gas type FORD MUSTANG 2003 Owner's Guide

Heater Core
WARNING: Carbon monoxide gas is colorless, odorless and dangerous. If it is necessary
to operate the engine with the vehicle in a closed area such as a garage, always use an exhaust
collector to vent the exhaust gases outside the closed area. Failure to follow these instructions
may result in personal injury.
1. NOTE: Testing of returned heater cores reveals that a large percentage of heater cores are
good and did not require installation of a new heater core. If a heater core leak is suspected, the
heater core must be tested by following the Plugged Heater Core Component Test before the
Heater Core Pressure Test. Carry out a system inspection by checking the heater system
thoroughly as follows:
Inspect for evidence of coolant leakage at the heater water hose to heater core attachments. A
coolant leak in the heater water hose could follow the heater core tube to the heater core and
appear as a leak in the heater core.
CAUTION: Spring- type clamps are installed as original equipment. Installation and
overtightening of non- specification clamps can cause leakage at the heater water hose
connection and damage the heater core.
2. Check the integrity of the heater water hose clamps.
Heater Core— Plugged
WARNING: The heater core inlet hose will become too hot to handle if the system is
working correctly.
1. Check to see that the engine coolant is at the correct level.
2. Start the engine and turn on the heater.
3. When the engine coolant reaches operating temperature, feel the heater core outlet hose to see if it is hot.
If it is not hot:
zthe heater core may have an air pocket.
z the heater core may be plugged.
z the thermostat is not working correctly.
Heater Core— Pressure Test
Use the radiator/heater core pressure tester to carry out the pressure test. 1. NOTE: Due to space limitations, a bench test may be necessary for pressure testing.
Drain the coolant from the cooling system. For additional information, refer to Section 303 - 03A
or
Section 303 - 03B .
2. Disconnect the heater water hoses from the heater core. For additional information, refer to Klj . 37 ba
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An A/C compressor pressure relief valve is incorporated into the compressor A/C manifold and tube to:
zrelieve unusually high refrigerant system discharge pressure buildups. For specifications
regarding operating pressure(s), refer to Section 412 - 00 .
z prevent damage to the A/C compressor and other system components.
z avoid total refrigerant loss by closing after the excessive pressure has been relieved.
A/C Condenser Core
The A/C condenser core has the following characteristics:
zIt is an aluminum fin and tube design heat exchanger located in front of the vehicle radiator
(8005).
z It cools compressed refrigerant gas by allowing air to pass over fins and tubes to extract heat
and by condensing gas to liquid refrigerant as it is cooled.
Refrigerant Lines
The condenser to evaporator tube (19835) contains the high pressure liquid refrigerant upstream of the
evaporator core orifice.
The A/C manifold and tube (19D734) is attached to the A/C compressor, is sealed with O- ring seals,
and has the following features:
zThe upstream side contains low pressure refrigerant gas.
z The downstream side contains high pressure refrigerant gas and a fitting used to mount a
serviceable high pressure A/C charge port valve.
z The downstream side also contains a fitting used to mount the refrigerant containment switch
(3.8L) or dual- function pressure switch (4.6L). A long- travel Schrader-type valve stem core is
installed in the fitting so that the switch can be removed without discharging the A/C system. Klj . 4 ba
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DESCRIPTION AND OPERATION
Body Sealer Types And Applications
Liquid Butyl Sealer
HB Fuller E709-19554-
B or equivalent meeting Ford Specification ESB-M4G162- A:
z Does not run.
z Is fast drying.
z Remains semi-elastic.
z Can be used for seam sealing on the floorpan, wheelhouse, body rocker panels, door openings,
and drip rails.
Caulking Cord
3M Strip Caulk- Black 051135-08578 or equivalent meeting Ford specification ESB-M4G32- A:
z Is a heavy- bodied, plastic base with a filler.
z Is commonly known as perma-gum.
z Is used on spot- welds holes, around moulding clips, and between surfaces not sealed with a
gasket.
Weatherstrip Adhesive
Weatherstrip and Rubber Adhesive E8AZ-19552- A or equivalent meeting Ford specification ESB-
M2G14- A:
z Is a quick drying, strong adhesive designed to hold weatherstripping onto all body panels and
surrounding metal.
Silicone Lubricant
Silicone Lubricant C0AZ-19553-AA meeting Ford specification ESR- M13P4-A:
z Is used to keep the door and the window weatherstrip pliable and soft.
z Should be applied to the weatherstrip at every lubrication period.
z Makes the door easier to close.
z Retards weatherstrip squeaks.
z Retards weatherstrip wear.
z Helps retain door window alignment by reducing friction between the glass frame and the rubber
weatherstrip.
z Should not be used prior to painting.
SECTION 501-
00: Body System — General Information 2003 Mustang Workshop Manual Klj . 1 ba
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