Skip the auto shop - Our mechanics make house calls

Q: My car coolant level goes down even external no leakage found. Second it mileage only 10 kmpl on high way with new spark plugs.

asked by on

My car coolant level goes down even external no leakage found. Second it mileage only 10 kmpl on high way with new spark plugs. Third when I apply hard brake then pedal vibrate up and down and brake the car slow.

My car has 200000 miles.
My car has an automatic transmission.

A: If you are losing coolant with no external ...

If you are losing coolant with no external leak then the head gasket is most likely leaking. The fuel mileage will suffer if you have coolant leaking in one of the cylinders. The brakes will vibrate once the rotors are warped which calls for a replacement. If you decide to get this fixed, consider YourMechanic, as a certified technician can help you pinpoint your coolant leak and make the repairs that are needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: why does my battery keep going dead?

The best way to diagnose the type of issue your Hyundai is having is by beginning with using professional level test equipment to verify that the battery, charging system, and starter are all functioning correctly. These testers are widely...

Q: Transmission went

It would be difficult to say whether or not anyone did anything to cause your transmission to fail, without anything to base a conclusion on either way. It could just be a matter of coincidence. The transmission may have failed...

Q: Antifreeze by back fire wall.

The most common spot for coolant to leak near the firewall is indeed the heater core. The coolant is coming from the evaporator drain hose. The cooling system should be pressurized to verify this leak. Most of the time the...

Related articles

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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.