Q: I'm losing coolant, but I don't know from where

asked by on

My van is losing coolant, but I can't figure out from where. The timing belt and water pump were changed around 100,000 miles. I usually change the oil every 5000 miles or so. I waited a little longer than usual on this - almost 7000 miles. Sometime between the last oil change and this one, my coolant reservoir went from the halfway mark all the way down to the "add coolant" line. It was at the halfway mark every since the timing belt change, and until now the level as never budged. There aren't any leaks that I can see. Two oil changes back, I had an oil analysis done, and I was told there were some indications of possible coolant contamination in my oil. However, the brand of oil I was using sometimes has those particles in it, and the percentage is so low it's not supposed to be anything to worry about. I'm having the oil tested again, but are there any other common areas I might lose coolant that wouldn't be very visible?

The loss of coolant can be determined with a couple tests. The coolant overflow bottle can have a combustion tester put on it. This will allow you to see if there is any combustion getting into the coolant, indicating a possible head gasket leak. The system can also be pressure tested to see if any coolant leaks are found or if the system’s pressure goes down, indicating a leak in the cylinder head or an external leak.

If you need assistance with these tests, a certified technician will gladly help you find the source of your coolant leak.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I'm losing coolant, but I don't know from where

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car is 04 325ci, 205k miles, never abused. While driving, especially when going up the hills, the engine suddenly stalls and l

EML is for Engine Management. That indicates a problem detected in the Engine control system. Brake and DSC are telling you there is an issue with the Dynamic Stability Control which is integral with the Brake system. There are likely...

Q: Q: Water leaking into car

The most common water leak I have seen on this vehicle is the sunroof drains. When they are clogged, the water will get into the car. If it does not have a sunroof then the water usually comes in from...

Q: Oil leaking engine won't hold oil but car starts

As you know, an oil leak can range from somewhat minor to very serious depending on the location of the leak and how quickly it is leaking. I would recommend not starting the car at all until getting this leak...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...