I have a 2011 Chevrolet impala and my coolant in the reservoir is evaporating within a months time of being filled. What could be the problem? Water pump?

SOURCE: 2000 Sunfire coolant problem. Engine overheating,

ok, its time for a radiator flush. there is major sludge in the internals of this radiator. Make sure the thermostat is in the correct position as well. I've seen many cars come into my shop with the thermostat inserted backwards.

SOURCE: 1999 GMC Jimmy Running Hot w/ Engine coolant reservoir empty

Hi
The problem is most likely 90% head gaskets but could be intake manifold gasket leaking too. Intake gasket has to be checked when intake is removed. Might find problem there if not continue and remove heads. Bars Leak will not work.

SOURCE: '02 Audi A4 is leaking coolant

I have an A4 quattro 2003 and have the same problem. Found hose at the top end of engine at the back close to the battery housing was leaking. Terribly awkward job to replace , been quoted £200.

Greg Bernett

• 2993 Answers
• Posted on Oct 22, 2009

SOURCE: how to replace a water pump on a 2002 chevrolet

Right tools, patience, and patience.....

Here is the procedures for the 3.5L engine (you didn't post your size):


3.5L Engine

1. Before servicing the vehicle, refer to the Precautions Section.
   
2. Partially drain the cooling system.
   
3. Remove or disconnect the following:
   
   • Surge tank outlet hose
     
   • Drive belt
     
   • Idler pulley
     
   • Water pump pulley
     
   
   NOTE The water pump is attached to the engine with both long and short bolts, be sure to note their locations.
   
   
   • Water pump
     

1. Install or connect the following:
   
   • Water pump using a new gasket and torque the bolts to 124 inch lbs. (14 Nm)
     
   • Water pump pulley and torque the bolts to 106 inch lbs. (12 Nm)
     
   • Idler pulley and torque the bolt to 37 ft. lbs. (50 Nm)
     
   • Drive belt
     
   • Surge tank hose
     
2. Refill the cooling system.
   
3. Start the engine and check for leaks.
   

SOURCE: I have considerable steam coming

It may be the radiator cap itself, but is most likely a crack that has formed around of near the radiator, causing steam to exit from this area. It seems like it is a small leak, otherwise the coolant loss would not be so gradual. Radiator replacement will most likely solve this problem after the radiator is inspected and a crack is found. I do not recommend the use of Stop leak to correct leaking radiators, in the long run, they do more harm than good.

Testimonial: "Thanks very much for the detailed and informative response. I will follow up on your suggestions."