Coolent leaking but not overheating

If I were you, just tighten it, and then check to see if the leak is gone. 90% of the time, tightening will solve the problem. If not, you’ll need to replace the hose. When tightening the clamps, do not tighten them too hard or you can break the plastic reservoir and radiator.

You’ll need to drain a few gallons to remove the coolant hose without spilling anything. The hose on the radiator, I’m not sure.

Also, it’s possible the reservoir cap is still good, and whoever tightened the cap accidentally closed it incorrectly. The cap needs to be completely flat and even when tightening. This is because the reservoir is made out of plastic.

 

Your system is being pressured by the engine, you could have a leaky head gasket.

Edit - replace the radiator cap first.

Remove some of the coolant as mentioned.

If the dealer did the work, bring it back to them to have them check it out, there should be no charge for it. They should have a coolant system pressure gage they can use to see what pressures are in the system.

 

Ridgeline said it best, have the Dealer pressure test the system. This will check for leaks, making sure it’s holding pressure. Then the second part of the test, they can start it up,and watch guage to see if it’s building excess pressure. If so, there’s a problem, maybe a costly one, involving a new head gasket, head, maybe even a liner issue. Probably not, with such low miles, but the best way to know, and stop guessing, is to have it tested. They can even test caps for you. If you’re feeling ambitious, go to a big chain auto parts store, they’ll rent you the kit for free. Utube, for more info. It’s pretty simple stuff.

 

Hoses will develope a cold water leak as when engine is shut down and cold. Is this what this is? If you haven't done this, I would check after shut down in cold temperature for a long while. For telltale drops.Tighten clamp as already stated. I have even added another clamp, if you have room, and its actually gonna tighten on the surface under the hose. The cap you have already replaced. Then after engine has worked hard and heated up, like on a long upgrade, pop the hood asap and see if the leaks are dripping then. Where does your overflow go. Or that probably is the overflow tank. Saying this I remember a truck I had that (older no overflow tank) would burp out excess coolant especially in hot weather until it found its normal coolant level range. May save a trip to the shop. If none of this works then to the shop where work was done as someone said.