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03-oo-16
Engine-Service
03-oo- 1 6
SERVICE PROCEDURES (Continued)
4.
Zero the dial indicator. Push crankshaft forward
and note reading on dial.
5.
If
the end play exceeds the wear limit listed in the
specifications in Section 03-01A (3.8L) or
Section 03-018 (4.6L), replace the lower
crankshaft thrust main bearing (6337). Inspect
the crankshaft for damage to the thrust face
before installing the new crankshaft thrust main
bearing. If the end play is less than the minimum
limit, inspect the thrust bearing faces for
scratches, burrs, nicks or dirt.
If
the thrust faces
are not damaged or dirty, they probably were not
aligned properly. Lubricate and install the lower
crankshaft thrust main bearing and crankshaft
thrust washer (6334). Align the faces, following
Main Bearing Replacement procedure in Section
03-Q1A (3.8L) or Section 03-018 (4.6L).
Connecting Rod Side Clearance
1. Install Dial Indicator with Bracketry TOOL -420 1-C
or equivalent so that the contact point rests
against the connecting rod cap.
2. Pull connecting rod cap toward front of engine
and zero the dial indicator.
3. Push cap toward rear of engine and observe
amount of side clearance on dial indicator.
4.
If
side clearance exceeds specification, replace
connecting rod (6200) and cap. Refer to
Specifications in Section 03-01A (3.8L) or
Section 03-018 (4.6L).
If side clearance is less than specification,
remove connecting rod and cap and inspect for
scratches, burrs, nicks or dirt between
crankshaft (6303) and connecting rod. Refer to
Section 03-01 A (3.8L) or Section 03-01 B (4.6L)
under Specifications.
Cylinder Block
Cleaning and Inspection
If the engine is disassembled, thoroughly clean the
cylinder blocks (6010) with solvent. Remove old
gasket material from all machined surfaces. Remove
all pipe plugs that seal oil passages and clean out all
the passages. Blow out all passages, then bolt holes
and other openings with compressed air. Make sure
threads in the cylinder head bolt holes are clean. Dirt
in the threads may cause binding and result in a false
torque reading. Use a tap to true-up threads and to
remove all deposits. Thoroughly clean the grooves in
the crankshaft bearings and bearing retainers.
Check all machined surfaces for burrs, nicks,
scratches and scores. Remove minor imperfections
with an oil stone.
Replace all plugs that show evidence of leakage.
Inspect the cylinder walls for scoring, roughness or
other signs of wear.
Cylinder Block Distortion
Check the cylinder blocks (6010) for flatness of the
head gasket surface following the procedure and
specifications recommended for the cylinder head
(6049). The cylinder blocks can be machined to bring
the head gasket surface within the flatness
specifications listed in Section 03-01A (3.8L) or
Section 03-Q1B (4.6L), but not to exceed 0.254 mm
(0.010 inch) stock removal from the original head
gasket surface.
Sand Holes or Porous Engine
Castings-Service
Cast Iron
Porosity or sand holes, which will cause oil seepage or
leakage, can occur with modern casting processes.
Make a complete inspection of engine and
transmission. If the leak is attributed to the porous
condition of the cylinder blocks or sand holes, service
with an epoxy sealer meeting Ford specification
M3D35-A (E). Do not service cracks with this
material. Service with this metallic plastic must be
confined to those cast-iron engine component
surfaces where the inner wall surface is not exposed
to engine coolant pressure or oil pressure. For
example:
•
cylinder block surfaces extending along the length
of the cylinder blocks, upward from the oil pan rail to
the cylinder water jacket but not including machined
areas.
•
lower rear face of the cylinder blocks.
•
CAUTION: Service is not recommended to the
intake manifold exhaust crossover section,
since temperatures can exceed the
recommended temperature limit of 260"C
(500"F).
•
intake manifold (9424)
•
cylinder head along the valve cover gasket surface
1997 Thunderbird, Cougar July 1996
Содержание Thunderbird
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