Skip the auto shop - Our mechanics make house calls

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 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・Fair and transparent pricing

Get a quote

What others are asking

Q: My car will not rev passed 3 rpm not sure what the problem is engin and tranny are good need help

The engine may have a bad distributor causing low power. If you have replaced the fuel filter and still get poor acceleration then check the fuel pressure and if it is normal then remove distributor cap and check for oil...

Q: Oil capacity

Hi There, I would not recommend filling the engine with more than the manufacturer's recommended oil specifications, which is 4.5 quarts for your particular make and model. Your engine's optimal maximum oil level is determined by filling up to a...

Q: My car just stopped one day and it doesnt move at all and wont lock into gear

Hey there. The first thing to check is the transmission fluid level. All of the shift activity on this gearbox utilizes hydraulic pressure under solenoid control. Another possibility is a failed pump drive (from the torque convertor). If this is...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
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.