240 Aircon repair

GreenGL

Now that my 240 is back up and running, it's time to tackle an issue that has been there for a good while, non working air-con.

The car is an 88' model, I've established that the electricals look good right up until the compressor itself.

The compressor looks like a Nippon-Denso. The magnet clutch is faulty, so I am going to get the unit replaced, I've read a number of 240 owners have had good results from the Sanden 4664.

After I get any remaining R134 evacuated from the system, is it a relatively straight forward job to swap the compressors at home, then take the car to a workshop to get it all regassed?

Major Ledfoot

In your place, I'd be tempted to find a replacement 4664 compressor at a sensible price, then take it to a shop to have the system vacuumed down (and the old r134a removed) but also get them to fit the replacement compressor, and to pressure test and charge the system. This is presuming of course your TX valve has been set for 134a. If they fit the unit and there are leaks, it's on them to sort it.

You may also need to replace the receiver/ dryer if the system has been open to air for a while, but YMMV.

jamesinc

I'd replace the dryer just to be safe either way.

With respect to fitment, aside from safe disposal of the refrigerant as @Major Ledfoot mentioned, the compressor is fairly easy to replace.

One thing to note is that you will want to replace the o-rings on the fittings, if you get an assortment of high quality Viton o-rings this should cover you, but you can also buy them from Volvo by part number. Don't get the cheap eBay Viton o-ring assortments, they work fine in some applications but they tear up easily and I've had trouble with them in A/C systems.

One last tip is to dress the o-rings with Nylog Blue which may seem pricey but costs a lot less than regassing your system!

GreenGL

Thanks guys.

Is the sanden going to be comparable to a jayair compressor, or is it noticeably better?