I recently got a coolant flush, and have noticed the coolant is going down every couple of weeks, if anyone knows what could cause it would be greatly appreciated.

Thank you.

 

If you don't have any obvious puddles in the driveway or coolant in the oil when you check the oil level, then you've probably got a leak that only happens when the cooling system is under pressure. There are tools to test for this without the engine running. It will pressurize the cooling system with a hand pump and any leaks will show up where you can see them.

 

lemmie guess.... 2.7L?
Mine hasn't done it, but I've heard of them leaking into the oil internally. Hope that isn't it.

 

Yes, it is a 2.7L. I have checked the oil and have not noticed any issues with it, i would assume if i am losing the reserve everyday the oil may increase?

 

Your oil would look like coffee with cream in it, a light tan color, not dark like used oil.

Mike

 

Ya, the oil color is normal, but under the cap is a tan residue, which the dealer said is normal condensation... Thats what im hoping, they say its from short trips. The coolant only goes down when driving and there are not puddles under the car when parked.

 

If it is only going down when the car is driven, then you need to see if you can get a cooling system pressure test done. When I had a similar issue, this test pressurized the cooling system to 15 psi without the engine running or having to heat it. Since it only leaked under pressure, the leak was really easy to find. Just look for the coolant stream.