Q: Can a blown head gasket cause a map controlled thermostat not to open?

asked by on May 21, 2017

Can a blown head gasket cause my map controlled thermostat not to open? The reason i ask is because a friend askd if i have a blown head gasket due to the coolant overfilling my expansion tank .....my old thermostat dosnt open and its causing the coolant to gurgle till it over flows but i dont let it get to that point..... i bought a new thermostat from a chevy dealership and i put it in 200 degree hot water and it still dosnt open..i installed it anyway to see if it would open and I am 100% sure its not opening because when it reaches operating temp the bottom radiator hose stays cold Any help?

Hi there. Although a blown head gasket can cause multiple systems to fail throughout the vehicle, is less than likely that it would impact the operation of the thermostat on the radiator. However, it is quite possible that when the original overheating issue that likely caused the head gasket failure occurred, several electrical harnesses or sensors that control and monitor these components may have been damaged. Coolant can overflow for many reasons, but typically it’s due to having coolant that is not thinned down to the recommended 50/50 ratio of coolant to distilled water when adding coolant to the radiator.

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

What others are asking

Check engine light on and the engine is idling really bad.

The check engine light code P0496 leads to the evaporative charcoal canister purge valve solenoid may not be functioning properly. Check the purge valve solenoid on the charcoal canister and see if there is a smell of gas. If so,...

Jerking reaction when accelerating

This may be a couple of different things. When a transmission is low on fluid, this can cause a jerking reaction as you describe. Automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required,...

I have a 1996 chevy k1500 and I just put a new motor in it and it will start and run and idle amazing but has no power in drive

Check to see if ignition timing is advancing per the specifications in the factory service manual as you rev the engine. Measure fuel pump pressure. Check throttle position sensor, oxygen sensors, vacuum leaks, ignition system malfunctions, bad valve timing if...

engine power reduced

Hello, thank you for writing in. The diagnostic code was related to the transmission shift circuit. The computer has detected an issue, and that likely the reason for reduced power. If the transmission shifts too early, your vehicle will bog...

What does the StabiliTrack off light mean?

The StabiliTrack off light is located on your instrument cluster. It comes on when the StabiliTrack system has been manually turned off. When the StabiliTrack off light illuminates, then the traction control system (TCS) is also turned off. The TCS...

How do I adjust the volume in the infotainment system?

Adjusting the volume in the infotainment system is very easy. Simply rotate the VOL knob until you reach your volume preference. The volume will increase when the knob is rotated clockwise, and decrease when the knob is rotated counterclockwise.

2012 chevy cruze lt 1.4 valve cover vacuum leak. waiting on parts in the mail.

It is possible to temporarily seal air (vacuum leaks). Any method that best creates a seal can be used. In particular, RTV sealant which is flowable can be used to seal a non moving crack so long as the surface...

Replacing driver's seat

Hi there, thanks for writing in. You can use the same bucket seat out of any GM truck whether it is a GMC or Chevrolet from the years of late 1989 all of the way up to 1998. This can...

Press the gas and my rpm go up to 4000

Hi Sammi. Thanks for sending your question today. I'm not quite certain what issue you're having with the Cobalt. If you press the throttle and the car does not move, but the RPM goes to 4,000 RPM, then you likely...

Related articles

The Best Used Cars to Buy If You’re Single
When When you’re buying a vehicle that needs to meet the requirements of all kinds of passengers the process can prove to be rather tricky. However, if you happen to be single, you’re the one in control, and your list...
A Buyer’s Guide to the 2012 Chevrolet Impala
A A true classic, the 2012 Chevrolet Impala may not have all of the latest high-tech features of other sedans on the market, but it is a tried-and-true model with lots of room, plenty of comfortable features, and a large...
A Buyer’s Guide to the 2011 Cadillac DTS
The The 2011 Cadillac DTS is a full-size sedan that offers the comfort and luxury you expect from this automaker. It manages to combine a comfortable ride with tremendous amounts of cargo capacity in the trunk, although it isn’t without...