To the point---> Is there a sensor with a longer probe in the Mazda or Ford inventory for the radiator coolant level sensor that screws into the top of the stock FB radiator? I need one with the same thread pitch and diameter to screw into the hole, but the sensor "pin" needs to be about 1/2" longer than stock.

The PN in the Victoria British/Black Dragon catalog seem to indicate it's the same piece from '79 - '92.....how is that possible?

So who's got the truly hard core parts swapping mojo that can help here?

 

Why does it need to have a longer probe? Isn't stock good enough?

Mazdatrix also sells just one sensor for that long of a run because the stock ones are either no longer available or are too expensive and the cheaper one works just as well.

Is that hard core enough for you?

 

NO!...despite your 20B, you have no mojo!

I had a custom aluminum radiator made that utilizes all the stock factory sensors and radiator hoses. Problem is, they decided the top of their radiator was too thin to simply tap and thread for the coolant sensor, so they welded a 3/8" plate on top of the top tank and then tapped and threaded that. The aluminum radiator tank skin is also thicker than the stock FB sheetmetal radiator tank skin, so the tip of the sensor's probe is sitting up too high...just a tiny loss of water or air bubble passing by, for unknown reasons, has the inside alarm pinging like mad!

So, WHO'S GOT THAT MAD KNOWLEDGE?? Or should I just get a V8??

 

Since the threaded bit is a separate plate anyhow, couldn't they have cut an oversize hole in the aluminium top tank, sunk a 3/8" piece into the hole so it's flush, and welded the two together with an overplate?

Or, simpler, just weld a threaded nut of the appropriate size on the inside of the top tank before assembly?

 

The threaded nut idea was how I thought they were going to do it...I was quite surprised to see the thick plate solution. It's on the car and I've got a small leak on the bottom "spigot" outlet since I'm just using the plastic plug that came with the car...I haven't had a chance to go to a parts store to see what kind of spouts are available yet. Just that little drip-drip-drip over an hour's running time is enough to lower the coolant level to trip the sensor..

I'm thinking of grinding the plate down to lower the sensor if I can't get one with a longer tip or figure an artificial way to extend that probe.