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PERFORMANCE DIAGNOSIS CHART

CONDITION POSSIBLE CAUSE CORRECTION

ENGINE WILL NOT START 1. Weak battery 1. Charge or replace asnecessary.

2. Corroded or loose batteryconnections.

2. Clean and tighten batteryconnections. Apply a coat oflight mineral grease to theterminals.

3. Faulty starter. 3. Refer to DIAGNOSIS ANDTESTING .

4. Faulty coil or control unit. 4. Refer to REMOVAL .

5. Incorrect spark plug gap. 1. Correct as necessary.

6. Dirt or water in fuel system. 6. Clean system and replace fuelfilter.

7. Faulty fuel pump, relay orwiring.

7. Repair or replace as necessary.

ENGINE STALLS OR ROUGHIDLE

1. Dirty or incorrectly gappedspark plugs.

1. Correct as necessary.

2. Idle mixture too lean or toorich.

2. Refer to appropriateELECTRICAL DIAGNOSTICSarticle .

3. Vacuum leak. 3. Inspect intake manifold andvacuum hoses, repair or replaceas necessary.

4. Faulty coil. 4. Refer to REMOVAL .

5. Incorrect engine timing. 5. Refer to VALVE TIMING .ENGINE LOSS OF POWER 1. Dirty or incorrectly gapped

spark plugs.1. Correct as necessary.

2. Dirt or water in fuel system. 2. Clean system and replace fuelfilter.

3. Faulty fuel pump. 3. Refer to the AppropriateELECTRICAL DIAGNOSTICSarticle

4. Blown cylinder head gasket. 4. Replace cylinder head gasket.

5. Low compression. 5. Refer to DIAGNOSIS ANDTESTING .

6. Burned, warped or pittedvalves.

6. Replace as necessary.

7. Plugged or restricted exhaustsystem.

7. Inspect and replace asnecessary.

8. Faulty coil. 8. Refer to REMOVAL .

ENGINE MISSES ONACCELERATION

1. Spark plugs dirty orincorrectly gapped.

1. Correct as necessary.

2. Dirt in fuel system. 2. Clean fuel system.

3. Burned, warped or pittedvalves.

3. Replace as necessary.

4. Faulty coil. 4. Refer to REMOVAL .ENGINE MISSES AT HIGH 1. Spark plugs dirty or 1. Correct as necessary.

2007 Dodge Pickup R3500

2007 ENGINE 5.7L - Service Information - Ram Truck

2007 Dodge Pickup R3500

2007 ENGINE 5.7L - Service Information - Ram Truck

hilario merino

jueves, 14 de abril de 2011 8:50:47 Page 1 2006 Mitchell Repair Information Company, LLC.

hilario merino

jueves, 14 de abril de 2011 8:50:51 Page 1 2006 Mitchell Repair Information Company, LLC.

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CYLINDER HEAD

HYDRAULIC TAPPETS

VALVES

Closes (ATDC) 255.0

Exhaust

Opens (BTDC) 236

Closes (ATDC) 32

Duration 269.3

Valve Overlap 37

DESCRIPTION SPECIFICATION

Valve Seat Angle 44.5 - 45.0

Valve Seat Runout (MAX) 0.05 mm (0.0019 in.)

Valve Seat Width (Finish)

Intake 1.18 - 1.62 mm

- (0.0464 - 0.0637 in.)

Exhaust 1.48 - 1.92 mm

- (0.0582 - 0.0755 in.)

Guide Bore Diameter (Std.) 7.975 - 8.00 mm

- (0.313 - 0.314 in.)

DESCRIPTION SPECIFICATION

Metric Standard

Body Diameter 21.387 - 21.405 mm 0.8420 - 0.8427 in.

Clearance (To Bore) 0.020 - 0.063 mm 0.0007 - 0.0024 in.Dry Lash 3.0 mm (at the valve) 0.1181 in.

DESCRIPTION SPECIFICATION

Face Angle 45.0 - 45.5

Head Diameter

Intake 50.67 - 50.93 mm (1.99 - 2.00 in.)Exhaust 39.27 - 39.53 mm

(1.54 - 1.55 in.)Length (Overall)Intake 123.38 - 123.76 mm (4.857 - 4.872 in.)

Exhaust 120.475 - 120.855 mm (4.743 - 4.758 in.)Stem Diameter

Intake 7.935 - 7.953 mm (0.312 - 0.313 in.)Exhaust 7.932 - 7.950 mm

(0.312 - 0.313 in.)Stem - to - Guide Clearance

2007 Dodge Pickup R3500

2007 ENGINE 5.7L - Service Information - Ram Truck

hilario merino

jueves, 14 de abril de 2011 8:50:48 Page 5 2006 Mitchell Repair Information Company, LLC.

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