1989 BMW 535i Changing O-Ring seals on evaporator valve

Hello .. thanks for the donation .. much apreciated Hope this helps EVAPORATOR Removal & Installation Discharge A/C system using approved refrigerant recovery/recycling equipment. Pull off rubber trim along engine compartment firewall. Remove wiring and drain hose from expansion tank. Remove expansion tank, and set it aside. DO NOT bend coolant hose. Cut 5 wiring straps along firewall. Remove screws and pull up cover. Remove nut, 2 screws and bolt. Remove wiring. Cut and discard wire straps. Disconnect wiring and gas cylinder rod from left side of glove box. Pull off trim, detach clips and remove glove box. Detach clips and lift out holder. Remove 3 screws and evaporator cover. Remove screw and lift out pipe. Remove expansion valve and evaporator. To install, reverse removal procedure.

[quote="Dave H"]Hello .. thanks for the donation .. much apreciated

Hope this helps

EVAPORATOR
Removal & Installation
Discharge A/C system using approved refrigerant recovery/recycling equipment. Pull off rubber trim along engine compartment firewall. Remove wiring and drain hose from expansion tank. Remove expansion tank, and set it aside. DO NOT bend coolant hose.
Cut 5 wiring straps along firewall. Remove screws and pull up cover. Remove nut, 2 screws and bolt. Remove wiring. Cut and discard wire straps. Disconnect wiring and gas cylinder rod from left side of glove box. Pull off trim, detach clips and remove glove box.
Detach clips and lift out holder. Remove 3 screws and evaporator cover. Remove screw and lift out pipe. Remove expansion valve and evaporator. To install, reverse removal procedure.

quote]

Hi Dave,
Thanks but can you elaborate on removal of gas cylinder rod - you do that from inside the car (behind the glove box)?
My problem is that the pipe holder through the firewall is bolted from outside engine compartment side but not accessible from there. The bolt is allen key and I can touch it through the opening under the wipers between the firewall and the engine compartment.
From inside the car you can see the back of the shaft of this bolt in a clamp holding the alu gas conduits.
Other question:
Do I have to remove the evaporator as such or is it enough to lift out the valve once the piping is loose?
Thanks for clarification
Rgds // Walter

Are you sure that's where the leak is? When you have a leak in the A/C system, dye is a good way to uncover it.

[quote:ff3ffa8adc="Dr. Hagerty"]Are you sure that's where the leak is? When you have a leak in the A/C system, dye is a good way to uncover it.[/quote:ff3ffa8adc]

Yes Sir, has been verified with dye and UV light and shows traces of gas running down the copper pipe of the evaporator.
Apparently need to change O-ring seals to "green" ones to block smaller molecules of new gas components.
So I want to give it a try.