Hi guys,so it seems like i got all the air out of the system but,from the hard pipes to the inlet of the rad the water is mad hot,but the water in the rad is stone cold,do you guys think it might be the water pump,Also when i have the car running i get warm air in the cab but when i turn off the car and just have the ignition on it goes cold again after 5 seconds.And help or advise would be fantastic guys.And thanks:helpsmilie:

Have you changed the thermostat while you were there

Have you done a block test to see if you have a blown head gasket? checked drivers and passenger side carpet in the foot well to see if you have a leaky heater matrix, brought the car up to temp and checked the lower rad hose to see if its compressing on its self?

 

EDIT, with the engine not running, water isn't circulating as the water pump only runs when the engine is running, so the heater matrix goes cold, hence getting cold air with the engine off.

Have you changed the thermostat while you were there

 

I tested the thermostat,when i replaced the timing belt and it was opening prefectly

Id hazard a guess given that the radiator is stone cold, one of a few things, blocked radiator, blocked radiator lower hose, thermostat failed where it doesn't open fully.

 

As i said, bring the car up to temp and check the lower radiator hose, see if its collapsing on its self

Have you done a block test to see if you have a blown head gasket? checked drivers and passenger side carpet in the foot well to see if you have a leaky heater matrix, brought the car up to temp and checked the lower rad hose to see if its compressing on its self?

 

EDIT, with the engine not running, water isn't circulating as the water pump only runs when the engine is running, so the heater matrix goes cold, hence getting cold air with the engine off.

 

Mate how do i do a block test?No the lower rad hose isnt compressing on it self.

Oh so the water pump must be ok if i am getting hot air at the vents

the water pump will circulate the water around the engine, with the thermostat closed, the engine builds up temp, at the correct operating temperature (76.6c on stock thermostat) the thermostat opens, allowing flow through the radiator, it comes in at the top and out at the bottom as the water pump pulls the water through the radiator.

 

I would bet your thermostat has failed, i had the same issue, it failed to open the correct distance when at temp. for the cost of them, you may as well just change it for a new one.

 

 

this might be useful for you.

http://z32.wikispaces.com/Cooling+System

 

Block tester kit from ebay is around £40, You use it by placing liquid into a container that goes on your radiator fill hole, you then press a squeeze that sucks air from the radiator into the container, if the liquid inside turns from blue to green, then you have exhaust gasses getting into the system, but at the moment, given your info, im still thinking thermostat.

So i ran the car up to temp,then i checked the bottom hose it doesnt comresss on it self,but then i squeezz the bottom hose it seems like i can hear the thermostat spring move

Also mate i forgot to mention the rad water drops slightly no even a cup full

Also mate i forgot to mention the rad water drops slightly no even a cup full

 

Id get that thermostat changed before anything else, put a brand new one in, they cost peanuts and worth it. then see if you still have overheating issues.

Thanks mate,yea i just ordered a gates one from mister auto for 15 euro.Hopefully that will do the trick

So i ran the car up to temp,then i checked the bottom hose it doesnt comresss on it self,but then i squeezz the bottom hose it seems like i can hear the thermostat spring move

 

that will be the little toggle valve moving on the back plate of the stat.... when you fit the stat the toggle pin should be at 12 oclock