Howdy folks.
I have searched the archives but haven't found the answer to my question.
Trying to clear the A/C drains on our 40.

How long are the tubes (as measured from the underside )

I've managed to get a thin cable tie stuffed up through the RS about 12in but don't know if I've gotten all the way home, I suspect not, as I didn't get a bath.

Thanks
BB

 

Pull back the carpet either side of the trans tunnel and you'll see a clear plastic tube with a rubber connector. The upper and lower drain tubes separate at that point. You can shove a wire down to clear the lower section, it's about 10-12" to the outside of the car. The usual situation is that the tubes are blocked in the upper section. Poking away with anything won't do too much as there's a screen or something "up there" which blocks your wire or whatever.

So the best method I've found to unblock the upper sections to the evaporator is to run a good length (long enough that the end is outside the car) of tubing connected to the upper section of the hose connection rubber. Connect the other end to either an air line or a can of compressed air and blast away. Remove the air line and in a few moments, water will start to pour out.

Last time I had this symptom over a litre of water was released, so make sure the end of the hose you fitted is not in the footwell.

Happy motoring

Larry

 

Thanks Lawrence.
It's my first time, doing it myself, that is.
I somehow thought it could do it all from below but there's nothing easy about where they exit.
BB

 

I remember years ago that Jaguar issued a TSB for clearing the drain area in the EVAP box. There is a folded sheet metal 'shield' that blocks attempts to use a mechanical means to clear the drain area.

The TSB described using a drill bit with some tape measured to only allow drilling to a certain depth. Any farther and you will puncture the EVAP MATRIX and the entire unit must be removed for repair.

I never tried it but I have placed a short piece of rod into the tube opening and 'TAP/BEND' the sheet metal up a little to allow more debris to flow out the tube.

I probably still have that paper TSB somewhere in my binder of OLD (20 years ago) bulletins but it was never issued as .pdf that I am aware of.

Compressed air is still the safest way to clear debris clogging the drain. It will still collect back in that area eventually but you get draining for a while.

bob gauff

 

Hey Bob - if you can dig out that old TSB, that would be good. I'm sick of blowing out the drains every month or so during summer!

Larry