OVERFLOW/SYSTEM
DESCRIPTION
The coolant reserve/overflow tank is integral to the
upper fan shroud assembly (Fig. 48) and is made of
high temperature plastic (Refer to 7 - COOLING/EN-
GINE/RADIATOR - REMOVAL).
OPERATION
The coolant reserve/overflow system works in con-
junction with the radiator pressure cap. It utilizes
thermal expansion and contraction of coolant to keep
coolant free of trapped air. It provides a volume for
expansion and contraction of coolant. It also provides
a convenient and safe method for checking coolant
level and adjusting level at atmospheric pressure.
This is done without removing the radiator pressure
cap. The system also provides some reserve coolant
to the radiator to cover minor leaks and evaporation
or boiling losses.
As the engine cools, a vacuum is formed in the
cooling system of both the radiator and engine. Cool-
ant will then be drawn from the coolant tank and
returned to a proper level in the radiator.
Fig. 47 Belt Routing - 5.2L/5.9L Engines
1 - IDLER PULLEY
2 - GENERATOR PULLEY
3 - A/C COMPRESSOR PULLEY
4 - IF W/OUT A/C
5 - POWER STEERING PUMP PULLEY
6 - WATER PUMP PULLEY
7 - CRANKSHAFT PULLEY
8 - AUTOMATIC TENSIONER
Fig. 48 Upper Fan Shroud with Integral Coolant
Reserve/Overflow System
1 - RADIATOR
2 - WASHER FLUID RESERVOIR
3 - COOLANT OVERFLOW/RESERVOIR
4 - FAN SHROUD (UPPER)
5 - SCREW
6 - INTERLOCKING PINS
7 - FAN SHROUD (LOWER)
R1
5.2L ENGINE
7a - 59
WATER PUMP BYPASS HOSE (Continued)
ACCESSORY DRIVE BELT
TABLE OF CONTENTS
page
page
AUTOMATIC BELT TENSIONER - 2.5L VM
DIESEL
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
DRIVE BELTS - 2.5L VM DIESEL
ACCESSORY DRIVE BELT . . . . . . . . . . . . . . . . 61
AUTOMATIC BELT TENSIONERS - 5.2L ENGINE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
DRIVE BELTS - 5.2L ENGINE
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . . 64
ACCESSORY DRIVE BELT - 5.2L . . . . . . . . . . . 64
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 67
AUTOMATIC BELT TENSIONER
- 2.5L VM DIESEL
DESCRIPTION
Drive belt tension is controlled by a spring loaded
automatic belt tensioner located below and to the
front of the engine oil filter (Fig. 1).
WARNING: BECAUSE OF HIGH SPRING PRES-
SURE, DO NOT ATTEMPT TO DISASSEMBLE THE
AUTOMATIC BELT TENSIONER. UNIT IS SERVICED
AS AN ASSEMBLY.
DESCRIPTION - BELT TENSION
Correct accessory drive belt tension is required to
be sure of optimum performance of belt driven engine
accessories. If specified tension is not maintained,
belt slippage may cause; engine overheating, lack of
power steering assist, loss of air conditioning capac-
ity,
reduced
generator
output
rate
and
greatly
reduced belt life.
An automatic belt tensioner is used to maintain
correct belt tension at all times. Do not attempt to
check belt tension with a belt tension gauge on vehi-
cles equipped with an automatic belt tensioner.
Fig. 1 Automatic Belt Tensioner Assembly
1 - FAN PULLEY
2 - IDLER PULLEY
3 - IDLER PULLEY
4 - GENERATOR
5 - POWER STEERING PUMP
6 - DRIVE BELT
7 - CRANKSHAFT PULLEY
8 - AUTOMATIC BELT TENSIONER
7a - 60
ACCESSORY DRIVE BELT
R1
DRIVE BELTS - 2.5L VM
DIESEL
DESCRIPTION
The accessory drive components are operated by a
single, crankshaft driven, serpentine drive belt. An
automatic belt tensioner is used to maintain correct
belt tension at all times.
CAUTION: When installing a serpentine accessory
drive belt, the belt MUST be routed correctly. If not,
the engine may overheat due to water pump rotat-
ing in wrong direction.
DIAGNOSIS AND TESTING - ACCESSORY
DRIVE BELT
When diagnosing serpentine accessory drive belts,
small cracks that run across the ribbed surface of the
belt from rib to rib (Fig. 2), are considered normal.
These are not a reason to replace the belt. However,
cracks running along a rib (not across) are not nor-
mal. Any belt with cracks running along a rib must
be replaced (Fig. 2). Also replace the belt if it has
excessive wear, frayed cords or severe glazing.
Refer to the Serpentine Drive Belt Diagnosis chart
for further belt diagnosis.
SERPENTINE BELT DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
Rib Chuncking (One or
More Ribs Has Separated
From Belt Body)
1. Foreign objects imbedded in
pulley grooves.
1. Remove foreign objects from
pulley grooves. Replace belt.
2. Installation damage.
2. Replace belt.
Rib Or Belt Wear
1. Pulley(s) misaligned.
1. Align pulley(s).
2. Abrasive enviroment.
2. Clean pulley(s). Replace belt
if necessary.
3. Rusted pulley(s).
3. Clean rust from pulley(s).
4. Sharp or jagged pulley groove
tips.
4. Replace pulley.
5. Rubber deteriorated.
5. Replace belt.
Logitudinal Belt Cracking
(Cracks Between Two Ribs)
1. Belt has mistracked from pulley
groove.
1. Replace belt.
2. Pulley groove tip has worn away
rubber to tensile member.
2. Replace belt.
Belt Slips
1. Belt slips because of insufficient
tension.
1. Replace automatic belt
tensioner.
2. Incorrect belt.
2. Replace belt.
Fig. 2 Serpentine Belt Wear Patterns
1 - NORMAL CRACKS BELT OK
2 - NOT NORMAL CRACKS REPLACE BELT
R1
ACCESSORY DRIVE BELT
7a - 61
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст