I've topped it off twice and dealer once. Today I finally brought it in because I cant even see the level in the tank. Dealership said they did a pressure test, bleed and nothing turned up... and even said never check the coolant level again??? Granted the level of road, temp etc would make a difference but having topped it off so many times and seeing it below min is not normal right? There's no coolant puddles or white smoke... But I'm suspecting a little leak somewhere(over a 2 month peroid) Any ideas?

 

If it's leaking wouldn't it show on the ground where u always park? hmm sorry that ur having this problem..

 

Typically, if you can verify you are definitely losing fluid and the pressure test turns up nothing, the fix is the radiator cap since it's the only item not tested during a pressure check.

 

I found my daughter's '07 G35 Sport was leaking at the lower radiator hose clamp on the driver's side. The dealer never saw it and I found it when I was changing her oil. The clamps they use are useless and will leak easily under pressure. They had to replace the hose and clamp, then damaged the plastic cover protecting the under neat engine compartment , then had to replace that.

 

He said it was pressure tested and nothing was found..

 

good idea... i had that replaced before i took it home today... I'll see in a month how that went. thanks.

Would the pressure test confirm if the gasket has a tiny leak?

 

Absolutely. That's the purpose of the pressure test. It either holds pressure or it doesn't. A tiny leak would still show up if the test is done properly and held long enough. The seal on your radiator cap may have been nicked on installation or during some late service or refill. Either way, it's a simple, harmless, inexpensive fix. If it turns out to ultimately be something else, you're out less than $20 but you've at least eliminated that as a possible cause.