Hey y'all, I discovered a pretty bad coolant leak a couple days ago when I was leaving the parking lot and have been searching everywhere in forums etc. Leak started from one day to the other and the car wasn't overheating or anything. I've been seeing numerous things it coul be be such as old horses, old clamps or possibly the water pump. It does it seem like its leaking at the end of a small hose where a clamp is so maybe it's that? I just purchased the car a couple weeks ago in which the previous owner had the water pump replaced along with valve cover gaskets, gallery gaskets and the crank seal this past December along with the paperwork.

I'm hoping its something like a loose clamp or hose but I'll be taking car into the shop within a few days to make sure. The car was a low on coolant in the radiator and reservoir when checked. I tried to take a couple of pictures underneath the car around the drivers side where the leak is.

 

Buy a telescoping inspection mirror and get a good flashlight, you can see every square centimeter of the car with one and it's very easy to find leaks. All auto parts houses should have inspection mirrors in stock, costs about $5.

EDIT: You shine the flashlight at the mirror, the light reflects off the mirror up onto what you're looking at in the mirror. Very easy to use.

 

Great I'll get one today. Thanks for the tip.

 

Most likely it's the heater hose connector or connector with the bleed valve. On my 07 G35X the connector on the passenger side disintegrated and fell apart. It's just a plastic straight connector. The driver side heater hose has the connector with the bleed valve. If you take off the engine cover, you can see both from the top. They are between the fire wall and the engine. Real pain to replace. Not much room to work with.

 

Do a pressure test and you will most likely clearly spot where the leak is.

 

I checked both of them and they looked in pretty good shape as if they've been replaced not too long ago. I was able to pinpoint which hose its leaking from but I'm not sure what's the best way to replace it as it's a pretty small hose and not a lot of room to work with. Its below the drive side intake and it's a hose that is no more than 3 or 4 inches long.

 

I tried but my closest auto parts store had already loaned it out but I was able to loan an inspection camera that helped find the small hose that's leaking.

 

The leak is located at the other end of this hose where the clamp is located. Does anyone know where this leads too and the best way to replaced it?

 

Looks like part 24, if it's leaking from the front of the hose like the clamp just isn't tight enough then use a pair of angle head needle nose pliers to move the existing clamp further down onto the hose (past the metal nipple/barb that it's hooked onto) then put a worm drive screw clamp on instead. If you unscrew a worm drive clamp all the way it comes apart so you can fit it over an existing hose.

 

Thanks for the diagram! Yeah unfortunately the leak is at the other end of the hose so it's pretty difficult to reach the clamp. I was barely able to get an inspection mirror there through the crevices. I'm not sure if I'll have to remove several other things to clear some room.