Ok so I have single cam vtech and my car over heats on the high way at lik 180kph, not sure whay but stops when I slow down! please help it not boosted and it seem that the overflow blows collant out of it!

 

Let's hope it's the radiator itself and not a leak in the engine. When the water passages in the radiator are blocked or the air fins are corroded, there just isn't the capacity to stay cool at highway speed.

There is a test for the engine or head gasket leak.

Once it overheats for any reason, it will tend to overflow. If there is coolant blowing out before it overheats, that would point to a leaky engine.

 

i got the same problem, when i exceed 75 mph it overheats, but when i iget down to 65 mph, it stops overheating and acts normal, its a weird problem, lemme know how it turns out

 

flush the radiator coolant out, and check your radiator to see if its sending coolant to the engine.