Hi all,

I've got 1995 wrx, I went to take it out this morning
And the temperature gauge got very hot and overheated,
Yet there was no hot air blowing through the heater.
I'm thinking thermostat but would it go just like that?

Any help would be good thanks

 

If the heater blows cold it's usually an indication that the matrix has no coolant in it. Check your fluid level and then find out where the leak is coming from by inspecting the engine bay as the car gets up to temperature.
It's most likely to be the header tank, radiator or water pump. Let us know how you get on.

 

Ok thanks
I did find a leak in the front of the radiator but sealed that using some special
Formula, I felt the bottom rad hose when it was up to temperature and it was stone cold?

 

Pop the thermostat out and see if it opens in a saucepan full of boiling water, that will tell you if it's working properly or not.

 

The heater should get hot before the stat opens.
You could have a big air lock somewhere?

 

Where is the thermostat?
And how would Bleed the system on these?
Thanks

 

Burp the system, whack a large funnel into the header tank. Seal it best you can, and have some spare ready made coolant on standby.

Fire it up and once the water starts rising into the funnel, rev it gently. You might see lots of bubbles coming out. This is what you want. Then pour in some coolant into the funnel as the funnel level drops again.

The amount of coolant you get back in should roughly be the size of the air lock.

Switch off, let it all cool down for at least 45 mins, then top up the header tank if needed.

 

Or, better still, do it properly.

Completely drain and refill as explained on here loads of times.

There is no known way to effectively bleed the cooling system of a Scoob...you might, but you just might not, and running it with an airlock WILL destroy head gaskets, which, in turn, can destroy the engine.

 

Problem was a major air lock in the cooling system
Thanks for all your help