Boiling Coolant

[d3m0]

Okay, GSX boosting 15.
I was driving, not really that hard, shifting at like 4,500.
When I stopped, I popped my hood and coolant started SPEWING out of my coolant resoivor overflow. Now, does this mean my thermostat is bad or my headgasket is blown?
it was boiling, then the radiator sucked it back up ...

Any help will be appreaciated.
THanks!

 

[olmytsi]

Could be anything from a bad thermostat, bad radiator cap, to a headgasket. Start with a compression test.

 

[RyanTSi]

If you dont have a quick means to compression test, Id just throw a thermostat at it, I havent bought one in a while but I dont think they are too expensive in it is a likely culprit.

 

[fastestdsm]

mine does that too and goes up to ###### 75% of the way but doesnt spew out.

 

[yekrahs]

this happins all the time.....most of the time its from not pouring in coolant correctly....try this......let your car cool down #1, then take of your radiator cap and start your car. Pour fluid in until it stops bubbling and it starts to overflow.Put on the cap. Then fill up the Resevour and you should be good to go.

PS same thing happined to me

 

[yekrahs]

did this help your problem?