Antifreeze smell...Where to start looking ?

[Nufy]

Noticing a faint smell of coolant when my sons TJ is running.
Both inside and out.  Rad levels of coolant have dropped as well over time but I can't say how much.

I assume it was full when I bought it last fall and a few weeks back I had to add about 1-2 litres to the rad to top up the level to the rad cap.

No visible leaks anywhere, no pooling etc...

Just wondering where are the common sources of leaks for a 2005 TJ 4.0 L 6 Cylinder.

Thanks.

[Vinman]

Check the heater core if there’s no visible leaks outside

[MattMan]

I concur with Vince...

[Kanueh]

If no visible leaks are found either get it pressure tested and/or get a head gasket leak detector. Basically tests the coolant for exhaust.

[Nufy]

No coolant in the oil as per the last oil change a few months ago...

Seems to be more from the engine bay than the interior...

Might run it up to temp tonight and take a flashlight in the dark to see if I can see anything.

[Kanueh]

Do you see any white smoke on startup or while running from the exhaust?

[Nufy]

No smoke in exhaust on start-up.

[Kanueh]

Visual look for leaks, if none found pressure test it.

[Nufy]

Found a little on the bottom tray / support of the radiator.

Tried a bottle of stop-leak for the rad but didn't work.

Where a good place to get a new rad ??