I have a plugged orfice tube and want to know how to get at the tube .is there a easy way to get into the heater box to replace or does it have to be pulled right out
How did you discount the compressor?
is it turning?
is the fan blowing
is the compressor clutch closed.? and the compressor shaft spinning at full speed.>?
the evap core is covered in all FSM for this car. and and at alldata.com
its not a tube its an expansion VALVe
ill first list the exp, valve steps (then the harder part)
Disconnect the negative battery cable.
Discharge the air conditioning system.
Remove the evaporator assembly from the vehicle.
Remove the clamps to separate the upper and lower halves.
Using backup wrenches, remove the expansion valve from the evaporator.
now the part about #3 list
Disconnect the negative battery cable.
Discharge the air conditioning system.
Remove the glove compartment, as required.
Disconnect all electrical wiring and cables from the blower case.
Remove the blower case retaining bolts and case assembly.
Disconnect and plug the inlet and outlet lines to the evaporator.
Remove the upper and lower housing retaining bolts and remove the evaporator assembly from the vehicle.
Separate the case housing and remove the evaporator core.
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an orifice tube in what? (yes, yes, and yes)
1: one in the head for the oil gallery, 0.050" diameter
2: a set in the a/c expansion valve.
3: many in the automatic transmission if not stick trans.
4: Im sure, more, but need to know what system i car is failing
and symptoms. would make this 10x more easy
The orifice tube is located inside the low pressure line, usually just before the evaporator. DO NOT forget to measure and replace the oil that you get in the dryer, as a percentage of total system capacity for oil. It is special oil.
the fixed orifice is located in the inlet tube to the evaporator core, this is where the small high pressure AC line from the compressor connects to the tube sticking out of the engine firewall, u will most likely need a special tool to remove it, here is a web link to the tool, don't damage the evaporator core by trying to remove the orifice tube without this if it is stuck down in the tube.
Recover the refrigerant. Remove the engine air cleaner.Remove the vacuum brake booster. Remove the condenser tube. Remove the expansion (orifice) tube: Use needle-nose pliers in order to grip the orifice tube. Use a turning motion along with a push-pull motion in order to loosen the impacted orifice tube. Remove the orifice tube. Important: DO NOT use any solvents or chemicals to clean the expansion (orifice) tube porous plastic inlet filter. Inspect the expansion (orifice) tube for the following conditions and clean or replace with a new tube as indicated: Broken plastic frame, Inlet filter damaged or plugged with fine gritty material, replace tube. Inlet filter coated with metal chips, flakes, or slivers; coating may be removed with low pressure shop air ONLY and reused if cleaned satisfactorily. If reusing the tube, discard the O-ring seals and replace. This is from the gm service CD manual. keep me posted and good luck
the orfice tube is located behind the passenger battery box.You have to either buy a new line from the dealer or buy a replacement orfice tube with metal housing from the autoparts.
the orfice tube goes in the high pressure line, that is the small line near the accumulator, disconnect that line and the orfice is in the accumulator inlet tube, u may need an extra long nosed needle nose pliers to extract it.
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