2012 Dodge Journey Service & Repair Manual

2012 ENGINE 3.6L - Service Information - Journey DESCRIPTION DESCRIPTION Fig. 1: 3.6L (219.7 CID) Flexible Fuel V - 6 Engine Courtesy of CHRYSLER GROUP, LLC The 3.6 liter (219.7 CID) flexible fuel V-6 engine features Variable Valve Timing (VVT), Dual Overhead Camshafts (DOHC) and a high-pressure die-cast aluminum cylinder block with steel liners in a 60° configuration. The 3.6 liter engine has a chain driven variable discharge oil pump with a two-stage pressure regulator for improved fuel economy. The exhaust manifolds are integrated into the cylinder heads for reduced weight. The cylinders are numbered from front to rear. The right bank is numbered 1, 3, 5 and the left bank is numbered 2, 4, 6. The firing order is 1-2-3-4-5-6. The engine serial number is located on the left side of the cylinder block at the transmission flange. DIAGNOSIS AND TESTING ENGINE DIAGNOSIS - INTRODUCTION NOTE: RWD engine configuration shown in illustration, FWD similar. 2012 Dodge Journey R/T 2012 ENGINE 3.6L - Service Information - Journey 2012 Dodge Journey R/T 2012 ENGINE 3.6L - Service Information - Journey

Engine diagnosis is helpful in determining the causes of malfunctions not detected and remedied by routine maintenance. These malfunctions may be classified as either performance (e.g., engine idles rough and stalls) or mechanical (e.g., a strange noise). Refer to ENGINE PERFORMANCE DIAGNOSTIC TABLE and ENGINE MECHANICAL DIAGNOSTIC TABLE for possible causes and corrections of malfunctions. Refer to FUEL SYSTEM article, for the fuel system diagnosis. 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 diagnosis is provided within the following diagnosis:  Cylinder Compression Pressure Test. Refer to CYLINDER COMPRESSION PRESSURE LEAKAGE .  Cylinder Combustion Pressure Leakage Test. Refer to CYLINDER COMBUSTION PRESSURE LEAKAGE .  Engine Cylinder Head Gasket Failure Diagnosis. Refer to CYLINDER HEAD GASKET .  Intake Manifold Leakage Diagnosis. Refer to DIAGNOSIS AND TESTING - INTAKE MANIFOLD LEAKS . ENGINE PERFORMANCE DIAGNOSTIC TABLE CONDITION POSSIBLE CAUSE CORRECTION ENGINE WILL NOT START 1. Weak battery 1. Charge or replace as necessary. Refer to BATTERY, DIAGNOSIS AND TESTING . 2. Corroded or loose battery connections. 2. Clean and tighten battery connections. Refer to CLEANING . 3. Faulty engine starting system. 3. Diagnose engine starting system. Refer to DIAGNOSIS AND TESTING . 4. Faulty coil or control unit. 4. Replace ignition coil. Refer to COIL, IGNITION, REMOVAL . 5. Incorrect spark plug gap. 5. Correct as necessary. 6. Incorrect cam timing. 6. Verify cam timing. Refer to Engine/Valve Timing - Standard Procedure . 7. Dirt or water in fuel system. 7. Clean fuel system. 8. Faulty fuel pump or wiring. 8. Repair or replace as necessary. 9. Faulty Camshaft Position (CMP) sensor. 9. Replace sensor. Refer to SENSOR, CAMSHAFT POSITION, REMOVAL . 10. Faulty Crankshaft 10. Replace sensor. Refer to SENSOR, 2012 Dodge Journey R/T 2012 ENGINE 3.6L - Service Information - Journey

ENGINE MECHANICAL DIAGNOSTIC TABLE Position (CKP) sensor. CRANKSHAFT POSITION, REMOVAL . ENGINE STALLS OR ROUGH IDLE 1. Vacuum leak. 1. Inspect intake manifold and vacuum hoses, repair or replace as necessary. 2. Faulty Crankshaft Position (CKP) sensor. 2. Replace sensor. Refer to SENSOR, CRANKSHAFT POSITION, REMOVAL . 3. Faulty ignition coil. 3. Replace ignition coil. Refer to COIL, IGNITION, REMOVAL . 4. Incorrect cam timing. 4. Verify cam timing. Refer to Engine/Valve Timing - Standard Procedure . ENGINE LOSS OF POWER 1. Dirty or incorrectly gapped spark plugs. 1. Correct as necessary. Refer to SPARK PLUG, REMOVAL . 2. Dirt or water in fuel system. 2. Clean fuel system. 3. Faulty fuel pump. 3. Replace fuel pump. Refer to MODULE, FUEL PUMP, REMOVAL . 4. Leaking cylinder head gasket. 4. Replace cylinder head gasket. Refer to CYLINDER HEAD, REMOVAL . 5. Low compression. 5. Determine the cause and repair as necessary. Refer to CYLINDER COMBUSTION PRESSURE LEAKAGE . 6. Burned, warped or pitted valves. 6. Replace as necessary. Refer to VALVES, INTAKE AND EXHAUST, REMOVAL . 7. Plugged or restricted exhaust system. 7. Inspect and replace as necessary. 8. Faulty ignition coil. 8. Replace ignition coil. Refer to COIL, IGNITION, REMOVAL . 9. Incorrect cam timing. 9. Verify cam timing. Refer to Engine/Valve Timing - Standard Procedure . ENGINE MISSES ON ACCELERATION 1. Dirty or incorrectly gapped spark plugs. 1. Correct as necessary. Refer to SPARK PLUG, REMOVAL . 2. Dirt in fuel system. 2. Clean fuel system. 3. Burned, warped or pitted valves. 3. Replace as necessary. Refer to VALVES, INTAKE AND EXHAUST, REMOVAL . 4. Faulty ignition coil. 4. Replace ignition coil. Refer to COIL, IGNITION, REMOVAL . ENGINE MISSES AT HIGH SPEED 1. Dirty or incorrectly gapped spark plugs. 1. Correct as necessary. Refer to SPARK PLUG, REMOVAL . 4. Faulty ignition coil. 2. Replace ignition coil. Refer to COIL, IGNITION, REMOVAL . 3. Dirt or water in fuel system. 3. Clean fuel system. 2012 Dodge Journey R/T 2012 ENGINE 3.6L - Service Information - Journey

CYLINDER COMPRESSION PRESSURE LEAKAGE CONDITION POSSIBLE CAUSES CORRECTIONS NOISY VALVES 1. High or low oil level in crankcase. 1. Refer to Engine/Lubrication/OIL - Standard Procedure . 2. Thin or diluted oil. 2. Change oil and filter. 3. Low oil pressure. 3. Check oil pump, if Ok, check rod and main bearings for excessive wear. 4. Dirt in lash adjusters. 4. Replace as necessary. 5. Worn rocker arms. 5. Replace as necessary. 6. Worn lash adjusters 6. Replace as necessary. 7. Worn valve guides. 7. Inspect the valve guides for wear, cracks or looseness. If either condition exists, replace the cylinder head. Refer to CYLINDER HEAD, REMOVAL . 8. Excessive runout of valve seats on valve faces. 8. Refer to VALVES, INTAKE AND EXHAUST, STANDARD PROCEDURE . CONNECTING ROD NOISE 1. Insufficient oil supply. 1. Refer to Engine/Lubrication/OIL - Standard Procedure . 2. Low oil pressure. 2. Check oil pump, if OK, check rod and main bearings for excessive wear. 3. Thin or diluted oil. 3. Change oil and filter. 4. Excessive bearing clearance. 4. Replace as necessary. 5. Connecting rod journal out- of-round. 5. Service or replace crankshaft. 6. Misaligned connecting rods. 6. Replace bent connecting rods. MAIN BEARING NOISE 1. Insufficient oil supply. 1. Refer to Engine/Lubrication/OIL - Standard Procedure . 2. Low oil pressure. 2. Check oil pump, if OK, check rod and main bearings for excessive wear. 3. Thin or diluted oil. 3. Change oil and filter. 4. Excessive bearing clearance. 4. Replace as necessary. 5. Excessive end play. 5. Check thrust washers for wear. 6. Crankshaft journal out-of round. 6. Service or replace crankshaft. 7. Loose flywheel or torque converter. 7. Tighten to correct torque NOTE: The results of a cylinder compression pressure test can be utilized to diagnose several engine malfunctions. NOTE: Ensure the battery is completely charged and the engine starter motor is in good operating condition. Otherwise the indicated compression pressures may 2012 Dodge Journey R/T 2012 ENGINE 3.6L - Service Information - Journey

1. Clean the spark plug recesses with compressed air. 2. Remove the spark plugs and record the cylinder number of each spark plug for future reference. 3. Inspect the spark plug electrodes for abnormal firing indicators such as fouled, hot, oily, etc. 4. Disable the fuel system and perform the fuel system pressure release procedure. Refer to FUEL SYSTEM PRESSURE RELEASE PROCEDURE . 5. Insert a compression pressure gauge and rotate the engine with the engine starter motor for three revolutions. 6. Record the compression pressure on the 3rd revolution. Continue the test for the remaining cylinders. 7. Compression should not be less than 689 kPa (100 psi) and not vary more than 25 percent from cylinder to cylinder. 8. If one or more cylinders have abnormally low compression pressures, repeat the compression test. 9. If one or more cylinders continue to have abnormally low compression pressures, perform the cylinder combustion pressure leakage test. Refer to CYLINDER COMBUSTION PRESSURE LEAKAGE . CYLINDER COMBUSTION PRESSURE LEAKAGE 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).  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 radiator cap. 2. Start and operate the engine until it attains normal operating temperature, then turn the engine OFF. 3. Remove the spark plugs. 4. Remove the oil filler cap. 5. Remove the air cleaner hose. 6. Calibrate the tester according to the manufacturer's instructions. The shop air source for testing should not be valid for diagnosis purposes. NOTE: 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. NOTE: 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. 2012 Dodge Journey R/T 2012 ENGINE 3.6L - Service Information - Journey

2012 Dodge Journey Service & Repair Manual

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