I have a coolant leak stain on the passenger side of my G35 right inside the splash pan. I had thought it was my radiator but when I replaced the radiator it was the same problem, but here is the funky part, it drips from the radiator or down the radiator. It has to be something above the radiator because it runs down and I know it can't be the radiator because I just replaced it. Anyone have any possible solutions? I have reason to believe that because it's not giving the engine proper coolant amounts it's over heating and burning my oil. I have to replace coolant every 2 weeks and I got an oil change yesterday and the guy said I had no damn oil! 133k miles if it matters. Please help me!

 

With that kinda mileage on your G you need to check your oil at least once a week if not sooner. Over heating, you likely have air in your radiator! Fluid drips, have you checked your overflow tank for leaks?
Gary

 

Check oil at every fill up... Be that guy .

 

Rad cap

 

I always make sure my overflow tank stays at max, and I think it is the cap. Like I said it has to be towards the top because it runs down and drops down the radiator. It fooled me into thinking it was the radiator but when I replaced it I had the same problem. How could it be my cap? I just got this one?

 

I got 3 before I finally found one that worked. I don't know what it is with these damn things.

One from O'Reilly: didn't work
One from Nissan ($25!): didn't work
Duralast from auto zone: good to go

I pressure tested them before moving on to the next one. It was the cap every time.

 

I have the duralast one. :'(
Post picture for verification.