Slowing losing coolant

[coopns]

2002 Grand Caravan 125k. I seem to be slowly losing coolant. I brought the reserved up to min level then 3 weeks later it is about 1 inch below. I drained it this summer - just pulled the plug.

Anything I can look at and or would you recommend any off the shelf products?

 

[Seguino]

A mechanic can pressure test the cooling system to find out where the coolant is going. If it's going into the oil you need to fix ASAP.

 

[beast3300]

If it's a 3.3/3.8L motor, check the bottom of the water pump. The water pumps are usually bad. The pink coolant will leave powdery traces that you can see on the waterpump.

 

[brianl703]

You can get a pressure tester at Autozone. They have a loan-a-tool program: You buy the pressure tester plus any adapters you might need, then they refund your money when you return the pressure tester.

Pump it up and leave the pressure in overnight, then check what leaked the next morning.

I wouldn't do this outside, though--too much chance that a pet could drink the coolant that leaked, if any.

 

[Gary Allan]

Tighten all of your clamps. They won't leak under no pressure, won't leak when hot due to swelling. They can leak in the transitional time where pressure is elevated since localized temp is still low.