Oil Pressure Test; Valves And Cylinder Head; Intake Valve Cleaning; Valve Train Analysis - Ford LRG-423 Service Manual

01-11 Engine Service
01-l 1
SERVICE PROCEDURES (Continued)
7.
IO.
Check for plugged oil drain-back holes in cylinder
- heads (6049) and cylinder block (6010).
If condition still exists, perform a cylinder
compression test as described in this section,
and/or perform a cylinder leak detection test with
Rotunda Pressurization Kit 014-00705, or
equivalent. This can be helpful in determining the
source of oil consumption, as an example,
valves, piston rings, etc.
Check valve guides (6510) for excessive
clearance. Replace all valve stem seals (6A517)
after correct valve guide clearance has been
verified.
NOTE: After checking for worn parts, if it is
determined parts should be replaced, make sure
correct replacement parts are used. Worn or
damaged internal engine components can cause
excessive oil consumption. Small deposits of oil
on tip of spark plugs (12405) can be a clue to
internal oil consumption. If internal oil
consumption still persists, proceed as follows:
a. Remove intake manifold(s), cylinder heads
(6049), oil pan and oil pump.
b. Check piston ring clearance, ring gap and ring
orientation as outlined in this section. Service
as required.
c. Check for excessive bearing clearance as
outlined in this section. Service as required.
11.
Perform Step 5 again to verify that the oil
consumption concern has been resolved.
Oil Pressure Test
SPECIAL SERVICE TOOL(S) REQUIRED
Description
I
Tool Number
I
1 Engine Oil Pressure Gauge
1 T73L-6600-A
I
1.
2.
3.
4.
5.
6.
Disconnect and remove the oil pressure sensor
(9278) from the engine.
Connect an Engine Oil Pressure Gauge
T73L-6600-A and Transmission Test Adapter
D87C-77000-A, or equivalent, to the oil pressure
sensor screw port.
Run the engine until normal operating
temperature is reached.
Run the engine at 3,000 rpm and record the
gauge reading.
The oil pressure should be:
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250-490 kPa (36-71 psi) at 3,000 rpm.
If the pressure is not within specification, check
the following possible sources:
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Insufficient oil
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Oil leakage
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Worn or damaged oil pump (6621)
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Clogged oil pump screen cover and tube
(6622)
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Excessive main bearing clearance
0 Excessive connecting rod bearing clearance
ValveTrain Analysis
- Static (Engine Off)
Rocker Arm/Camshaft Follower Cover Removed
NOTE: Static Valve Train Analysis, with the engine off,
is to be performed before Dynamic Valve Train
Analysis, which is performed with engine running.
NOTE: Remove valve cover (6582) as outlined in this
section.
Check for damaged and/or severely worn parts,
correct assembly, and use of correct parts by
proceeding with the static engine analysis.
Rocker/Camshaft Follower Arm Assemblies
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Check for loose mounting bolts, studs and nuts.
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Check for a plugged oil feed in the rocker arm
(6564), or cylinder head (6049).
Camshaft - 2.3L Engine
Inspect camshaft, camshaft lobes and journals for
excessive wear or scoring. Repair or replace as
necessary.
Valve Springs
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Check for broken or damaged parts.
Valve Spring Retainer and Valve Spring Keys
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Check for proper seating of valve spring retainer
keys (6518) on valve stem and in valve spring
retainer (6514).
Valves and Cylinder Head
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Check for signs of improper head gasket (6051)
installation, such as the shape of the head and
block and shape of the gasket not matching.
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Check for signs of cylinder head gasket leakage
such as coolant or oil leaking between the cylinder
block (6010) and cylinder head (6049).
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Check for plugged oil drain-back holes.
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Check for worn or damaged valve tips.
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Check for missing or damaged intake and exhaust
valve stem seals (6A517).
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Check valve clearance.
0 Check installed spring height.
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Check for missing or worn valve spring seats, if
equipped.
Intake Valve Cleaning (Valves Installed)
Cleaning and Inspection
NOTE: The intake valve cleaning procedure is to be
used if there is a concern with engine hesitation, rough
idle, long crank times, and stall at idle and engine
engagement after cold starts.
NOTE: Many fluids are available to clean carburetors.
Some cleaning fluids also claim to remove intake valve
deposits (IVD). Engineering evaluation of these fluids
indicates no ability to remove the intake valve
deposits. If engine performance concerns have been
affected by cleaning fluids, it is most likely due to
cleanup of carburetor deposits. IVD is more difficult to