Hi everyone,
This is my first post so I’ll try to introduce myself a bit. My name is Eric, from Geneva, Switzerland. I inherited from my late father a 1987 911 coupé a bit more than a year ago .
My father got it second hand in Italy in 2006, it is full matching number, Prussian blue and around 100k miles ( 156k Km). The condition is overall very good, the paint is like new, , no rust, interior has its age but is overall in good shape but I do have a few issue which I try to fix now and then. So far, I managed, with a bit of help from the forum to get the sunroof working again ( the usual issue with the cables that snapped), get rid of the alarm that was installed in the 90s ( very badly done, ugly wiring and a big mess in the electrical system). I still have a few things to do, but my main concern today is related to the ventilation and AC
It seems like the AC has been modified in a number of ways, both electrical and mechanical. The compressor seems to be original ( SEIKO SEIKI) but the condenser blower is not ( SPAL CORREGIO, from Italy) the wiring to the clutch is running alongside the refrigerant hose ( right side under the car), the back radiator is 2 third of the size It should be, the relays for both the condenser blower and the front blower are hanging around next to the fuse box and as it can be seen on the picture, the piece that connect the condenser blower to the pipes has been changed to a very strange piece with 3 outputs instead of the original 2. I don’t know what was the purpose of the modifications, maybe a kind of improvement for the hot Italian weather?
So far, every component seems to be working fine ( fans are ok, relays do their job, the clutch engage when hot-wired). I managed to bet the air temperature knob to move again ( it was completely stuck) but I’m not really sure of how it is supposed to work. What seems to be a temperature probe goes to it and when I check the circuit between the 2 other pins, I get always the same resistance, whatever the position of the knob.
The fluid circuit seems to has some pressure to it, I cannot however tell if it’s ok or not.
Unfortunately, I don’t have any AC, when I turn the switches on, unless the fan running, the clutch is not engaging, and therefore no cool air ( or at least no information about its level of efficiency.
I noticed that the clutch wire is connected to the desiccator and I guess the circuit is let open from there.
Of course, I’d love to get the AC to work again, and as well clean the mess with the wires, relays and ventilation hoses ( the connector piece replaced is not available to buy anymore, if I cannot get a second-hand one, I’ll 3D print it).
What do you think I should do? Change this evaporator first, see if the system is working and work on the rest form there? Or maybe go for a retrofit with a complete cleaning of the system and put new seals and modern gas ( the compressor states “R12” on it).
It would be very kind of you as well if you could send me some pictures of where I should install the relays and how the clutch wire is travelling through the car ( I guess running underneath next to the gas hose is not the best option)
To be a bit more explicit, here are a few pics of the configuration
Looking forward to your help
Eric
