sws0168
New Member
- Posts
- 71
- Location
- North Wales.
Just changed the water pump on my M Reg disco 300 tdi now can't get the air lock out of the system, anyone know the best way. thanks.
coolent air lock
- Thread starter sws0168
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
ironhorse
Active Member
- Posts
- 278
- Location
- West Sussex
I use a hose pipe connected to the mains, connect up to the top heater pipe and push the water round with the hose, when all air or clear water comes out pull hose off and reconnect top hose quickly.
Mark151151
Active Member
- Posts
- 270
- Location
- Edinburgh
Heres how i do it:
Ok start by removing plug from radiator and thermostat housing.
Start filling expansion tank until coolant/water flows from top of radiator, screw this plug back in.
Continue filling through expansion tank until the level in the tank is right then screw the lid on the expansion tank.
Now slowly fill through the hole in the thermostat housing. Once it's full gives the top radiator hose a few squeezes to push any air out then top up and fit plug.
Now start the car for about 10-15 seconds stop it remove the plug from thermostat housing and top up then replace the plug.
Run the car for about 30 seconds and do the same.
Run the car about a minute and do the same.
Now finally run for 5-10 mins and check again.
It should be properly bled now.
At no point open the expansion tank and the top plug at the same time once bled otherwise the water will flow down from the thermostat into the expansion tank.
The other way iv done that works but its not pretty is to fill the radiator full. Fit the plug then fill the expansion tank full, get a friend to blow as hard as possible into the tank- the water will be forced up and out the thermostat housing. As soon as the water appears out the thermostat housing screw the plug in quick then your friend can stop blowing. Job done. Personally I prefer my first method.
Cheers mark
Ok start by removing plug from radiator and thermostat housing.
Start filling expansion tank until coolant/water flows from top of radiator, screw this plug back in.
Continue filling through expansion tank until the level in the tank is right then screw the lid on the expansion tank.
Now slowly fill through the hole in the thermostat housing. Once it's full gives the top radiator hose a few squeezes to push any air out then top up and fit plug.
Now start the car for about 10-15 seconds stop it remove the plug from thermostat housing and top up then replace the plug.
Run the car for about 30 seconds and do the same.
Run the car about a minute and do the same.
Now finally run for 5-10 mins and check again.
It should be properly bled now.
At no point open the expansion tank and the top plug at the same time once bled otherwise the water will flow down from the thermostat into the expansion tank.
The other way iv done that works but its not pretty is to fill the radiator full. Fit the plug then fill the expansion tank full, get a friend to blow as hard as possible into the tank- the water will be forced up and out the thermostat housing. As soon as the water appears out the thermostat housing screw the plug in quick then your friend can stop blowing. Job done. Personally I prefer my first method.
Cheers mark
sws0168
New Member
- Posts
- 71
- Location
- North Wales.
Hi, Thanks for the reply's, ran into an old mate who is a Landrover mechanic, he said all you need to do is take the expansion cap off, take the rad plug out, fill the rad put the plug back and run the engine at 3000 rpm for a minute until hot then put tank cap back on, heater now hot. result.!!!
Cheers.
Cheers.
