Cold Blowers

[deang2510]

Hi can someone help me please

My car has recently starting blowing cold air when at normal temp of 90. When the car was cold I took coolant cap off and the coolant poured out with the pressure. I've tried running it with the cap off to see if it was an air lock but the problem still exsists. Could it be the thermostat?

 

Thanks

 

 

[seatkid]

Please provide car details, engine and year.

 

If its a diesel, then its probably either the electric run-on pump has failed (Mk2 diesels only) , or the main water pump, though this often also gives overheating symptoms, (not always, as it can still work weakly - the plastic impeller becomes detatched from the shaft. )

 

http://www.fordgalaxy.org.uk/ford/topic/7510-diesel-run-on-water-pump/?do=findComment&comment=54739

 

A faulty thermostat you would not see normal 90 deg temp on the gauge and you would still see some lukewarm air from the heater.

 

My bet would be the main water pump as these are common failures.

Edited October 16, 2013 by seatkid

[chrispb123456]

If coolant and pressure came out when you removed cap with cold engine, firstly check at small return hose to bottle is returning coolant back to the bottle? as there is a restriction in that pipe that can get blocked.

If it is returning coolant and air bubbles then you most likely have at head gasket failure.