2008-2010 Dodge Avenger Service & Repair Manual
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2008 ENGINE
2.4L (GPEC) - Service Information - Avenger & Sebring
DESCRIPTION
2.4L ENGINE
The 2.4 Liter (148 cu. in.) in-line four cylinder engine is a double over head camshaft design with mechanical
lash tappets and four valves per cylinder design. This engine is NOT free-wheeling; meaning that the pistons
will contact the valves in the event of a timing chain failure.
The cylinders are numbered from front of the engine to the rear. The firing order is 1-3-4-2.
Fig. 1: Locating Engine Serial Number
Courtesy of CHRYSLER LLC
The engine serial number (1) is located on the rear of the cylinder block behind the oil pan. The serial number is
visible with the oil pan in place. The serial number contains engine build date information.
DIAGNOSIS AND TESTING
CYLINDER COMBUSTION PRESSURE LEAKAGE TEST
The combustion pressure leakage test provides an accurate means for determining engine condition.
Combustion pressure leakage testing will detect:
Exhaust and intake valve leaks (improper seating).
NOTE: Vehicle is equipped with at Global Powertrain Engine Controller (GPEC).
2008 Dodge Avenger SE
2008 ENGINE 2.4L (GPEC) - Service Information - Avenger & Sebring
2008 Dodge Avenger SE
2008 ENGINE 2.4L (GPEC) - Service Information - Avenger & Sebring
Leaks between adjacent cylinders or into water jacket.
Any causes for combustion/compression pressure loss.
1. Check the coolant level and fill as required. DO NOT install the pressure cap.
2. Start and operate the engine until it attains normal operating temperature, then turn the engine OFF.
3. Clean spark plug recesses with compressed air.
4. Remove the spark plugs.
5. Remove the oil filler cap.
6. Remove the air cleaner.
7. Calibrate the tester according to the manufacturer's instructions. The shop air source for testing should
maintain 483 kPa (70 psi) minimum, 1,379 kPa (200 psi) maximum, with 552 kPa (80 psi) recommended.
8. Perform the test procedures on each cylinder according to the tester manufacturer's instructions. While
testing, listen for pressurized air escaping through the throttle body, tailpipe and oil filler cap opening.
Check for bubbles in the coolant.
9. All gauge pressure indications should be equal, with no more than 25% leakage per cylinder.
10. FOR EXAMPLE: At 552 kPa (80 psi) input pressure, a minimum of 414 kPa (60 psi) should be
maintained in the cylinder.
CYLINDER COMPRESSION PRESSURE TEST
The results of a cylinder compression pressure test can be utilized to diagnose several engine malfunctions.
Ensure the battery is completely charged and the engine starter motor is in good operating condition. Otherwise
the indicated compression pressures may not be valid for diagnosis purposes.
1. Check engine oil level and add oil if necessary.
2. Drive the vehicle until engine reaches normal operating temperature. Select a route free from traffic and
other forms of congestion, observe all traffic laws, and accelerate through the gears several times briskly.
3. Remove engine cover.
4. Disconnect coil electrical connectors and remove coils.
5. Remove all spark plugs from engine. As spark plugs are being removed, check electrodes for abnormal
firing indicators fouled, hot, oily, etc. Record cylinder number of spark plug for future reference.
6. Disconnect injector electrical connectors.
7. Be sure throttle blade is fully open during the compression check.
8. Insert compression gauge Adapter 8116 or the equivalent, into the #1 spark plug hole in cylinder head.
Connect the 0-500 psi (Blue) pressure transducer CH7059 with cable Adapters to the DRBIII®. For
Special Tool identification, see SPECIAL TOOLS .
9. Crank engine until maximum pressure is reached on gauge. Record this pressure as #1 cylinder pressure.
WARNING: Do not remove the pressure cap with the system hot and under pressure
because serious burns from coolant can occur.
2008 Dodge Avenger SE
2008 ENGINE 2.4L (GPEC) - Service Information - Avenger & Sebring
10. Repeat the previous step for all remaining cylinders.
11. Compression should not be less than 1034 kPa (150 psi) and not vary more than 25 percent from cylinder
to cylinder.
12. If one or more cylinders have abnormally low compression pressures, repeat the compression test.
13. If the same cylinder or cylinders repeat an abnormally low reading on the second compression test, it
could indicate the existence of a problem in the cylinder in question. The recommended compression
pressures are to be used only as a guide to diagnosing engine problems. An engine should not be
disassembled to determine the cause of low compression unless some malfunction is present.
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 DIAGNOSIS - MECHANICAL and the ENGINE DIAGNOSIS - PERFORMANCE
diagnostic charts for possible causes and corrections of malfunctions.
For fuel system diagnosis, see FUEL SYSTEM article.
Additional tests and diagnostic procedures may be necessary for specific engine malfunctions that cannot be
isolated with the Service Diagnosis charts. Information concerning additional tests and diagnosis is provided
within the following:
Cylinder Compression Pressure Test. Refer to CYLINDER COMPRESSION PRESSURE TEST .
Cylinder Combustion Pressure Leakage Test. Refer to CYLINDER COMBUSTION PRESSURE
LEAKAGE TEST .
Engine Cylinder Head Gasket Failure Diagnosis. Refer to CYLINDER HEAD GASKET .
Intake Manifold Leakage Diagnosis. Refer to INTAKE MANIFOLD LEAKS .
Mechanical Valve Tappet Noise Diagnosis. Refer to HYDRAULIC LASH ADJUSTER NOISE
DIAGNOSIS .
Engine Oil Leak Inspection. Refer to ENGINE OIL LEAK INSPECTION .
ENGINE DIAGNOSIS - MECHANICAL
CONDITION POSSIBLE CAUSES CORRECTION
VALVETRAIN NOISE 1. High or low oil level in
crankcase.
1. Check and correct engine oil
level.
2. Thin or diluted oil. 2. Change oil to correct viscosity.
3. Thick oil 3. (a) Change engine oil and filter.
- (b) Run engine to operating
temperature.
2008 Dodge Avenger SE
2008 ENGINE 2.4L (GPEC) - Service Information - Avenger & Sebring
- (c) Change engine oil and filter
again.
4. Low oil pressure. 4. (a) Check and correct engine oil
level.
- (b) Check pressure regulating
valve.
5. Worn cam lobe. 5. Install new camshaft.
6. Worn tappet bucket. 6. Install new select fit tappet
bucket.
7. Worn valve guides. 7. Replace cylinder head.
8. Excessive runout of valve seats
on valve faces.
8. Grind valve seats and replace
valves.
CONNECTING ROD NOISE 1. Insufficient oil supply. 1. Check engine oil level.
2. Low oil pressure. 2. Check engine oil level. Inspect
oil pump relief valve and spring.
3. Thin or diluted oil. 3. Change oil to correct viscosity.
4. Thick oil 4. (a) Change engine oil and filter.
-
(b) Run engine to operating
temperature.
- (c) Change engine oil and filter
again.
5. Excessive bearing clearance. 5. Measure bearings for correct
clearance. Repair as necessary.
6. Connecting rod journal out-of-
round.
6. Replace crankshaft or grind
surface.
7. Connecting rod out-of-round. 7. Replace connecting rod.
8. Misaligned connecting rods. 8. Replace bent connecting rods.
MAIN BEARING NOISE 1. Insufficient oil supply. 1. Check engine oil level.
2. Low oil pressure. 2. Check engine oil level. Inspect
oil pump relief valve and spring.
3. Thin or diluted oil. 3. Change oil to correct viscosity.
4. Thick oil 4. (a) Change engine oil and filter.
- (b) Run engine to operating
temperature.
- (c) Change engine oil and filter
again.
5. Excessive bearing clearance. 5. Measure bearings for correct
clearance. Repair as necessary.
6. Excessive end play. 6. Check thrust bearing for wear
on flanges.
7. Crankshaft journal out-of-round
or worn.
7. Replace crankshaft or grind
journals.
8. Loose flywheel or torque
converter.
8. Tighten to correct torque.
2008 Dodge Avenger SE
2008 ENGINE 2.4L (GPEC) - Service Information - Avenger & Sebring
ENGINE DIAGNOSIS - PERFORMANCE
OIL PRESSURE DROP 1. Low oil level. 1. Check engine oil level.
2. Faulty oil pressure sending unit. 2. Install new sending unit.
3. Low oil pressure. 3. Check sending unit and main
bearing oil clearance.
4. Clogged oil filter. 4. Install new oil filter.
5. Worn parts in oil pump. 5. Replace balance shaft module.
6. Thin or diluted oil. 6. Change oil to correct viscosity.
7. Oil pump relief valve stuck. 7. Remove valve and inspect,
clean, or replace.
8. Excessive bearing clearance. 8. Measure bearings for correct
clearance.
OIL LEAKS 1. Misaligned or deteriorated
gaskets.
1. Replace gasket(s).
2. Loose fastener, broken or
porous metal part.
2. Tighten, repair or replace the
part.
3. Misaligned or deteriorated cup
or threaded plug.
3. Replace as necessary.
OIL CONSUMPTION OR
SPARK PLUGS FOULED
1. PCV system malfunction. 1. Check system and repair as
necessary. Refer to DIAGNOSIS
AND TESTING .
2. Worn, scuffed or broken rings. 2. Hone cylinder bores. Install
new rings.
3. Carbon in oil ring slots. 3. Install new rings.
4. Rings fitted too tightly in
grooves.
4. Remove rings and check
grooves. If groove is not proper
width, replace piston.
5. Worn valve guide(s). 5. Replace cylinder head.
6. Valve stem seal(s) worn or
damaged.
6. Replace seal(s).
CONDITION POSSIBLE CAUSE CORRECTION
ENGINE WILL NOT START 1. Weak battery. 1. Test battery. Charge or replace as
necessary. Refer to 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. Check for
codes. (Refer to Appropriate
Diagnostic Information)
4. Faulty coil(s) or control unit. 4. Test and replace as needed. (Refer
to Appropriate Diagnostic
Information)
2008 Dodge Avenger SE
2008 ENGINE 2.4L (GPEC) - Service Information - Avenger & Sebring
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The DODGE AVENGER 2008-2010 FACTORY Repair Service Manual is a comprehensive guide for owners and technicians who own or work on Dodge Avenger models manufactured from 2008 to 2010. This manual contains detailed instructions, diagrams, and illustrations to assist in the repair and maintenance of the Dodge Avenger, ensuring its optimal performance and longevity.
- Dodge Avenger 2008
- Dodge Avenger 2009
- Dodge Avenger 2010
With this repair service manual, users can confidently address any mechanical or electrical issues within the specified model range. From routine maintenance tasks such as oil changes and brake pad replacements to more complex repairs like engine overhauls or electrical system troubleshooting, this manual provides step-by-step instructions to guide users through each process.
The manual highlights important safety precautions and offers tips and tricks to ease the repair process. It includes detailed specifications, wiring diagrams, and troubleshooting guides to help diagnose and rectify various problems. Additionally, the manual provides information on the recommended tools and equipment necessary for each repair and maintenance procedure.
Whether you are a Dodge Avenger owner looking to save on repair costs by performing tasks yourself or a professional technician searching for accurate and reliable information, the DODGE AVENGER 2008-2010 FACTORY Repair Service Manual is an essential resource to ensure the optimal performance and longevity of your Dodge Avenger vehicle.
