heater not working water coolant level drops

[Mike Hancock]

The heater is not reaching full temperature and there is a gurgling noise coming from it. Water coolant level drops but only needs approx 1 pint to top up. I have had radiator replaced and system drained and bled to refill. I just did a long journey and the car didn't overheat. Can't see any obvious leaks. Any ideas please?

[ilikerice]

sounds to me air traped in the heater core.

Suggestion:
-drive up on a couple ramps or a steep incline.
-take off radiator cap
-turn car on, heater on high
-let run for a while (5-15mins)
-watch coolant see if it drop or air bubbles form.

I would invest in one of these:
http://www.google.com/products/catalog?q=coolant+funnel&hl=en&safe=active&um=1&ie=UTF-8&tbm=shop&cid=16445349217148080464&sa=X&ei=4ImyTunJBNKatweYlajIAw&ved=0CGAQ8wIwAA#

They help coolant refills so much and easy to watch the air bubble escape.

[Mike Hancock]

Many thanks Derrick, I have tried this and some bubbles came out but I probably need a steeper gradient. It sounds like it could be the problem - pity I just replaced the radiator!

[TOLMACH]

Level dropping is normal after you replaced the radiator.. just wait and keep adding coolant

[ilikerice]

Yea, no prob. Take Tolmach in consideration also. Just keep driving it around with the heater on high and the bubbles will eventually makes thier way to the radiator.