My first post so drinks are on me.
I've recently bought a 99 1.5d Saxo.
Had to drain the coolant as there was no antifreeze in the system.
Now I've refilled it complete with antifreeze but there is no hot air coming out of the heater.
I'm assuming that there is a valve somewhere to release the air from the matrix.
Thanks in advance.
Where is the bleed valve for the Saxo heater matrix
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Where is the bleed valve for the Saxo heater matrix
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Welcome to the forum
I can't say specifically for the Diesel Saxo but on the petrol ones there is a bleed valve right on the elbow by the matrix connector.
petrol Saxos are a bit of a trial to bleed as the expansion tank is lower than the topmost parts of the cooling system. There are three bleed valves, one on top of the rad, one on the thermostat housing and one on the matrix elbow.
Fill with them all open and observe that coolant flows out of them all, especially the rad and thermostat housing.
I can't say specifically for the Diesel Saxo but on the petrol ones there is a bleed valve right on the elbow by the matrix connector.
petrol Saxos are a bit of a trial to bleed as the expansion tank is lower than the topmost parts of the cooling system. There are three bleed valves, one on top of the rad, one on the thermostat housing and one on the matrix elbow.
Fill with them all open and observe that coolant flows out of them all, especially the rad and thermostat housing.
Jim
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Again from memory as its been a few years, there is usually one on the radiator (passenger side, right on the top) and one on the hose near the back of the cambelt, it pokes up into almost a U bend shape has a tyre valve type cap on that one. You cannot miss it.
Andy.
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It should be. I would expect to see two pipes running together through the bulkhead to the matrix.MULTIMENTAL wrote: Is the valve visable without removing anything?
One of the pipes should have the valve on it, either looking like a small wheel or more possibly like a tyre valve cap. If the latter, take care as they can pop off if unscrewed too far and be lost. Although they look like a tyre valve cap, they are in fact a bit different.
Jim
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Thinking a bit more about this, if you refilled without cracking open any bleed valves then you may well have a very significant airlock in the cooling system.
This air lock may be stopping coolant flowing around the radiator as well as the matrix. In this current cool weather and the generally cool running of a diesel, this may not be immediately obvious.
So, bleed the system fully and bring the engine up to full operating temperature whilst checking that the top hose gets hot when the thermostat opens and that the radiator is warm all over.
As the expansion tank is lower than the top of the system, bleeding is assisted greatly by using an old 2L coke bottle with the bottom cut out to act as a secondary header tank. The neck of the coke bottle can be sealed into the expansion tank filler neck with blu tak or plasticine.
Ensure the bleed valves on the top of the radiator and thermostat housing expels plenty of coolant. You then know both the engine and rad are full of coolant.
Run the engine, with header tank in place until the cooling fans cut in and out again.
Do not replace the cap on the expansion tank until the engine has cooled down.
This air lock may be stopping coolant flowing around the radiator as well as the matrix. In this current cool weather and the generally cool running of a diesel, this may not be immediately obvious.
So, bleed the system fully and bring the engine up to full operating temperature whilst checking that the top hose gets hot when the thermostat opens and that the radiator is warm all over.
As the expansion tank is lower than the top of the system, bleeding is assisted greatly by using an old 2L coke bottle with the bottom cut out to act as a secondary header tank. The neck of the coke bottle can be sealed into the expansion tank filler neck with blu tak or plasticine.
Ensure the bleed valves on the top of the radiator and thermostat housing expels plenty of coolant. You then know both the engine and rad are full of coolant.
Run the engine, with header tank in place until the cooling fans cut in and out again.
Do not replace the cap on the expansion tank until the engine has cooled down.
Jim
Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
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