Service Procedures; Engine Oil Leaks; Pressure Method; Fluorescent Oil Additive Method - Ford LRG-423 Service Manual

01-6 Engine Service
01-6
SERVICE PROCEDURES
Positive Crankcase Ventilation (PCV) System
Closed-Type
A malfunctioning closed crankcase ventilation system
may be indicated by loping or rough engine idle. Do
not attempt to compensate for this idle condition by
disconnecting the crankcase ventilation system and
making an air bypass or idle speed adjustment. The
removal of the crankcase ventilation system from the
engine will adversely affect fuel economy and engine
crankcase ventilation with resultant shortening of
engine life.
Engine Oil Leaks
NOTE: Due to their remote location, rear engine oil
leaks may be very difficult to pinpoint. This area is also
very difficult to clean. Make sure to eliminate all other
possibilities before removing the engine to repair a
suspected leak in this area.
When diagnosing engine oil leaks, it is important that
the source and location of the leak be positively
identified prior to service. There are two methods of
diagnosing engine oil leaks. The following procedure
has been found to be very effective and requires only
a minimum of equipment. Prior to using this
procedure, it is important to clean the cylinder block
(6010), cylinder heads (6049), valve covers (6582), oil
pan (6675) and flywheel housing areas with a suitable
solvent to remove all traces of oil.
Fluorescent Oil Additive Method
To perform oil leak diagnosis using Rotunda Oil Leak
Detector Kit 112.R0030, or equivalent, perform the
followina procedure.
1. Clean engine with a suitable solvent to remove all
traces of oil.
2. Drain engine oil from crankcase and refill with
recommended oil, premixed with Rotunda
Al 9016-A
Fluorescent Oil Additive 112-ROOI 5, or
equivalent. Use 29.6ml (1 fluid ounce) of
fluorescent additive. If oil is not premixed,
fluorescent additive must be added to crankcase
first.
3. Run engine for 15 minutes. Stop engine and
inspect all seal and gasket areas for leaks using
Rotunda Oil Leak Detector Y 112-R0021 (part of
112-R0030 Kit) Lamp or equivalent. A clear bright
yellow or orange area will identify leak. For
extremely small leaks, several hours may be
required for the leak to appear.
4. If necessary, pressurize main oil gallery system to
locate leaks due to improperly sealed, loose or
cocked plugs. If flywheel bolts leak oil, look for
sealer on threads.
5. Service all leaks as required.
Pressure Method
As an alternative testing procedure, the crankcase can
be pressurized, not to exceed 27 kPa (4 psi), to locate
oil leaks. The following materials are required to
fabricate the tool to be used.
l
Air supply and air hose.
l
Air pressure gauge that registers pressure in
increments of one psi.
l
Air line shutoff valve.
l
Appropriate fittings to attach the above parts to oil
fill, PCV grommet holes and PCV fresh air hose
tube.
l
Appropriate plugs to seal any openings leading to
crankcase.
l
A solution of liquid detergent and water to be
applied with a suitable type applicator such as a
squirt bottle or brush.
Fabricate the air supply hose to include the air line
shutoff valve and the appropriate adapter to permit the
air to enter the engine through the rocker arm cover
tube. Fabricate the air pressure gauge to a suitable
adapter for installation on the engine at the oil fill
opening.
Testing Procedure
1.
CAUTION: Use extreme caution when
pressurizing crankcase. Applying air
pressure above specified pressure risks
damage to seals, gaskets and core plugs.
Under no circumstances should pressure be
allowed to exceed 27 kPa (4 psi).
Open air supply valve until pressure gauge
maintains 20 kPa (3 psi).
2. Inspect sealed and/or gasketed areas for leaks
by applying a solution of liquid detergent and
water over areas for formation of bubbles, which
indicates leakage.