99 DODGE 1500 WHEN I START MY TRUCK I CAN HEAR THE HEATER CORE FILL WITH ANTIFREEZE. CHECKED OVER FLOW AND RADIATOR TO MAKE SURE THEY ARE FULL.
WHAT DO YOU THINK?
THANKS WHITE GHOST

 

you have air in your system. from cold, remove the cap and turn the heater to full hot then run it until the t-stat opens. make sure you top off the radiator as needed. also it helps to have the front end a little higher when doing this to allow the air to escape.

also i'd suggest making sure you use distilled water and not tap.

 

i'll pass that on to him.....thanks

 

whats the diffrence in the water? should why should it need distiled because i seem to have this problem but it's only once in a while?