Skip the auto shop - Our mechanics make house calls

Q: overheating 120 minutes (or more) into vehicle operation signs of cyliner head crack?

asked by on

Out of the blue, after great period of service, sudden spikes of heat bleed off enough coolant to cause serious overheating while she's driving. I bring the car home and while I'm driving it the temp gauge is spiking to max even after shut off and coasting... first two thoughts are pump/stat failures, but the initial behavior is indicative of air in the cooling passages inside the cylinder head around the sensor. Is there a simple test possible to eliminate a cracked cylinder head without tearing apart the top end?

My car has 127000 miles.
My car has an automatic transmission.

The cooling system can be pressurized, using test equipment, and if no external leaks appear, yet pressure drops, that is an indication of an internal leak of the sort you are referring to. Such a leak could be from a defective head gasket, crack in the block and so forth. If no leak, external or internal, is found then a routine overheating diagnostic would be performed to pinpoint the cause of the overheating. If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine overheating diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here 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!
  • Home
  • Questions
  • overheating 120 minutes (or more) into vehicle operation signs of cyliner head crack?

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: We have a 1993 for f250 with a 7.3 idi we have now replaced the water pump thermostat radiator and its still over heating what could

Hello. Overheating can be caused by many things. If you have replaced those cooling system components and the issues continue then there is likely a more serious issue with the engine that is causing the overheating. If the engine overheated...

Q: Car won't start in colder weather

Hi There, As you may already know, car engines and batteries typically do not do as well in colder weather for a few reasons. When the engine sits for an extended period of time in cold weather, the oil inside...

Q: do i need a new motor?

Hi there. It is very difficult to tell you for certain that you need a new motor or new vehicle based on reading a description. However, what you're describing is typically associate with an overheating problem or a head gasket...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...