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READ that Technical Bulletin. This has been brought up several times, and
if you would have read the bulletin, you would have read that if a ticking
develops from prolonged idle the its the oil pump.
READ:
AERA Technical Bulletin TB1633
Manufacturer: FORD
Displacement: 2 Ltr.
Engine Ticking Noise on 1993-96 Ford 2.0L VIN A Engines
The AERA Technical Committee offers the following informationn regarding an
engine ticking noise on 1993-96 Ford 2.0L VIN A engines. This metallic
ticking noise has been heard at idle and may be associated with rough
running, stalling, or reduced power of the engine.
This condition may be caused by an uneven wear pattern in the oil pump
control plunger, which results in air entering the oiling system. When air
enters the oiling system, the hydraulic lash adjusters will bleed down
causing a ticking noise in the upper area of the engine. To test for air in
the oiling system, Ford recommends starting the engine and letting it idle
for 10 minutes. If a ticking noise is present, replacement of the oil pump
is recommended.
The plunger within the oil pump may also stick, causing rough running,
stalling or reduced power of the engine. Starting the engine and running it
at 3000 RPM while monitoring oil pressure can detect a stuck plunger.
Normal
oil pressure may first be 100 psi at startup and then drop down to 80 psi
after maximum engine temperature is reached. Normal readings should be
57-71
psi at 3000 RPM. If the engine oil pressure stays near 100 psi, replacement
of the oil pump is recommended.
The revises oil pump, Part#F72Z-6600-AA, has an improved oil pump plunger
which reduces the possibility of the above mentioned problems.
The AERA Technical Committee
December 1998 - TB 1633
I apoligize for sounding rude but this bulletin has been posted several
times, and is very important to 2.0L owners so I figured that everyone would
have read it.
Enjoy,
Bryan
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