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Oil Weepage
Some vehicles
equipped with the Romeo 4.6L 2V engine or 5.4L 2V
Windsor and 5.4L Supercharged engine may exhibit an oil
leak or oil weepage from the cylinder head gasket at the
right-hand rear or the left-hand front of the engine.
Oil weepage is not considered detrimental to engine
performance or durability. An oil leak may be caused by
metal chip debris lodged between the head gasket and the
block, chip debris between the cylinder head and the
head gasket, or by damage to the cylinder head sealing
surface that ....
Some vehicles
equipped with the Romeo 4.6L 2V engine or 5.4L 2V
Windsor and 5.4L Supercharged engine may exhibit an oil
leak or oil weepage from the cylinder head gasket at the
right-hand rear or the left-hand front of the engine.
Oil weepage is not considered detrimental to engine
performance or durability. An oil leak may be caused by
metal chip debris lodged between the head gasket and the
block, chip debris between the cylinder head and the
head gasket, or by damage to the cylinder head sealing
surface that occurred during the manufacturing process.
Once an oil leak
is verified with a black light test at the head gasket
joint, replacement of the head gasket can be performed.
If the head was damaged by chip contamination, the head
should be replaced. A revised “service-only” gasket is
now released for both of these cases.
Required for
service are:
• A straightedge (machine flatness toleranced to 0.0002”
per foot in length) that’s available from local tool
dealers or as provided by Ford Motor Company;
• Motorcraft Silicone Gasket Remover (ZC-30);
• Metal Surface Prep (ZC-31); and
• Service-only gasket (3U7Z-6051-BA for driver’s side
and/or 3U7Z-6051-AA for passenger’s side) with the new
embossed area.
Applicable Vehicles:
1999-2002 Crown Victoria, Mustang, Town Car; 1999-2001 E
Series, Expedition, F-150 F-SuperDuty; 2000-’01
Excursion; 1998-’99 Navigator and 1999-2002 Grand
Marquis.
Repair Procedure
Cylinder heads damaged by brinnelling (depression marks
from original gasket) of the head may still be reusable.
The revised “service-only” gasket has a feature by which
the embossed sealing area does not follow the same
sealing path as the original gasket. This area is
surrounding the High Pressure Oil Feed (HPOF) area. It’s
triangular in shape and is found in the rear of the
passenger’s side cylinder head, or in the front of the
driver’s side cylinder head (see Figures 1 and 2).
The engine should
be allowed to cool before removing the head or warpage
may occur in deck flatness.
The cylinder head
and block decks should be cleaned before performing a
flatness check. Dark metal stains below the surface of
the metal are normal. Do not attempt to polish off the
stains with grinders or scrapers. Use a plastic scraper
(or plastic ice scraper or equivalent) to pull away any
residual silicone RTV with ZC-30 and ZC-31 applied in
sequence.
The repair
information and labor times have been updated for both
cars and trucks using 4.6L 2V and 5.4L 2V and
Supercharged 5.4L engines. These include instructions to
remove the engine prior to removing the cylinder head.
Labor times allow for extra time in engine removal and
cylinder head deck leak repair out of the vehicle.
Cylinder head kits
are available on most applications from Ford and include
complete head assembly, with cam and valves; head bolts,
service-only head gasket; both intake gaskets exhaust
gasket; one rocker cover gasket; and one set of exhaust
studs and nuts.
If it’s found that
only one head is leaking, it’s not necessary to remove
the other head. Repair only the side for which leakage
occurs.
Thanks
to Eric Seifert for
this tidbit
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