2005 Buick La Crosse Sloshing noises

YOIJPC

MEMBER
2005 BUICK LA CROSSE
6 CYL
2WD
AUTOMATIC
67,000 MILES

I have a strange noise that is a sloshing of water or liquids that is very noticeable when accelerating, decelerating or sharp turns. Basically there is wave created when you accelerate the vehicle and no one can seem to find where it is coming from.

I have had someone say that they thought it was air pockets in the cooling system which I can imagine would cause such a large rush of water that it would feel being on a waterbed. They have burped the system and that hasn't solved the problem. Someone mentioned the AC drainplugs being clogged and that hasn't seemed to be it either. Is it possible that water is building up in the firewall?

I don't believe that this is exclusive to my car because my brother has an '03 Chevy Impala that is doing the same thing.

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Chances are the heater core is what you are hearing. Make sure the coolant level is full. When filling it, make sure the heater is on.

Let me know if it helps. Also, if there isn't a bleeder on the t-stat housing, loosten the return hose from the heater core to bleed it.