2006 DODGE RAM SRT-10 oil pressure

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ENGINE - 8.3L - SERVICE INFORMATION
DESCRIPTION ............................. 2713
DIAGNOSIS AND TESTING
INTRODUCTION . ......................... 2714
ENGINE DIAGNOSIS - PERFORMANCE .... 2715
ENGINE DIAGNOSIS - MECHANICAL ....... 2716
CYLINDER COMPRESSION PRESSURE
TEST.................................... 2718
CYLINDER COMBUSTION PRESSURE
LEAKAGE TEST.......................... 2718
CYLINDER HEAD GASKET FAILURE
DIAGNOSIS.............................. 2719
HYDRAULIC TAPPET NOISE DIAGNOSIS . . . 2720
ENGINE OIL LEAK INSPECTION ........... 2720
STANDARD PROCEDURE
ENGINE CORE AND OIL GALLERY PLUGS . 2722
FORM-IN-PLACE GASKETS AND SEALERS . 2722
ENGINE GASKET SURFACE
PREPARATION........................... 2723
HYDROSTATIC LOCKED ENGINE .......... 2723
REMOVAL - ENGINE ASSEMBLY . . ........... 2724
INSTALLATION - ENGINE ASSEMBLY ........ 2728
SPECIFICATIONS
ENGINE ................................. 2731
TORQUE ................................. 2736
SPECIAL TOOLS
ENGINE ................................. 2738
SYSTEM-AIR INTAKE
DESCRIPTION ............................. 2741
ELEMENT-AIR CLEANER
REMOVAL ................................. 2742
INSTALLATION ............................. 2743
HOUSING-AIR CLEANER
REMOVAL ................................. 2744
INSTALLATION ............................. 2745
MOUNTS-ENGINE
REMOVAL ................................. 2746
INSTALLATION ............................. 2747
MANIFOLD-INTAKE
DIAGNOSIS AND TESTING
INTAKE MANIFOLD LEAKS ................ 2748
REMOVAL ................................. 2748
INSPECTION ............................... 2750
INSTALLATION ............................. 2751
MANIFOLD-EXHAUST
REMOVAL ................................. 2754
INSPECTION ............................... 2755
INSTALLATION ............................. 2755
HEAD(S)-CYLINDER
REMOVAL - CYLINDER HEAD(S) ............. 2757CLEANING
CLEANING AND INSPECTION............. 2758
INSTALLATION - CYLINDER HEAD(S) ........ 2758
COVER(S)-CYLINDER HEAD
REMOVAL ................................. 2760
INSTALLATION ............................. 2761
ARMS-ROCKER
REMOVAL ................................. 2762
INSTALLATION ............................. 2762
SPRINGS/SEALS-VALVE
DIAGNOSIS AND TESTING
VALVE SPRING TESTING ................. 2763
STANDARD PROCEDURE - VALVE SPRING/
SEAL SERVICE IN-CAR ................... 2763
REMOVAL ................................. 2764
INSTALLATION ............................. 2765
INTAKE/EXHAUST - VALVES/SEATS/GUIDES
STANDARD PROCEDURE - VALVE AND
VALVE SEAT - REFACING ................. 2766
INSPECTION............................... 2767
COVER-TIMING CHAIN
REMOVAL ................................. 2769
INSTALLATION ............................. 2771
TIMING CHAIN AND SPROCKETS
REMOVAL ................................. 2774
INSTALLATION ............................. 2775
LUBRICATION
DESCRIPTION ............................. 2777
OPERATION ............................... 2777
DIAGNOSIS AND TESTING
CHECKING ENGINE OIL PRESSURE ....... 2777
ENGINE OIL LEAK ........................ 2777
OIL
STANDARD PROCEDURE
CHECKING ENGINE OIL LEVEL........... 2779
ENGINE OILAND FILTER CHANGE ........ 2779
COOLER & LINES-OIL
DESCRIPTION ............................. 2781
OPERATION ............................... 2781
STANDARD PROCEDURE - OIL COOLER LINE
QUICK CONNECT FITTING DISASSEMBLY/
ASSEMBLY............................... 2781
REMOVAL ................................. 2782
INSTALLATION ............................. 2783
PAN-OIL
REMOVAL ................................. 2784
INSTALLATION ............................. 2785
PUMP-OIL
REMOVAL ................................. 2788
DISASSEMBLY . ............................ 2788
CLEANING ................................. 2789

INSPECTION ............................... 2789
ASSEMBLY . ............................... 2791
INSTALLATION ............................. 2792
SENSOR-OIL PRESSURE
REMOVAL ................................. 2793
INSTALLATION ............................. 2793
SENSOR-OIL TEMPERATURE
REMOVAL ................................. 2794
INSTALLATION ............................. 2794
BLOCK-ENGINE
DESCRIPTION ............................. 2795
STANDARD PROCEDURE - CYLINDER BORE
HONING ................................. 2795
CLEANING ................................. 2795
INSPECTION ............................... 2796
HYDRAULIC TAPPETS
DESCRIPTION ............................. 2797
REMOVAL ................................. 2797
INSTALLATION ............................. 2798
CAMSHAFT
REMOVAL ................................. 2799
INSTALLATION ............................. 2800
ROD-PISTON & CONNECTING
DESCRIPTION ............................. 2802
STANDARD PROCEDURE
PISTON FITTING ......................... 2802
MEASURING CONNECTING ROD SIDE
CLEARANCE............................. 2803
REMOVAL ................................. 2803
INSPECTION ............................... 2804
INSTALLATION ............................. 2805
RINGS-PISTON
STANDARD PROCEDURE - MEASURING
PISTON RING CLEARANCES .............. 2807REMOVAL ................................. 2807
INSTALLATION ............................. 2808
BEARINGS-CONNECTING ROD
DESCRIPTION ............................. 2810
STANDARD PROCEDURE
CONNECTING ROD BEARING - FITTING . . . 2810
MEASURING CONNECTING ROD BEARING
CLEARANCE............................. 2810
DAMPER-CRANKSHAFT
REMOVAL ................................. 2812
INSTALLATION ............................. 2813
SEAL-CRANKSHAFT OIL- FRONT
REMOVAL ................................. 2814
INSTALLATION ............................. 2814
SEAL-OIL-REAR-CRANK AND RETAINER
REMOVAL ................................. 2815
INSTALLATION ............................. 2815
BEARINGS-CRANKSHAFT MAIN
DESCRIPTION ............................. 2817
STANDARD PROCEDURE
MEASURING CRANKSHAFT MAIN BEARING
CLEARANCE IN-CAR...................... 2817
CRANKSHAFT
STANDARD PROCEDURE
MEASURING CRANKSHAFT END PLAY .... 2819
CRANKSHAFT JOURNAL MEASUREMENT . 2819
REMOVAL ................................. 2820
INSPECTION............................... 2822
INSTALLATION ............................. 2822
BEARING-CRANKSHAFT PILOT
REMOVAL ................................. 2825
INSTALLATION ............................. 2825

Engine Serial Number
This number (2) is located on the lower right front of
the cylinder block near the oil pressure sensor.
DIAGNOSIS AND TESTING
INTRODUCTION
Engine diagnosis is helpful in determining the causes of malfunctions notdetected and remedied by routine main-
tenance.
These malfunctions may be classified as either mechanical (e.g., a strange noise), or performance (e.g., engine
idles rough and stalls).
(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) - MECHANICAL and (Refer to 9 - ENGINE - DIAGNOSIS AND
TESTING) - PERFORMANCE for possible causes and corrections of malfunctions. Refer to the appropriate Diag-
nostic Information for fuel system diagnosis.
Additional tests and diagnostic procedures may be necessary for specificengine malfunctions that cannot be iso-
lated with the Engine Diagnosis charts. Information concerning additional tests and diagnosis is provided within the
following:
Cylinder Compression Pressure Test
Cylinder Combustion Pressure Leakage Test
Cylinder Head Gasket Failure Diagnosis
Intake Manifold Leakage Diagnosis
Hydraulic Tappet Noise Diagnosis
Engine Oil Leak Inspection

ENGINE DIAGNOSIS - PERFORMANCE
CONDITION POSSIBLE CAUSES CORRECTION
ENGINE WILL NOT
CRANK1. Weak or discharged battery. 1. Charge or replace battery as necessary.
(Refer to 8 - ELECTRICAL/BATTERY
SYSTEM - DIAGNOSIS AND TESTING).
Check charging system. Refer to the
appropriate Diagnostic Information for
charging system diagnosis.
2. Corroded or loose battery
connections.2. Clean/tighten battery/starter connections.
3. Faulty starter or related circuits. 3. Check starting system. (Refer to8-
ELECTRICAL/STARTING - DIAGNOSIS
AND TESTING).
4. Seized accessory drive
component.4. Remove accessory drive belt and
attempt to start engine. If engine cranks,
repair/replace seized component.
5. Engine internal mechanical failure
or hydrostatic lock.5. (Refer to 9 - ENGINE - STANDARD
PROCEDURE - HYDROSTATIC LOCKED
ENGINE).
ENGINE CRANKS BUT
WILL NOT START1. No spark. 1. Check for spark. Refer to the appropriate
Diagnostic Information for ignition system
diagnosis.
2. No fuel. 2. Perform fuel pressure test. Refer to the
appropriate Diagnostic Information for fuel
system diagnosis.
3. Low or no engine compression. 3. Perform cylinder compression test.
(Refer to 9 - ENGINE - DIAGNOSIS AND
TESTING - CYLINDER COMPRESSION
PRESSURE TEST).
ENGINE LOSS OF
POWER1. Worn or incorrect gapped spark
plugs.1. Replace spark plugs or set gap.
2. Dirt or water in fuel system. 2. Clean system and replace fuel filter.
3. Faulty fuel pump. 3. Replace fuel pump.
4. Incorrect valve timing. 4. Correct valve timing.
5. Blown cylinder head gasket(s). 5. Replace cylinder head gasket(s).
6. Low compression. 6. Test cylinder compression. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING -
CYLINDER COMPRESSION PRESSURE
TEST)
7. Burned, warped, or pitted valves. 7. Install new or reface valves as
necessary.
8. Plugged or restricted exhaust. 8. Replace parts as necessary.
9. Faulty ignition cables. 9. Replace ignition cables as necessary.
10. Faulty coil(s). 10. Test and replace as necessary.

CONDITION POSSIBLE CAUSES CORRECTION
ENGINE STALLS OR
ROUGH IDLE1. Carbon buildup on throttle plate. 1. Remove throttle body and de-carbon.
2. Engine idle speed too low. 2. Check Idle Air Control circuit. Refer to
the appropriate Diagnostic Information for
IAC motor testing.
3. Worn or incorrectly gapped spark
plugs.3. Replace spark plugs or set gap.
4. Faulty or crossed ignition cables. 4. Check for correct firing order or replace
ignition cables as necessary.
5. Faulty coil(s). 5. Test and replace as necessary.
6. Intake manifold vacuum leak. 6. Inspect intake manifold gasket and
vacuum hoses. Replace as necessary.
ENGINE MISSES ON
ACCELERATION1. Worn or incorrectly gapped spark
plugs.1. Replace spark plugs or set gap.
2. Faulty ignition cables. 2. Replace ignition cables as necessary.
3. Dirt or water in fuel system. 3. Clean system and replace fuel filter.
4. Burned, warped, or pitted valves. 4. Install new or reface valves as
necessary.
5. Faulty coil(s). 5. Test and replace as necessary.
ENGINE DIAGNOSIS - MECHANICAL
CONDITION POSSIBLE CAUSES CORRECTION
NOISY VALVES 1. High or low oil level incrankcase. 1. Check for correct oil level. Adjust oil level
by draining or adding as needed.
2. Thin or diluted oil. 2. Change oil and filter.
3. Low oil pressure. 3. Check engine oil level. If OK, perform oil
pressure test. (Refer to 9 - ENGINE/
LUBRICATION - DIAGNOSIS AND
TESTING).
4. Dirt in tappets/lash adjusters. 4. Clean/replace hydraulic tappets/lash
adjusters.
5. Bent push rod(s). 5. Replace push rod(s) as necessary.
6. Worn rocker arms. 6. Replace worn rocker arms and inspect
oil supply to rocker arms.
7. Worn tappets/lash adjusters. 7. Replace hydraulic tappets/hydrauliclash
adjusters.
8. Worn valve guides. 8. Ream and install new valves with
oversize stems.
9. Excessive runout of valve seats
on valve faces.9. Grind valve seats and valves.

CONDITION POSSIBLE CAUSES CORRECTION
CONNECTING ROD
NOISE1. Insufficient oil supply. 1. Check engine oil level.
2. Low oil pressure. 2. Check engine oil level. If OK, perform oil
pressure test. Inspect oil pump relief valve
and spring. (Refer to 9 - ENGINE/
LUBRICATION - DIAGNOSIS AND
TESTING).
3. Thin or diluted oil. 3. Change oil and filter.
4. Excessive bearing clearance. 4. Measure bearings for correct clearance.
Repair as necessary.
5. Connecting rod journal out-of-
round.5. Replace crankshaft or grind journals.
6. Misaligned connecting rods. 6. 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. If OK, perform oil
pressure test. Inspect oil pump relief valve
and spring. (Refer to 9 - ENGINE/
LUBRICATION - DIAGNOSIS AND
TESTING).
3. Thin or diluted oil. 3. Change oil and filter.
4. Excessive bearing clearance. 4. Measure bearings for correct clearance.
Repair as necessary.
5. Excessive end play. 5. Check No. 3 bearing for wear on flanges.
6. Crankshaft journal out-of-round
and/or worn.6. Grind journals or replace crankshaft.
7. Loose flywheel. 7. Inspect crankshaft, flywheel, and bolts for
damage. Tighten bolts to correct torque.
OIL PRESSURE DROP 1. Low oil level. 1. Check oil level and fill if necessary.
2. Faulty oil pressure sending unit. 2. Replace sending unit.
3. Clogged oil filter. 3. Install new oil filter.
4. Worn oil pump. 4. Replace worn gears or oil pump
assembly.
5. Thin or diluted oil. 5. Change oil to correct viscosity.
6. Excessive bearing clearance. 6. Measure bearings for correct clearance.
7. Oil pump relief valve stuck. 7. Remove relief valve. Inspect valve and
spring. Replace as necessary.
8. Oil pump pick up tube restricted,
cracked, or damaged.8. Remove oil pan and inspect oil pump
pick up tube. Clean or replace as
necessary.
9. Oil pump cover loose, warped, or
cracked.9. Inspect/tighten cover screws or install
new oil pump, if necessary.
OIL LEAKS 1. Misaligned or deteriorated
gaskets.1. Replace gaskets.
2. Loose fastener, broken or porous
component.2. Tighten, repair or replace component.

CONDITION POSSIBLE CAUSES CORRECTION
EXCESSIVE OIL
CONSUMPTION OR
SPARK PLUGS OIL
FOULED1. PCV system malfunction. 1. Check and repair PCV system as
necessary.
2. Defective valve stem seal(s). 2. Repair or replace seal(s).
3. Worn or broken piston rings. 3. Hone cylinder bores. Install new rings.
4. Scuffed pistons/cylinder walls. 4. Hone cylinder bores and replace pistons
as necessary.
5. Carbon in oil control ring groove. 5. Remove rings and de-carbon piston.
6. Worn valve guides. 6. Ream and install new valves with
oversize stems.
7. Piston rings fitted too tightly in
grooves.7. Remove piston rings. Check ring end
gap and side clearance. Replace as
necessary.
CYLINDER COMPRESSION PRESSURE TEST
The results of a cylinder compressionpressure test can be utilized to diagnose several engine malfunctions.
Ensurethebatteryiscompletelychargedandtheenginestartermotorisingood 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 thegears several times briskly.
3. Remove the Auto Shut Down (ASD) relay from the Power Distribution Center(PDC).
4. Disconnect ignition cables from spark plugs.
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. Be sure throttle blade is fully open during the compression check.
7. Insert compression gauge adaptor Special Tool 8116 or the equivalent, into the No. 1 spark plug hole in cylinder
head. Connect the 0-500 psi (Blue) pressure transducer (Special Tool CH7059) with cable adaptors to the scan
tool. For Special Tool identification, (Refer to 9 - ENGINE - SPECIAL TOOLS).
8. Crank engine until maximum pressure is reached on gauge. Record this pressure as No. 1 cylinder pressure.
9. Repeat the previous step for all remaining cylinders.
10. Compression should not be less than 689 kPa (100 psi) and not vary more than 25 percent from cylinder to
cylinder.
11. If one or more cylinders have abnormally low compression pressures, repeat the compression test.
12. 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.
CYLINDER COMBUSTIONPRESSURE 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).
Leaks between adjacent cylinders or into water jacket.
Any causes for combustion/compression pressure loss.
WARNING: Do not remove the cooling system pressure cap with the system hot and under pressure
because serious burns from coolant can occur.
1. Check the coolant level and fill as required. DO NOT install the pressurecap.
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 fill 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 pressure bottle.
All gauge pressure indications should be equal, with no more than 25 percent leakage per cylinder.
FOR EXAMPLE:At 552 kPa (80 psi) input pressure, a minimum of 414 kPa (60 psi) should be maintained in the
cylinder.
CYLINDER HEAD GASKET FAILURE DIAGNOSIS
A cylinder head gasket leak can be located between adjacent cylinders, between a cylinder and the adjacent water
jacket, or an external coolant leak may be present.
Possible indications of the cylinder head gasket leaking between adjacent cylinders are:
Loss of engine power
Engine misfiring
Poor fuel economy
Possible indications of the cylinder head gasket leaking between a cylinder and an adjacent water jacket are:
Engine overheating
Loss of coolant
Excessive steam (white smoke) emitting from exhaust
Coolant foaming
CYLINDER-TO-CYLINDER LEAKAGE TEST
To determine if an engine cylinder head gasket is leaking between adjacentcylinders, follow the procedures in Cyl-
inder Compression Pressure Test in this section. An engine cylinder head gasket leaking between adjacent cylinders
will result in approximately a 50-70% reduction in compression pressure.Cylinders adjacent to each other will both
have low compression.
CYLINDER-TO-WATER JACKET LEAKAGE TEST
WARNING: Use extreme caution when the engine is operating with coolant pressure cap removed.
VISUAL TEST METHOD
With the engine cool, remove the coolant pressure cap. Start the engine andallow it to warm up until thermostat
opens.
If a large combustion/compression pressure leak exists, bubbles will be visible in the coolant.
COOLING SYSTEM TESTER METHOD
WARNING: With cooling system tester in place, pressure will build up fast.Excessive pressure built up, by
continuous engine operation, must be released to a safe pressure point. Never permit pressure to exceed
138 kpa (20 psi).
Install Cooling System Tester 7700 or equivalent to pressure cap neck. Start the engine and observe the tester’s
pressure gauge. If gauge pulsates with every power stroke of a cylinder a combustion pressure leak is evident.