Thread: 97 disco radiator bleeding

On the discos there is a bleed screw in the top hose. To get the air out the manual says to lift the overflow bottle up higher than the top hose with the bleed screw undone and top it up until the water runs out the bleed screw.

With the bleed screw in the top hose its also possible to loosen it while hot to get some air out but this is a bit dodgy from a safety point of view.

James

Thanks James.The top hose on my engine does not have a bleeding outlet.Maybe it's only on the factory Land Rover hoses.Cheers Shane.

When you fill the rad make sure your heater is set to hot so the coolant also cycles through the heater maxtrix and hoses. As air can be in these as well.
Never seen a bleed hole on D1s top rad hoses.
Earlier Discos might have had a bleeder on the heater hose pipe area

When you fill the rad make sure your heater is set to hot so the coolant also cycles through the heater maxtrix and hoses. As air can be in these as well.
Never seen a bleed hole on D1s top rad hoses.
Earlier Discos might have had a bleeder on the heater hose pipe area

RRC after 1990? do have a bleed in the heater hose.
All I do with my RRC is face the car steeply up hill and fill from the radiator bung. The trick is to fill to the highest point . Make sure there is at least 9 litres or so in there.
Start her up until the thermostat opens which you can feel by the top hose getting warm. Run for a while then turn off and let cool, then check all the levels again.
Regards Philip A

Originally Posted by PhilipA

RRC after 1990? do have a bleed in the heater hose.
All I do with my RRC is face the car steeply up hill and fill from the radiator bung. The trick is to fill to the highest point . Make sure there is at least 9 litres or so in there.
Start her up until the thermostat opens which you can feel by the top hose getting warm. Run for a while then turn off and let cool, then check all the levels again.
Regards Philip A

But he has a 97 Disco motor in it, so it might also have the disco heater pipes .
Having the heater system open would then discount any air in there.

Had the same issue when fitting a serpentine engine to a 1975 RR. You MUST ensure correct flow to the heater and through the manifold inlet/ outlet to avoid this. I used the Disco expansion tank etc also, and made certain it was the highest point in the cooling system.

JC

Have you connected the small hose from the back of the thermostat housing to the top tank of the radiator? I haven't had trouble bleeding a V8 with this hose connected. I have retrofitted a couple of earlier V8's with this hose, then you run the engine at a fast idle and it expels all the air by itself. You just look down the filler plug of the rad until the bypass flows coolant and off you go.

Thanks Bee Utey,but I can't see a hose connection anywhere near the thermostat housing only the small hose from the top of the radiator to the bottom of the plenum chamber,is this the radiator bleed line..I have read that some people advise to bleed with the engine not running,would this only be possible with a certain type of thermostat that allowed the air to pass without being warm and open.Cheers Shane.