2003 FORD MUSTANG check engine

GENERAL PROCEDURES
Valve —
Seat Width
1. Measure the valve seat width. If necessary, grind the valve seat to specification. zMeasure the intake valve seat width.
z Measure the exhaust valve seat width.
z Recheck the valve spring installed length after the seats have been ground, and shim the
valve springs as necessary to achieve the correct installed spring length.
z Refer to the appropriate section in Group 303 for the procedure.
SECTION 303-
00: Engine System — General Information 2003 Mustang Workshop Manual Klj . 1 ba
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GENERAL PROCEDURES
Valve —
Seat Runout
1. Use the Valve Seat Runout Gauge to check valve seat runout.
SECTION 303-
00: Engine System — General Information 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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GENERAL PROCEDURES
Spark Plug —
Inspection
1. Inspect the spark plug for a bridged gap. zCheck for deposit build- up closing the gap between the electrodes. Deposits are caused
by oil or carbon fouling.
z Clean the spark plug.
2. Check for oil fouling. zCheck for wet, black deposits on the insulator shell bore electrodes, caused by excessive
oil entering the combustion chamber through worn rings and pistons, excessive valve- to-
guide clearance or worn or loose bearings.
z Correct the oil leak concern.
z Install a new spark plug.
3. Inspect for carbon fouling. Look for black, dry, fluffy carbon deposits on the insulator tips, exposed shell surfaces and electrodes, caused by a spark plug with an incorrect heat range,
dirty air cleaner, too rich a fuel mixture or excessive idling.
zClean the spark plug.
SECTION 303-
00: Engine System — General Information 2003 Mustang Workshop Manual Klj . 1 ba
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4. Inspect for normal burning.
zCheck for light tan or gray deposits on the firing tip.
5. Inspect for pre- ignition, identified by melted electrodes and a possibly damaged insulator.
Metallic deposits on the insulator indicate engine damage. This may be caused by incorrect
ignition timing, wrong type of fuel or the unauthorized installation of a heli- coil insert in place of
the spark plug threads.
zInstall a new spark plug.
6. Inspect for overheating, identified by a white or light gray spots and with bluish- burnt
appearance of electrodes. This is caused by engine overheating, wrong type of fuel, loose spark
plugs, spark plugs with an incorrect heat range, low fuel pump pressure or incorrect ignition
timing.
zInstall a new spark plug. Klj . 2 ba
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GENERAL PROCEDURES
Exhaust Manifold —
Inspection
1. Place a straight edge across the exhaust manifold flanges and check for warping with a feeler gauge.
SECTION 303-
00: Engine System — General Information 2003 Mustang Workshop Manual Special Tool(s)
Straight Edge
303-
D039 (D83L-4201- A) or
equivalent Klj . 1 ba
12003 Mustang Workshop Manual
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Assembly
NOTE:
During engine assembly, it may by necessary to check bearing clearances and end play. For
additional information, refer to Section 303 - 00 .
1. Record the main bearing code found on the front of the engine block.
2. Record the main bearing code found on the back of the crankshaft.
3. Using the data recorded earlier and the Bearing Select Fit Chart, Standard Bearings Chart Crankshaft Seal Installer
303-
635
Material Item Specification
Silicone Gasket and Sealant
F7AZ-
19554- EA or equivalent WSE-
M4G323-
A4 Super Premium SAE 5W-20
Motor Oil
XO- 5W20- QSP or equivalent WSS-
M2C153- H Klj . 3 ba
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19.
NOTE: The piston grade number will face the rear of the engine.
Check that the piston/connecting rod assembly is oriented with the identification marks facing
the front of the engine.
20. CAUTION: Do not scratch the cylinder walls or the crankshaft journals with the
connecting rod.
NOTE: Make sure the crankshaft is at TDC. Klj . 10 ba
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44. Connect the upper radiator hose from the water outlet adapter.
45. Connect the fuel lines. For additional information, refer to Section 310
- 00 .
46. Install the battery. For additional information, refer to Section 414 - 01 .
47. Install the air cleaner and outlet tube. For additional information, refer to Section 303 - 12 .
48. Install the degas bottle. For additional information, refer to Section 303 - 03A or
Section 303 -
03B .
49. Fill the fluids to the correct levels.
50. Start the engine and check for leaks. Stop the engine and recheck the fluid levels.
51. Recharge the A/C system. For additional information, refer to Section 412 - 00 .
52. Install the hood. Klj . 12 ba
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