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I have seen a few oil pressure and coolant sensors leak from the crimp area.. Some coolant sensors are so slick that they leak up through the terminals and the moisture migrates up through the wiring and into the computer itself. A few years back it was a common problem until they changed something in the manufacture to prevent that.
The codes kept saying the sensors were shorted when it was the coolant raising heck up up the computer. That is probably why I felt the sensor was the problem, but as you stated the possibility of the gasket leaking is also valid. Just about everybody knows a pressure test is the recommended way to confirm something like this and I jumped the gun. Thanks for reminding me.
I have a 2004 Hyundai XG350L that has a coolant leak. I know it's not the radiator or a head gasket or anything like that. It leaks from a small part of the right side of the top of the engine. It looks like it goes into the block(screws in?), and has an electrical connection, so maybe a temp sensor? It leaks badly and constantly, and even when I'm filling it up when the car isn't running!!
hi did you ever find out what the problem is my hyundai doing the same thing
OK, this is the reason I asked.
What should be done is to thoroughly clean and dry the area and apply pressure to the cooling system with a cooling system pressure tester.
Then watch for where the coolant leaks out. That way you do the work once and do it right. Right now it appears we are not sure of EXACTLY where the coolant is leaking.
This is what a good shop would do.
Not active on this site, but I'm in the middle of this same job for a friend of mine and thought I'd share. My leak was actually coming from the the water outlet pipe on the top of the thermostat housing. It's an elbow like fitting with two bolt holes that the upper radiator hose connects too. I changed the gasket, and leak persists, about to put a new upper rad hose on and discovered some serious corrosion on the fitting. Corrosion so bad the bulb on the fitting was ineffective and causing a good hose to leak under pressure. This was tricky as the leak would come and go with the thermostat opening and closing and car being cold or hot, but it created a serious puddle on top of the tranny and uncaught would lead to overheating. Hope this helps. 05 GX350 3.5
05-30-2019, 03:00 PM
