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?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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: Is the 2004 Volvo S60 a good car

In evaluating the wisdom of buying a particular model of car (used or new), consult the database of the National Highway Traffic Safety Administration, NHTSA. The NHTSA database contains year, make and model specific consumer complaints, official recalls and factory...

Q: Constant oil leak.

Hi Juan: Yes, if you simply use the on-line portal to request an oil leak diagnostic a certified Mechanic, dispatched by YourMechanic right to your location, can let you know of your repair options and costs. If you have further...

Q: Whole radio stops and shuts off at random

Hello! Thank you for writing in with this question. Many Toyota vehicles have been affected with similar issues. Oftentimes, this problem is caused by a ground issue in the faceplate of the radio. Toyota offers an updated factory radio. You...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.