2004 Honda CRV

Hi lreddy,

Thank you for the donation.

If you are losing coolant both at recovery tank and radiator, there is a leakage somewhere and if it is a mini leak, pressure testing might not be conclusive.

Reason is that the leak might happen only when hot ot when cold. Usual areas for leaks would be hose joints, water pump, radiator cap and radiator drain plug.

When the radiator drain plug leaks, it is always difficult to diagnose and often missed out.

One way of sourcing for leaks is to note the presence of coolant.

we have tested hose joints, water pump, radiator cap and radiator drain plug. But we didn't find anything. It takes around 2000 miles before it gets evaporated.

If the recovery tank is drying up, definitely there is a leak somewhere. After 2000 miles indicates the leak is very minute and normal pressure test is not going to show anything.

The only way is to look out for coolant stain stain marks. Use a mist sprayer to spray at joints to get them slightly damp and presence of coolant would show up by the stains. Do it only when engine is cold and do not get electrical components overly wet.