
Coolant change
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Coolant change
With winter looming (where the feck was summer?)
i was thinking of draining the coolant and putting in new, i have to buy anti freeze anyway so might aswell. is there a 406 way of doing this easily? also do you lot prefer a certain brand?

Re: Coolant change
Not sure about the hdi but the xud requires an expansion tank on the coolant reservoir to enable you to bleed the system properly.
Easiest options are jacking the car up nice and high on the drivers side to raise the reservoir above the bleed valves or using the anti-freeze bottle with the bottom cut off and an o-ring as a heath robinson expansion tank.
Not sure about brands, I usually go for what ever is in the bargain bin.
If you're doing a complete change it doesn't apply but don't mix different types as they have been known to turn to jelly when mixed. Might be worth draining and flushing with clean water before refilling.
Easiest options are jacking the car up nice and high on the drivers side to raise the reservoir above the bleed valves or using the anti-freeze bottle with the bottom cut off and an o-ring as a heath robinson expansion tank.
Not sure about brands, I usually go for what ever is in the bargain bin.
If you're doing a complete change it doesn't apply but don't mix different types as they have been known to turn to jelly when mixed. Might be worth draining and flushing with clean water before refilling.
1996 1.9 TD LX (Gone but not forgotten)
2003 2.2 HDI SE
2003 2.2 HDI SE
Re: Coolant change
Good shout on the flushing, i have no idea whats in there now that's why i thought complete change not a top up.gumby6371 wrote:Not sure about the hdi but the xud requires an expansion tank on the coolant reservoir to enable you to bleed the system properly.
Easiest options are jacking the car up nice and high on the drivers side to raise the reservoir above the bleed valves or using the anti-freeze bottle with the bottom cut off and an o-ring as a heath robinson expansion tank.
Not sure about brands, I usually go for what ever is in the bargain bin.
If you're doing a complete change it doesn't apply but don't mix different types as they have been known to turn to jelly when mixed. Might be worth draining and flushing with clean water before refilling.
Re: Coolant change
Yeah, give the system a flush before you drain it, use a flushing compound ....drain the radiator, it should have a drain plug, then take off a hose from the engine at the lowest point....be careful not to have the system too hot or you might get scalded.
To fill the cooling system undo the large round screw on top and in the middle of the radiator and undo the bleed screw going to the heater and the blue cap on the thermostat housing.
Pour in the anti freeze then water until the water floods out of the radiator screw on top of the radiator, tighten up the screw and carry on filling until water comes out of the heater bleed cap, tighten up the heater bleed cap and the blue one then start up the engine.
Run the engine and keep undoing the heater bleed cap until only water/coolant is coming out.
When the engine gets hot undo the blue cap and wait for water to flow out.
Keep feeling the radiator until it's hot all over then check that your heater is hot, if not undo the heater bleed and let the water flood out.....it's easier than this, you'll see.
In my experience it isn't required to use a header tank on any vehicle nor to jack it up high....I've never ever had to do that even on the XUD.
It's best practice to have the radiator higher than the heater, but not always required.
To fill the cooling system undo the large round screw on top and in the middle of the radiator and undo the bleed screw going to the heater and the blue cap on the thermostat housing.
Pour in the anti freeze then water until the water floods out of the radiator screw on top of the radiator, tighten up the screw and carry on filling until water comes out of the heater bleed cap, tighten up the heater bleed cap and the blue one then start up the engine.
Run the engine and keep undoing the heater bleed cap until only water/coolant is coming out.
When the engine gets hot undo the blue cap and wait for water to flow out.
Keep feeling the radiator until it's hot all over then check that your heater is hot, if not undo the heater bleed and let the water flood out.....it's easier than this, you'll see.
In my experience it isn't required to use a header tank on any vehicle nor to jack it up high....I've never ever had to do that even on the XUD.
It's best practice to have the radiator higher than the heater, but not always required.