Oldsmobile 52463741 Evaporator,A/C

Begin by emptying the air conditioning system and taking off the negative battery cable. Take off the air conditioning lines that link into the heater and evaporator unit on the passenger side of the firewall, while letting all liquids drain from the cooling system. The accumulator with a hose attaches to the evaporator outlet tube for engines with four cylinders, while the accumulator connects directly to the evaporator in V6 engines. Take off the wiring connector under the blower motor resistor, then pull on the large wiring bundle holder from the mounting stud at the upper housing corner. Lift out the coolant recovery tank, disconnect the relay mountings, loosen the nuts that anchor the housing, and remove the housing itself. Carefully unhook the bolts that attach the housing to the firewall, then push forward on the housing to break the strong sticky seal created by the gasket before lifting the housing off. To access the condenser core, remove the housing's upper and lower parts by taking off the clips and screws, then get rid of the condenser, and check for leaks, fixing any bent fins while you're at it. When you put in a fresh evaporator core, keep and move all sealing gaskets from the old unit itself. To reinstall the AC system, start by turning the process upside down, filling your cooling system again, and putting new R-134a-ready connectors on all connections. Lubricate them with the proper air-con oil. Put the foam gasket back when you put the housing back on the firewall. Just before having the system checked for leaks and fixes, fill up the new evaporator with 1 ounce of oil.

Before you can take out the air conditioning from a Blazer or Jimmy by Chevrolet, you must release all the air pressure and disconnect the car's negative battery connection. Undo the coolant system before taking off the air conditioner tubes from the blower/evaporator box next to the passenger firewall. Four-cylinder Blazers have their accumulator connected through a hose to the evaporator, while six-cylinder Jimmys have a direct attachment right on the evaporator. After disconnecting the blower motor resistor's electric wires, you need to now untie the rubber clip that holds all the wiring bundle next to its metal bracket. Slip out the computer and coolant recovery tank. After that, unhitch and sidestep the relay stand. Unscrew the two bolts holding the housing to the firewall, then unscrew the rest of the bolts. Pull the housing sideways until the seal breaks to take it off. Break the housing apart by taking off the connecting clips and screws, then remove the condenser and check for leakages and straighten any bumped fan fins. Keep all original gaskets when replacing your evaporator core, and put them on your new one. Reinstallation follows removal in reverse, always filling the coolant system and using fresh o-rings treated with specific R-134a oil. Place the foam gasket correctly when reinstalling the housing. Add one fluid ounce of fridge oil when installing a fresh evaporator, then leave the repair station to vacuum, fill, and check for leaks.

The first step is to discharge the system and disconnect the battery cable.

After removing the housing, you need to separate the upper and lower halves of the housing and remove the condenser.