Hi guys, so a couple weeks ago I asked about the coolant in my 2012 G37 Sedan with 51xxx miles on it, and the reservoir was completely empty at that moment. I filled it up to the max line on 12/16/2016. Now, as of today, 1/15/2018, the reservoir is about to be empty again. I saw the coolant at the bottom of my car where we place the floor jack to lift the front of the car up. The leak seems to come from the driver side. What do you guys think that cause the problem? I am scared to death that I have blow head gasket in my engine ==". Thank you.

 

 

Remove the lower engine cover and go to town with a flash light. Likely leaking from a hose clamp or a water pipe.

 

Thanks guys. I will lift the front of the car up again to double check to see where the the leak comes from.

 

Hopefully it's not coming from the weep hole in the water pump. G/L

 

Hopefully it's not the case, but I had a similar issue with mine and it ended up being a bad water pump.

Let us know how it goes.

https://www.myg37.com/forums/g37-sed...ml#post4143573

 

Hi guys, so I just did the blow head gasket test with the Combustion Leak Detector at the radiator cap hole for 2 times. The 1st time was after the car had been running for 3 mins, and the liquid stayed blue. I then waited for another 2 mins and did the test again. The liquid still stayed blue, but it started to sucked in the coolant now because the car was warm enough, so I had to stop. I guess I am safe to say that I don't have the "blow head gasket" for now, but now I am scared that I have a bad water pump. If that is the case, then I guess I will have to suck it up and bring it to a mechanic to a complete tune up ==". My pocket is hurting right now

1st time:

2nd time:

 

Have you been under the car, engine cover removed to examine? It could be a water pump but it could also be a weak hose clamp..

 

The coolant level after 5 mins total, and this coolant is GREEN. Anyway, I add the Nissan Blue in for both times =.=



As you can see, the coolant reservoir looked like it was empty, but it actually had a little bit left over from the 1st time which is a couple weeks ago LOL

 

It is too late and cold right now, so I can't do it yet. I will have to wait until this Saturday to get under the car to see where the leak comes from

 

I have a feeling it's thru the weep hole that blnewt mentioned. Definitely look the sides of the block see if you can see dried coolant streaks.

 

A good place to check.

https://www.myg37.com/forums/engine-...-location.html