Skip the auto shop - Our mechanics make house calls

Q: Overheating

asked by on

2008 Rx350 - coolant is draining after I fill it up. No huge puddle to indicate leakage. Car is running very hot within moments of starting car up almost pushing a notch away from the red zone. Squealing noise is being emitted but very faintly. Also I smell a sweet burnt syrup smell that is faint. 122,000 miles

My car has 9999999 miles.
My car has an automatic transmission.

Hi there. This is a concern I’ve experienced many times while employed at a Lexus dealer. The low coolant level is contributing to the high operating temperature and is a direct result of a coolant leak. The smell you are experiencing is the coolant leaking to the outside of the engine and being burned off by the high temperature.

The squealing noise may be coolant leaking from the water pump onto the serpentine belt. A cooling system pressure test would be the best bet to locate the leak/leaks. If you are not seeing a puddle, the leak may be at what is called the engine block valley plate; located under the intake manifold and very difficult to see. However, I think there may also be a water pump leak as well causing the noise. The valley plate will leak into the middle of the engine block where the coolant will sit until it either burns off or overflows to the ground. YourMechanic has several available technicians to assist you with a coolant leak inspections, and water pump replacement (if needed), and can provide an estimate and direction for proper repair.

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

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: Do I need to replace the engine?

If the upper part of the engine is noisey then you may have lack of oil getting to the camshaft and the lifters. You may need to have the oil pressure checked to see if the engine is getting oil...

Q: Dead Car

The smoking from the cables may very well have been caused by having the cables hooked up backwards. You may want to have your charging system diagnosed by a professional from YourMechanic to be sure your alternator and battery are...

Q: Have a 2006 Lexus IS350 with a code of P0420 saying catalyst System Efficiency Below Threshold Bank 1

Hi Phoebe. Thanks for contacting us today. When the oxygen sensors have readings that are similar to each other, it is an indication that the catalytic converter is not working as intended. If the voltage of the downstream oxygen sensor...

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...