2006 DODGE RAM SRT-10 oil pressure

SWITCH-OIL PRESSURE
DESCRIPTION
The 3 wire, solid-state engine oil pressure sensor (sending unit) is located in an engine oil pressure gallery.
OPERATION
The oil pressure sensor uses three circuits. They are:
A 5 volt power supply from the Powertrain Control Module (PCM)
A sensor ground through the PCM’s sensor return
A signal to the PCM relating to engine oil pressure
The oil pressure sensor has a 3 wire electrical function very much like the Manifold Absolute Pressure (MAP) sen-
sor. Meaning different pressures relate to different output voltages.
A 5 volt supply is sent to the sensor from the PCM to power up the sensor. The sensor returns a voltage signal
back to the PCM relating to engine oil pressure. This signal is then transferred (bussed) to the instrument panel on
either a CCD or PCI bus circuit (depending on vehicle line) to operate the oil pressure gauge and the check gauges
lamp. Ground for the sensor is provided by the PCM through a low-noise sensor return.
REMOVAL
1. Disconnect the negative cable from the battery.
2. Raise vehicle on hoist.
3. Remove front splash shield.
4. Disconnect oil pressure sender wire (4).
5. Remove the pressure sender (2).
INSTALLATION
1. Install oil pressure sender.
2. Connect oil pressure sender wire.
3. Install front splash shield.
4. Lower vehicle.
5. Connect the negative battery cable.

PUMP-ENGINE OIL
REMOVAL
1. Remove the oil pan and pick-up tube (Refer to 9 - ENGINE/LUBRICATION/OILPA N - R E M O VA L ) .
2. Remove the timing chain cover (Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) -
REMOVAL).
3. Remove the timing chains and tensioners (Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT/CHAIN AND
SPROCKETS - REMOVAL).
4. Remove the four bolts, primary timing chain tensioner and the oil pump.
DISASSEMBLY
1. Remove oil pump cover screws and lift off cover plate.
2. Remove pump inner and outer rotors.
NOTE: Once the oil pressure relief valve, cup plug, and pin are removed, thepump assembly must be
replaced.
3. If it is necessary to remove the pressure relief valve, drive the roll pinfrom pump housing and remove cup plug,
spring and valve.
INSPECTION
CAUTION: Oil pump pressure relief valve and
spring should not be removed from the oil pump.
If these components are disassembled and or
removed from the pump the entire oil pump
assembly must be replaced.
1. Clean all parts thoroughly. Mating surface of the oil
pump housing should be smooth. If the pump cover
is scratched or grooved the oil pump assembly
should be replaced.
2. Lay a straight edge across the pump cover surface
(3). If a 0.025 mm (0.001 in.) feeler gauge (2) can
be inserted between the cover and the straight
edge the oil pump assembly should be replaced.
3. Measure the thickness of the outer rotor. If the
outer rotor thickness measures at 12.005 mm
(0.472 in.) or less the oil pump assembly must be
replaced.
4. Measure the diameter of the outer rotor. If the outer
rotor diameter measures at 85.925 mm (3.382 in.)
or less the oil pump assembly must be replaced.

8. Place a straight edge (1) across the body of the oil
pump (between the bolt holes), if a feeler gauge (2)
of .095 mm (0.0038 in.) or greater can be inserted
between the straightedge and the rotors, the pump
must be replaced.
NOTE: The 3.7L/4.7L Oil pump is released as an
assembly. There are no DaimlerChrysler part num-
bers for Sub-Assembly components. In the event
the oil pump is not functioning or out of specifica-
tion it must be replaced as an assembly.
ASSEMBLY
1. Wash all parts in a suitable solvent and inspect carefully for damage or wear.
2. Install inner and outer rotors
3. Install oil pump cover plate and install cover bolts and tighten them to 12Nꞏm(105in.lbs.).
4. Prime oil pump before installation by filling rotor cavity with engine oil.
5. If oil pressure is low and pump is within specifications, inspect for worn engine bearings or other causes for oil
pressure loss.
INSTALLATION
1. Position the oil pump onto the crankshaft and
install one oil pump retaining bolt.
2. Position the primary timing chain tensioner and
install three retaining bolts.
3. Tighten the oil pump and primary timing chain ten-
sioner retaining bolts to 28 Nꞏm (250 in. lbs.) in the
sequence shown.
4. Install the secondary timing chain tensioners and
timing chains (Refer to 9 - ENGINE/VALVE TIM-
ING/TIMING BELT/CHAIN AND SPROCKETS -
INSTALLATION).
5. Install the timing chain cover (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT / CHAIN COVER(S)
- INSTALLATION).
6. Install the pick-up tube and oil pan (Refer to 9 -
ENGINE/LUBRICATION/OIL PAN -
INSTALLATION).

OIL
STANDARD PROCEDURE - ENGINE OIL SERVICE
The engine oil level indicator (1) is located at the right
rear of the engine on the 3.7L/4.7L engines.
CRANKCASE OIL LEVEL INSPECTION
CAUTION: Do not overfill crankcase with engine oil, pressure loss or oil foaming can result.
Inspect engine oil level approximately every 800 kilometers (500 miles).Unless the engine has exhibited loss of oil
pressure, run the engine for about five minutes before checking oil level.Checking engine oil level on a cold engine
is not accurate.
To ensure proper lubrication of an engine, the engine oil must be maintained at an acceptable level. The acceptable
levels are indicated between the ADD and SAFE marks on the engine oil dipstick.
1. Position vehicle on level surface.
2. With engine OFF, allow approximately ten minutes for oil to settle to bottom of crankcase, remove engine oil
dipstick.
3. Wipe dipstick clean.
4. Install dipstick and verify it is seated in the tube.
5. Remove dipstick, with handle held above the tip, take oil level reading.
6. Add oil only if level is below the ADD mark on dipstick.
ENGINE OIL CHANGE
Change engine oil at mileage and time intervals described in Maintenance Schedules.
Run engine until achieving normal operating temperature.
1. Position the vehicle on a level surface and turn engine off.
2. Hoist and support vehicle on safety stands.
3. Remove oil fill cap.
4. Place a suitable drain pan under crankcase drain.
5. Remove drain plug from crankcase and allow oil to drain into pan. Inspectdrain plug threads for stretching or
other damage. Replace drain plug if damaged.
6. Install drain plug in crankcase.
7. Lower vehicle and fill crankcase with specified type and amount of engine oil described in this section.
8. Install oil fill cap.
9. Start engine and inspect for leaks.

5. Disconnect vapor purge hose, brake booster hose, speed control servo hose, positive crankcase ventilation
(PCV) hose.
6. Disconnect generator electrical connections.
7. Disconnect air conditioning compressor electrical connections.
8. Disconnect left and right radio suppressor straps.
9. Disconnect and remove ignition coil towers.
10. Remove top oil dipstick tube retaining bolt and ground strap.
11. Bleed fuel system (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD PROCEDURE).
12. Remove fuel rail.
13. Remove throttle body assembly and mounting bracket.
14. Drain cooling system below coolant temperature level (Refer to 7 - COOLING - STANDARD PROCEDURE).
15. Remove the heater hoses from the engine front cover and the heater core.
16. Unclip and remove heater hoses and tubes from intake manifold.
17. Remove coolant temperature sensor (Refer to 7 - COOLING/ENGINE/ENGINE COOLANT TEMP SENSOR -
REMOVAL).
18. Remove intake manifold retaining fasteners in reverse order of tightening sequence.
19. Remove intake manifold.
INSTALLATION
1. Install intake manifold gaskets.
2. Install intake manifold.
3. Install intake manifold retaining bolts and tighten in
sequence shown in to 12 Nꞏm (105 in. lbs.).
4. Install left and right radio suppressor straps.
5. Install throttle body assembly.
6. Connect throttle cable and speed control cable to
throttle body.
7. Install fuel rail.
8. Install ignition coil towers.
9. Position and install heater hoses and tubes onto intake manifold.
10. Install the heater hoses to the heater core and engine front cover.
11. Connect electrical connectors for the following components:
Manifold Absolute Pressure (MAP) Sensor
Intake Air Temperature (IAT) Sensor
Throttle Position (TPS) Sensor
Coolant Temperature (CTS) Sensor
Idle Air Control (IAC) Motor
Ignition coil towers
Fuel injectors

page page
ENGINE - 4.7L - SERVICE INFORMATION
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - PERFORMANCE............. 2316
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - MECHANICAL............... 2318
DIAGNOSIS AND TESTING - CYLINDER
COMPRESSION PRESSURE............... 2318
DIAGNOSIS AND TESTING - CYLINDER
COMBUSTION PRESSURE LEAKAGE...... 2319
DIAGNOSIS AND TESTING - ENGINE
DIAGNOSIS - INTRODUCTION............. 2320
STANDARD PROCEDURE
STANDARD PROCEDURE - REPAIR
DAMAGED OR WORN THREADS.......... 2320
STANDARD PROCEDURE - FORM-IN-
PLACE GASKETS AND SEALERS.......... 2320
REMOVAL ................................. 2321
INSTALLATION ............................. 2327
SPECIFICATIONS
SPECIFICATIONS - 4.7L ENGINE .......... 2331
TORQUE ................................. 2336
SPECIAL TOOLS
4.7L ENGINE ............................. 2338
ELEMENT - AIR CLEANER
REMOVAL ................................. 2342
INSTALLATION ............................. 2343
CYLINDER HEAD
DESCRIPTION
DESCRIPTION - CYLINDER HEAD ......... 2344
DESCRIPTION - VALVE GUIDES ........... 2344
DIAGNOSIS AND TESTING
CYLINDER HEAD GASKET................ 2344
REMOVAL
REMOVAL - LEFT CYLINDER HEAD ........ 2345
REMOVAL - RIGHT CYLINDER HEAD ...... 2348
CLEANING ................................. 2350
INSPECTION ............................... 2350
INSTALLATION
INSTALLATION - LEFT CYLINDER HEAD . . . 2351
INSTALLATION - RIGHT CYLINDER HEAD . . 2353
CAMSHAFT - LEFT
DESCRIPTION ............................. 2357
REMOVAL ................................. 2357
INSTALLATION ............................. 2359
CAMSHAFT - RIGHT
DESCRIPTION ............................. 2362
REMOVAL ................................. 2362
INSTALLATION ............................. 2365
COVER - CYLINDER HEAD
DESCRIPTION ............................. 2369REMOVAL
REMOVAL - RIGHT SIDE .................. 2369
REMOVAL - LEFT SIDE ................... 2369
CLEANING ................................. 2369
INSTALLATION
INSTALLATION - RIGHT SIDE .............. 2370
INSTALLATION - LEFT SIDE ............... 2370
VALVES & SEATS - INTAKE/EXHAUST
DESCRIPTION ............................. 2371
REMOVAL ................................. 2371
INSTALLATION ............................. 2372
ROCKER ARM - VALVE
DESCRIPTION ............................. 2374
DIAGNOSIS AND TESTING - HYDRAULIC
LASH ADJUSTER ......................... 2374
REMOVAL ................................. 2374
INSTALLATION ............................. 2375
SPRINGS-VALVE
DESCRIPTION ............................. 2376
REMOVAL ................................. 2376
INSTALLATION ............................. 2377
SEALS-VALVE GUIDE
DESCRIPTION ............................. 2378
ENGINE BLOCK
DESCRIPTION ............................. 2379
STANDARD PROCEDURE - CYLINDER BORE
HONING ................................. 2379
CLEANING ................................. 2379
INSPECTION............................... 2380
BEARINGS - CONNECTING ROD
STANDARD PROCEDURE - CONNECTING
ROD BEARING FITTING ................... 2381
PLUGS - CORE
REMOVAL ................................. 2384
INSTALLATION ............................. 2384
CRANKSHAFT
DESCRIPTION ............................. 2385
REMOVAL ................................. 2385
INSPECTION............................... 2386
INSTALLATION ............................. 2386
BEARINGS - CRANKSHAFT MAIN
STANDARD PROCEDURE - CRANKSHAFT
MAIN BEARING - FITTING ................. 2389
INSPECTION............................... 2390
SEAL - CRANKSHAFT OIL - FRONT
REMOVAL ................................. 2391
INSTALLATION ............................. 2392
SEAL - CRANKSHAFT OIL - REAR
DIAGNOSIS AND TESTING - REAR SEAL
AREA LEAKS . ............................ 2393
REMOVAL ................................. 2393

INSTALLATION ............................. 2394
FLEX PLATE
REMOVAL ................................. 2395
INSTALLATION ............................. 2395
ROD - PISTON & CONNECTING
DESCRIPTION ............................. 2396
STANDARD PROCEDURE - PISTON FITTING . 2396
REMOVAL ................................. 2397
CLEANING ................................. 2397
INSPECTION ............................... 2398
INSTALLATION ............................. 2398
RINGS - PISTON
STANDARD PROCEDURE - PISTON RING
FITTING .................................. 2400
DAMPER - CRANKSHAFT
REMOVAL ................................. 2403
INSTALLATION ............................. 2404
COVER - STRUCTURAL
DESCRIPTION ............................. 2405
OPERATION ............................... 2405
REMOVAL ................................. 2405
INSTALLATION ............................. 2405
MOUNT - FRONT
REMOVAL ................................. 2406
INSTALLATION ............................. 2408
MOUNT - REAR
REMOVAL ................................. 2410
INSTALLATION ............................. 2410
LUBRICATION
DESCRIPTION .............................. 2411
OPERATION ................................ 2411
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - CHECKING
ENGINE OIL PRESSURE.................. 2412
DIAGNOSIS AND TESTING - ENGINE OIL
LEAK.................................... 2413
OIL
STANDARD PROCEDURE - ENGINE OIL
SERVICE ................................. 2414
FILTER - ENGINE OIL
REMOVAL ................................. 2416
INSTALLATION ............................. 2416
PAN - ENGINE OIL
REMOVAL ................................. 2417
INSTALLATION ............................. 2417
SWITCH - OIL PRESSURE
DESCRIPTION
DESCRIPTION ........................... 2418DESCRIPTION ........................... 2418
OPERATION
OPERATION ............................. 2418
OPERATION ............................. 2418
REMOVAL ................................. 2419
INSTALLATION ............................. 2419
PUMP - ENGINE OIL
REMOVAL ................................. 2420
DISASSEMBLY . ............................ 2420
CLEANING ................................. 2420
INSPECTION............................... 2420
ASSEMBLY................................ 2422
INSTALLATION ............................. 2422
MANIFOLD - INTAKE
DESCRIPTION ............................. 2423
DIAGNOSIS AND TESTING - INTAKE
MANIFOLD LEAKAGE ..................... 2423
REMOVAL ................................. 2423
CLEANING ................................. 2424
INSPECTION............................... 2424
INSTALLATION ............................. 2425
MANIFOLD - EXHAUST
DESCRIPTION ............................. 2426
REMOVAL ................................. 2426
CLEANING ................................. 2428
INSPECTION............................... 2428
INSTALLATION ............................. 2428
VALVE TIMING
DESCRIPTION - TIMING DRIVE SYSTEM ..... 2430
OPERATION - TIMING DRIVE SYSTEM....... 2430
STANDARD PROCEDURE
STANDARD PROCEDURE - MEASURING
TIMING CHAIN WEAR..................... 2431
STANDARD PROCEDURE - ENGINE TIMING
- VERIFICATION.......................... 2431
COVER - TIMING
REMOVAL ................................. 2436
INSTALLATION ............................. 2437
TIMING CHAIN & SPROCKETS
REMOVAL ................................. 2438
INSPECTION............................... 2441
INSTALLATION ............................. 2442
SHAFT - IDLER
REMOVAL ................................. 2446
INSTALLATION ............................. 2446

DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - MECHANICAL
CONDITION POSSIBLE CAUSES CORRECTIONS
NOISY VALVES 1. High or low oil level in
crankcase.1. (Refer to LUBRICATION &
MAINTENANCE -
SPECIFICATIONS)
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. (Refer to 9 - ENGINE/CYLINDER
HEAD/INTAKE/EXHAUST VALVES
& SEATS - STANDARD
PROCEDURE)
8. Excessive runout of valve seats
on valve faces.8. (Refer to 9 - ENGINE/CYLINDER
HEAD/INTAKE/EXHAUST VALVES
& SEATS - STANDARD
PROCEDURE)
CONNECTING ROD NOISE 1. Insufficient oil supply. 1. (Refer to LUBRICATION&
MAINTENANCE -
SPECIFICATIONS)
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 LUBRICATION &
MAINTENANCE -
SPECIFICATIONS)
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
DIAGNOSIS AND TESTING - CYLINDER COMPRESSION PRESSURE
The results of a cylinder compressionpressure test can be utilized to diagnose several engine malfunctions.