Q: I have to fill my radiator and reserve tank almost every week.

asked by on

I had my radiator, timing belt, and water pump all replaced in 2016. I replaced the thermostat and spark plugs in 2016. I find that my car leaks coolant, and I have to fill my radiator on an almost weekly basis. Further, I have noticed that at times, my car hits 4,500 rpm's before shifting gears. I am at a loss as to what could be causing the leaks. Any input you might have is greatly appreciated.

My car has 150000 miles.
My car has an automatic transmission.

Hi there. If the leaks to the cooling system are visible on the ground, then there is an external leak on the cooling system. Check all of the hose clamps to the radiator and water pump. Also, look to see if any of the coolant hoses are damaged causing the leak. If you cannot see any visible leak, then check the engine oil and the transmission oil. If the engine oil has coolant in it, then the head gasket may be damaged causing the coolant to enter the oil galleries. If the transmission oil has coolant in it, then the new or the older radiator may have been leaking inside over to the transmission cooler tanks. I recommend seeking out a professional, such as one from Your Mechanic, to help you if you are unable to find the leaks.

For the transmission shifting at 4500 rpm’s, the output shaft speed sensor (also know as the vehicle speed sensor VSS) has a loss of power or is damaged. Check to see if the harness is hooked up to the VSS and see if there is any broken or frayed wires. If you need further assistance with your transmission shifting at a high rpm, then seek out a professional, such as one from Your Mechanic, to help you.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. I have to fill my radiator and reserve tank almost every week.

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: New battery, but have to keep jumping car

Hi There, It sounds like you may have a faulty alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator....

Q: Key not unlocking car.

If the lock cylinder rotates when the key is inserted but does not unlock, then either the linkage to the latch assembly has become disconnected or the latch is bad. In this case the door panel will need to be...

Q: I've had a lil leak for a 2 months now my car won't start

Check the engine oil level. If the level is really low, there is a possibility of engine damage but seizure would be extreme. To check for a seized engine, you can simply attempt to turn the engine over by hand...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...