Skip the auto shop - Our mechanics make house calls

Q: Car overheats quickly

asked by on

My car is overheating. I had a block test performed and it was fine. There's no white smoke coming out the tailpipe, no Engine lights, and I changed the spark plugs and they were dry. I also changed the coolant sensor, radiator cap, thermostat, coolant, and I flushed the system. The car is still overheating.

A: Hi there. The Northstar Engine by Cadillac ...

Hi there. The Northstar Engine by Cadillac is notorious for internal leaking from coolant passage to combustion chambers. A block test is not always a certain make or break procedure. The engine would need a wet magna flux test done to ensure the block is not cracked internally. Also, if the cooling system has air or insufficient coolant in it, it will cause the engine to overheat. I’d suggest taking the engine to a certified mechanic to have them inspect your overheating issue.

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 truck wont start. I was driving it earlier and a big cloud of white smoke came out of the exhaust and it completely shut off

Hello and thank you for contacting YourMechanic. White cloud of smoke from the exhaust means that the engine coolant has gotten into the combustion chambers of the engine and is burning the coolant. This could be caused by a blown...

Q: rubber gromments not in transmission and screen on bottom of pan. will those rubbers cause a problem

Any foreign material making it's way through the transmission has the potential to cause problems. There is a chance the last person to service the vehicle did not install the grommets for the screens correctly or not at all and...

Q: Check engine light is on, had it checked out they said thermastat but its not running hot. Do I really need to put in new thermos

Hi there. Unfortunately, without knowing what type of error code caused the check engine light to illuminate, it's difficult for us to give you an accurate recommendation of repair. It might be a good idea to have a professional mobile...

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...
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...
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...