Dodge Neon / Neon SRT-4. Manual — part 227
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VALVE STEM SEALS
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INTAKE/EXHAUST VALVES & SEATS
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STANDARD PROCEDURE - VALVE AND
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ENGINE BLOCK
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CRANKSHAFT
STANDARD PROCEDURE - CRANKSHAFT
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CRANKSHAFT OIL SEAL - FRONT
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CRANKSHAFT OIL SEAL - REAR
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PISTON & CONNECTING ROD
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STANDARD PROCEDURE - CYLINDER BORE
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CONNECTING ROD BEARINGS
PISTON RINGS
STANDARD PROCEDURE - PISTON RING -
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STRUCTURAL COLLAR
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FLEX PLATE
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VIBRATION DAMPER
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ENGINE MOUNTING
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LEFT MOUNT
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ENGINE MOUNT BRACKET
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RIGHT MOUNT
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TORQUE STRUT
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ENGINE TORQUE STRUT ADJUSTMENT
LUBRICATION
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DIAGNOSIS AND TESTING - CHECKING
ENGINE OIL PRESSURE . . . . . . . . . . . . . . . . 68
OIL
OIL FILTER
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OIL PAN
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OIL PRESSURE SENSOR/SWITCH
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OIL PUMP
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OIL FILTER ADAPTER
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INTAKE MANIFOLD
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EXHAUST MANIFOLD
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9 - 2
ENGINE 2.0L SOHC
PL/SRT-4
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VALVE TIMING
STANDARD PROCEDURE - VALVE TIMING
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TIMING BELT COVER(S)
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TIMING BELT AND SPROCKETS
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TIMING BELT TENSIONER ASSEMBLY
ENGINE 2.0L SOHC
DESCRIPTION
The 2.0 Liter (122 cu. in.) in-line four cylinder
engine is a single over head camshaft with hydraulic
lash adjusters and four valves per cylinder design
(Fig. 1). The engine does not have provisions for a
free wheeling valve train.
The cylinders are numbered from front of the
engine to the rear. The firing order is 1–3–4–2.
The engine identification number is located on the
left side of the engine block at the bedplate/engine
block parting line near the crankshaft position sensor
(Fig. 2).
DIAGNOSIS AND TESTING
ENGINE DIAGNOSIS - INTRODUCTION
Engine diagnosis is helpful in determining the
causes of malfunctions not detected and remedied by
routine maintenance.
These malfunctions may be classified as either
mechanical (e.g., a strange noise), or performance
(e.g., engine idles rough and stalls).
Refer to the Engine Mechanical and the Engine
Performance diagnostic charts, for possible causes
and corrections of malfunctions (Refer to 9 - ENGINE
- DIAGNOSIS AND TESTING - MECHANICAL)
(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING
- PERFORMANCE).
For fuel system diagnosis, (Refer to 14 - FUEL
SYSTEM/FUEL DELIVERY
-
DIAGNOSIS AND
TESTING).
Additional tests and diagnostic procedures may be
necessary for specific engine malfunctions that can-
not be isolated with the Service Diagnosis charts.
Information concerning additional tests and diagno-
sis is provided within the following:
• Cylinder Compression Pressure Test
• Cylinder Combustion Pressure Leakage Test
• Engine Cylinder Head Gasket Failure Diagnosis
• Intake Manifold Leakage Diagnosis
• Hydraulic Lash Adjuster Noise Diagnosis
• Engine Oil Leak Inspection
PL/SRT-4
ENGINE 2.0L SOHC
9 - 3
Fig. 1 2.0L SOHC Engine
Fig. 2 Engine Identification
1 - ENGINE IDENTIFICATION LOCATION
2 - CRANKSHAFT POSITION SENSOR
9 - 4
ENGINE 2.0L SOHC
PL/SRT-4
ENGINE 2.0L SOHC (Continued)
ENGINE DIAGNOSIS - PERFORMANCE
CONDITION
POSSIBLE CAUSE
CORRECTION
ENGINE WILL NOT START
1. Weak battery.
1. Test battery. Charge or replace
as necessary. (Refer to 8 -
ELECTRICAL/BATTERY SYSTEM -
DIAGNOSIS AND TESTING)
2. Corroded or loose battery
connections.
2. Clean and tighten battery
connections. Apply a coat of light
mineral grease to terminals.
3. Faulty starter.
3. Test starting system. (Refer to 8 -
ELECTRICAL/STARTING -
DIAGNOSIS AND TESTING)
4. Faulty coil(s) or control unit.
4. Test and replace as needed.
(Refer to Appropriate Diagnostic
Information)
5. Incorrect spark plug gap.
5. Set gap. (Refer to 8 -
ELECTRICAL/IGNITION CONTROL
- SPECIFICATIONS)
6. Contamination in fuel system.
6. Clean system and replace fuel
filter.
7. Faulty fuel pump.
7. Test fuel pump and replace as
needed. (Refer to Appropriate
Diagnostic Information)
8. Incorrect engine timing.
8. Check for a skipped timing
belt/chain.
ENGINE STALLS OR IDLES
ROUGH
1. Idle speed too low.
1. Test minimum air flow. (Refer to
Appropriate Diagnostic Information)
2. Incorrect fuel mixture.
2. (Refer to Appropriate Diagnostic
Information)
3. Intake manifold leakage.
3. Inspect intake manifold, manifold
gasket, and vacuum hoses.
4. Faulty ignition coil(s).
4. Test and replace as necessary.
(Refer to Appropriate Diagnostic
Information)
PL/SRT-4
ENGINE 2.0L SOHC
9 - 5
ENGINE 2.0L SOHC (Continued)
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