For PCV valve replacement, see your dealer or a qualified service
technician. Refer to the
Scheduled Maintenance Guide
for the
appropriate intervals for changing the PCV valve.
Replace the PCV valve with one that meets Ford material and
design specifications for your vehicle, such as a Motorcraft or
equivalent replacement part. The customer warranty may be void
for any damage to the emissions system if such a PCV valve is not
used.
2
For spark plug replacement, see your dealer or a qualified service
technician. Refer to the
Scheduled Maintenance Guide
for the
appropriate intervals for changing the spark plugs.
Replace the spark plugs with ones that meet Ford material and
design specifications for your vehicle, such as Motorcraft or
equivalent replacement parts. The customer warranty may be
void for any damage to the engine if such spark plugs are not
used.
Refer to Vehicle Emissions Control Information (VECI) decal for spark
plug gap information.
REFILL CAPACITIES
Fluid
Ford Part
Name
Application
Capacity
Brake fluid
Motorcraft High
Performance
DOT 3 Motor
Vehicle Brake
Fluid
All
Fill to max line
on reservoir
Engine oil
(including filter
change)
4
Motorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-20 Super
Premium Motor
Oil (Canada)
4.6L
5.7L (6.0
quarts)
Fuel tank
N/A
All
85.2L (22.5
gallons)
2004 Aviator f/k/a Navigator LS
(231)
Owners Guide (post-2002-fmt)
USA English
(fus)
Maintenance and Specifications
331