Firstly let me say this is not my idea, I found it whilst surfing the net, hard as I try I cannot find the site again, all I can remember is that it was a car related forum, maybe it was this one ???
The electronic module was purchased from Ebay, it has two wires for the probe but you only need to use one as the water acts as an earth, simple trial and error to find correct one.
http://www.ebay.co.uk/itm/1706255384...84.m1423.l2649
http://i56.photobucket.com/albums/g187/ ... orebay.jpg
The original thread I found showed a probe being made by drilling the expansion tank and inserting a bolt, I didn't want to drill the tank so I fabricated a probe from a piece of old brass carpet joiner, a spade terminal fits nicely if you cutt it right.
http://i56.photobucket.com/albums/g187/ ... CF0145.jpg
I fitted the probe between the top hose and the radiator outlet elbow, the elbow has a ridge where the hose fits over it, I filed away a small section of the ridge to allow the probe to fit flush, when fitting hose I used a good dollop of silicon sealer and replace the original spring clip with a jubilee clip.
http://i56.photobucket.com/albums/g187/ ... CF0146.jpg
I follwed the bonnet release cable route for the probe wire and took a 12v supply from the rear of the ignition switch with an inline fuse inserted.
I have also fitted a push to break switch in the probe wire so I can test the system, you can just see it in the picture, I have located it in the lower half of the steering column cover.
I also drilled a hole behind the switch and glued the buzzer on the inside, be careful not to get glue in the buzzer hole.
http://i56.photobucket.com/albums/g187/ ... CF0148.jpg
I have given the car a good run and no signs of a leak from the top hose.
The buzzer is loud enough but if required the seller will fit an LED (Light Emitting Diode) for a small extra cost.
The electronic module was purchased from Ebay, it has two wires for the probe but you only need to use one as the water acts as an earth, simple trial and error to find correct one.
http://www.ebay.co.uk/itm/1706255384...84.m1423.l2649
http://i56.photobucket.com/albums/g187/ ... orebay.jpg
The original thread I found showed a probe being made by drilling the expansion tank and inserting a bolt, I didn't want to drill the tank so I fabricated a probe from a piece of old brass carpet joiner, a spade terminal fits nicely if you cutt it right.
http://i56.photobucket.com/albums/g187/ ... CF0145.jpg
I fitted the probe between the top hose and the radiator outlet elbow, the elbow has a ridge where the hose fits over it, I filed away a small section of the ridge to allow the probe to fit flush, when fitting hose I used a good dollop of silicon sealer and replace the original spring clip with a jubilee clip.
http://i56.photobucket.com/albums/g187/ ... CF0146.jpg
I follwed the bonnet release cable route for the probe wire and took a 12v supply from the rear of the ignition switch with an inline fuse inserted.
I have also fitted a push to break switch in the probe wire so I can test the system, you can just see it in the picture, I have located it in the lower half of the steering column cover.
I also drilled a hole behind the switch and glued the buzzer on the inside, be careful not to get glue in the buzzer hole.
http://i56.photobucket.com/albums/g187/ ... CF0148.jpg
I have given the car a good run and no signs of a leak from the top hose.
The buzzer is loud enough but if required the seller will fit an LED (Light Emitting Diode) for a small extra cost.
