Q45 V8-4494cc 4.5L DOHC (VH45) (1992)
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Perform a visual inspection of all refrigerant parts, fittings, hoses and components for signs of A/C lubricant leakage, damage and corrosion. A/C
lubricant leakage may indicate an area of refrigerant leakage. Allow extra inspection time in these areas when using either an electronic refrigerant
leak detector or fluorescent dye leak detector.
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When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all system components and connections.
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If dye is observed, confirm the leak with an approved electronic leak detector. It is possible a prior leak was repaired and not properly cleaned.
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When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected leak area at 1 or 2 inches per second and
no further than ...inch from the component.
NOTE:
Moving the electronic leak detector probe slower and closer to the suspected leak area will improve the chances of finding a leak.
SERVICE PROCEDURE
1.
Verify the A/C system pressure (with the A/C system off) is 50 psi. Add refrigerant as needed to achieve 50 psi pressure.
2.
Check the vehicle's A/C system to determine if refrigerant dye was previously installed.
NOTE:
Vehicles equipped with refrigerant dye: (1) have an identification label (see Figure 1) installed near the Original Equipment (OE) A/C system charge
label (2) have refrigerant dye residue inside the low side service fitting*.
* It is normal for a small amount of refrigerant to be present in the low side service fitting. If refrigerant dye is present in the low side service fitting, this
condition does not indicate a leak.
A.
If the A/C system has refrigerant dye in it, proceed with step 4 (i.e., "With the engine off, check all components, fittings and lines for
leaks...")
B.
If the A/C system does NOT have refrigerant dye, inject refrigerant dye as follows, then proceed with step 3 (i.e., "Operate the A/C system
for 20 minutes...")
1.
Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (J-41459).