2003 FORD MUSTANG Oil pan

z
intake manifold gaskets
z cylinder head gaskets
z oil bypass filter
z oil filter adapter
z engine front cover
z oil filter adapter and filter body
z oil level indicator tube connection
z oil pressure sensor
Leakage Points— Under Engine—With Vehicle on Hoist
z oil pan gaskets (6710)
z oil pan sealer
z oil pan rear seal (6723)
z engine front cover gasket
z crankshaft front seal (6700)
z crankshaft rear oil seal (6701)
z crankshaft main bearing cap side bolts
z oil filter adapter and filter body
z oil cooler, if equipped
Leakage Points— With Transmission and Flywheel Removed
z crankshaft rear oil seal
z rear main bearing cap parting line
z rear main bearing cap and seals
z flywheel mounting bolt holes (with flywheel [6375] installed)
z camshaft rear bearing covers (6266) or pipe plugs at the end of oil passages
Oil leaks at crimped seams in sheet metal parts and cracks in cast or stamped parts can be detected
when using the dye method.
Compression Test— Compression Gauge Check
1. Make sure the oil in the crankcase is of the correct viscosity and at the correct level and that the battery (10655) is correctly charged. Operate the vehicle until the engine is at normal operating
temperature. Turn the ignition switch to the OFF position, then remove all the spark plugs
(12405).
2. Set the throttle plates in the wide- open position.
3. Install a compression gauge such as the Compression Tester in the No. 1 cylinder.
4. Install an auxiliary starter switch in the starting circuit. With the ignition switch in the OFF position, and using the auxiliary starter switch, crank the engine a minimum of five compression
strokes and record the highest reading. Note the approximate number of compression strokes Klj . 7 ba
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6. Carry out an oil consumption test:
a. Drain the engine oil, remove the oil bypass filter (6714) and refill with one liter (quart) less than
the recommended amount.
b. Run the engine for three minutes (10 minutes if cold), and allow the oil to drain back for at least five minutes with the vehicle on a level surface.
c. Remove oil level dipstick and wipe clean. (Do not wipe with anything contaminated with silicone compounds.) Reinstall the oil level dipstick, being sure to seat it firmly in the oil level indicator
tube (6754). Remove the oil level dipstick and draw a mark on the back (unmarked) surface at
the indicated oil level. This level should be about the same as the MIN or ADD mark on the face
of the oil level dipstick.
d. Add one liter (quart) of oil. Restart the engine and allow to idle for at least two minutes. Shut off the engine and allow the oil to drain back for at least five minutes. Mark the oil level dipstick,
using the procedure above.
e. Record the vehicle mileage. f. Instruct the customer to drive the vehicle as usual and perform the following:
„Check the oil level regularly at intervals of 160 to 240 km (100- 150 miles).
„ Return to the service point when the oil level drops below the lower (MIN or ADD) mark
on the oil level dipstick.
„ Add only full liters (quarts) of the same oil in an emergency. Note the mileage at which
the oil is added.
g. Check the oil level under the same conditions and at the same location as in Steps 6c and 6d.
„Measure the distance from the oil level to the UPPER mark on the oil level dipstick and
record.
„ Measure the distance between the two scribe marks and record.
„ Divide the first measurement by the second.
„ Divide the distance driven during the oil test by the result. This quantity is the
approximate oil consumption rate in kilometers per liter or in miles per quart.
h. If the oil consumption rate is unacceptable, go to Step 7.
7. Check the positive crankcase ventilation (PCV) system. Make sure the system is not plugged.
8. Check for plugged oil drain- back holes in the cylinder heads and cylinder block.
9. If the condition still exists after performing the above steps, go to Step 10.
10. Perform a cylinder compression test or perform a cylinder leak detection test with Engine Cylinder Leak Detection/Air Pressurization Kit. This can help determine the source of oil
consumption such as valves, piston rings or other areas.
11. NOTE: After determining if new parts should be installed, make sure correct parts are used.
Check valve guides for excessive guide clearance. Install new all valve stem seals (6571) after
verifying valve guide clearance.
12. Worn or damaged internal engine components can cause excessive oil consumption. Small deposits of oil on the tips of spark plugs can be a clue to internal oil consumption. If internal oil
consumption still persists, proceed as follows:
a. Remove the engine from the vehicle and place it on an engine work stand. Remove the intake manifolds (9424), cylinder heads, oil pan (6675) and oil pump (6600).
b. Check piston ring clearance, ring gap and ring orientation. Repair as necessary.
c. Check for excessive bearing clearance. Repair as necessary.
13. Repeat the oil consumption test (Step 6) to confirm the oil consumption concern has been resolved. Klj . 10 ba
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z
incorrectly functioning valve tappet
z air in lubrication system
z excessive valve guide wear
z low oil pressure
Excessive collapsed valve tappet gap can be caused by loose rocker arm seat bolts/nuts, incorrect
initial adjustment or wear of valve tappet face, or worn roller valve tappets, push rod (6565), rocker
arm (6564), rocker arm seat or valve tip. With valve tappet collapsed, check gap between the valve tip
and the rocker arm to determine if any other valve train parts are damaged, worn or out of adjustment.
An incorrectly functioning valve tappet can be sticking, caused by contaminants or varnish inside the
tappet. The tappet can have a check valve that is not functioning correctly, which can be caused by an
obstruction, such as dirt or chips that prevent the check valve from closing, or a broken check valve
spring. A tappet with a leakdown time out of specification can cause tappet noise. If no other cause for
noisy valve tappets can be found, the leakdown rate should be checked and new valve tappets
installed if found to be out of specification.
Assembled valve tappets can be tested with Hydraulic Tappet Leakdown Tester to check the leakdown
rate. The leakdown rate specification is the time in seconds for the plunger to move a specified
distance while under a 22.7 kg (50 lb) load.
Air bubbles in the lubrication system will prevent the valve tappet from supporting the valve spring
load. This can be caused by too high or too low an oil level in the oil pan or by air being drawn into the
system through a hole, crack or leaking gasket on the oil pump screen cover and tube. Klj . 17 ba
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A/C compressor bracket-
to-cylinder head stud bolt 25 18 —
Oil level indicator tube-
to-cylinder head bolt 10 — 89
Coolant recovery reservoir bracket-to-
GOP bolts 9 — 80
Motor mount-
to-subframe nuts 115 85 —
Oil pan drain plug 26 19 —
Wire harness bracket to motor mount nut 27 20 —
Steering column pinch bolt 47 35 —
Front subframe-
to-body bolts 90 66 —
Front subframe-
to-shock tower bolts 115 85 —
Oil pan-to-
cylinder block bolts a — — —
Oil pan-to-
transmission bell housing 45 33 —
Main bearing bridge nuts 32 24
Oil pump cover-
to-engine front cover bolts 25 18 —
Oil pump cover-
to-engine front cover bolt 10 89 —
Oil pickup tube-
to-cylinder block bolts 25 18 —
Oil pickup tube-
to-oil pan baffle nut 48 35 —
Flywheel-
to-crankshaft bolts 80 59 —
Wire harness bracket-
to-motor mount stud- nut 27 20 —
Engine ground strap-
to-motor mount nut 27 20 —
Motor mount-
to-motor mount bracket bolts 70 52 —
RH motor mount-
to-motor mount bracket nut 70 52 —
Hood ground strap-
to-hood hinge bolt 12 9 —
Hood hinge nuts 12 9 —
Generator mounting bracket 25 18 —
Power steering pump bracket nuts 8 — 71
Power steering pump bolts 25 18 —
Valve tappet guide plate bolts 12 9 —
Generator positive cable nut 10 — 89
Power steering pressure tube to pump nut 40 30 —
Accelerator cable bracket-
to-intake manifold bolts 10 — 89
42-
pin connector bolt 10 — 89
Transmission oil cooler tube bracket-
to-motor mount bracket nut 27 20
Torque converter-
to-flywheel nuts 36 27 —
Engine-
to-transmission bolts 40 30 —
Engine mount bracket-
to-engine bolts 70 52 —
Engine mount bracket-
to-engine nuts 70 52 —
Water pump pulley bolts 25 18 —
Oil filter
b — — —
Upper intake manifold-
to-lower intake manifold bolts a — — —
Lower intake manifold-
to-cylinder head bolts a — — —
Rocker arm pivot-
to-cylinder head bolts a — — — Klj . 5 ba
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Cylinder Block and Lower End Components 9 18801 Radio ignition interference capacitor
10 12281 Ignition wire set —
LH 11 18696 Tube assembly
12 9424 Intake manifold (lower)
13 9439 Intake manifold gasket —
RH 14 9439 Intake manifold gasket —
LH 15 9A424 Intake manifold seal (rear)
16 6A008 Cylinder head-
to-block dowel 17 6010 Cylinder block
18 6A373 Engine rear plate (automatic transmission)
19 6375 Flywheel (automatic transmission)
20 6375 Flywheel (manual transmission)
21 6A372 Engine rear plate (manual transmission)
22 6723 Oil pan rear seal
23 6675 Oil pan
24 7120 Pilot bushing
25 9278 Oil pressure sensor
26 9B339 Oil pressure sensor fitting
27 9A424 Intake manifold seal (front)
28 18663 Heater water outlet tube
29 8255 Thermostat housing-
to-intake manifold gasket 30 8592 Water outlet connection
31 9875 Water thermostat
32 9D475 EGR valve
33 9H465 Vacuum control solenoid
34 9723 Accelerator cable bracket
35 9E936 Throttle body gasket
36 9J433 EGR transducer
37 9E498 Vacuum hose
38 12280 Ignition wire set —
RH Klj . 5 ba
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9 6A333 Balance shaft front and rear bearing
10 6010 Cylinder block
11 6K564 Tappet guide plate and retainer —
RH 12 6K564 Tappet guide plate and retainer —
LH 13 6500 Valve tappet
14 376958 Balance shaft cover plug
15 6337 Crankshaft thrust main bearing
16 6701 Crankshaft rear oil seal
17 6A338 Crankshaft main bearing (lower)
18 6A339 Crankshaft thrust main bearing
19 6325 Rear main bearing cap
20 6327 Main bearing cap
21 6687 Oil pan baffle
22 6622 Oil pump screen cover and tube
23 6625 Oil pump inlet tube gasket
24 6334 Main bearing cap
25 6329 Main bearing cap
26 6303 Crankshaft
27 388907 Woodruff key
28 6333 Crankshaft main bearing (upper)
29 6284 Timing chain vibration damper
30 6263 Camshaft rear bearing
31 6262 Camshaft center bearing
32 6250 Camshaft
33 6265 Camshaft sprocket spacer
34 6269 Camshaft thrust plate
35 6256 Camshaft sprocket
36 6303 Crankshaft sprocket
37 6150 Piston ring
38 6152 Piston ring
39 6161 Piston ring
40 6159 Piston ring
41 6135 Piston pin
42 6200 Connecting rod
43 6211 Connecting rod bearing
44 6210 Connecting rod cap
45 6200 Connecting rod assembly
46 6100 Piston and connecting rod assembly
47 6108 Piston Klj . 7 ba
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16.
CAUTION: The cap screw is hidden; make sure to remove it or the engine front
cover will be damaged.
NOTE: Record the location, type and size of the fasteners.
Remove the engine front cover. zSlide the engine front cover off the two dowels.
z Remove and discard the engine front cover gasket.
Installation 1. CAUTION: In order to prevent foreign material from contaminating the engine block
or the engine front cover it is necessary to seal the coolant and oil passages of both
components. Failure to follow these directions will result in engine damage.
CAUTION: Do not use a surface conditioning pad or any other type of fibrous
abrasive disc to clean the gasket surfaces. Failure to follow these directions will result in
engine damage.
Clean and inspect the engine block and front cover as follows:
zPack the exposed portion of the oil pan with clean shop towels.
z Plug the oil and coolant passages.
z Clean the gasket surfaces.
z Clean all surfaces requiring gasket sealant with metal surface cleaner.
z Using compressed air, remove any remaining foreign material from the engine block and
engine front cover.
z Remove the shop towels from the oil pan.
z Remove the plugs or seals from the engine block and engine front cover. Klj . 4 ba
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Remove the cylinder head. Discard the cylinder head bolts.
Installation
NOTE: Do not use a fiber disc to clean the surfaces. Fibers from the disc can get into the oil pan and
oil and clog the oil bypass valve.
1. Clean and inspect the cylinder head for flatness. For additional information, refer to Section 303 - 00 .
2. Install a new head gasket on the cylinder block with the small hole to the front of the engine.
3. Position the cylinder head.
4. CAUTION: Always use new bolts.
NOTE: Lubricate the bolts with clean engine oil.
Install new bolts. Refer to the location note made during removal and make sure the bolts are
installed the correct location. 1. Install the new long bolts.
2. Install the new short bolts. Klj . 3 ba
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