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Discussion Starter · #1 ·
Hi All

Ive got a 2003 52 plate Freelander, does anyone the correct way to bleed air from the coolant system. With the engine cold, I removed the expansion tank cap, removed the bleed screw from the heater hose & coolant came out, screwed it back & unscrewed the one in the pipe going to the rad, coolant came out & then screwed it back. started the engine, revved it & I still could hear water slushing thru the heater. Have I done it right?

Thanks

Tess
 

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Did you replace the coolant recently?

From refill you have to open the bleed valve on the coolant elbow running from back of engine to lower Rad hose (petrol engines) not sure about the set-up on the diesels.

Lower coolant valve is 8mm bolt. Its located on the passenger side you will need to remove air filter housing to get at it.
to refill:
Open cap, loosen 8mm bolt and heater hose bleed screw.
bleed until coolant runs without air bubbles from lower valve, tighten the 8mm bolt.

Keep expansion tank topped up as a low level can draw more air into the system.

Eventually coolant will flow from valve on upper heater. Again bleed until all air bubbles are removed.

Start engine, run for few minutes, bleed again from heater matrix hose only.

Repeat until all air is removed.
 

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Discussion Starter · #3 ·
Hi D.R

I didnt renew the coolant,I just topped up the coolant & noticed this slushing noise from the heater. So I should only undo the bleed screw in the heater pipe to release the air?

Thanks

Tess
 

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Yeah just open the bleed screw on the heater matrix hose. Turn the heater dial to full heat, stretch the hose so the valve is at the highest point, this will cause the air pockets to rise to highest point, then open and bleed.

Run the engine for few minutes then repeat.

Have you checked the oil and coolant for signs of gunge, sometimes hgf can cause this leading to air trapped in system. But dont panic just yet thre are other things to rule out before hand.

More than likely it was just 'contraction' of the coolant in the cooler weather that caused the air pockets, air gets drawn into the system due to low levels in the expansion reservior
 

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Did you replace the coolant recently?

From refill you have to open the bleed valve on the coolant elbow running from back of engine to lower Rad hose (petrol engines) not sure about the set-up on the diesels.

Lower coolant valve is 8mm bolt. Its located on the passenger side you will need to remove air filter housing to get at it.
to refill:
Open cap, loosen 8mm bolt and heater hose bleed screw.
bleed until coolant runs without air bubbles from lower valve, tighten the 8mm bolt.

Keep expansion tank topped up as a low level can draw more air into the system.

Eventually coolant will flow from valve on upper heater. Again bleed until all air bubbles are removed.

Start engine, run for few minutes, bleed again from heater matrix hose only.

Repeat until all air is removed.
Hi Folks
I've read through with interest, and hope you resolved you issue Tess.

@D.R. I've just replace the pump, thermostat and belts and while a pian in the rear with a KV6 (2.5), I'm having difficulty with knocking the air out; a lot of steam from tank, the bleed valave, along with fan noise!

Where exactly is this 8mm bolt, i cannot see anything fitting that description?

KR, John

UPDATE: Sorry... Didn't see post date! If there is someone watching, help/advice would would be great. 👍 Appreciated

UPDATE: Got it sorted now... It seems, unlike some models that are self bleeding, meaning... Vauxhall pushes air out the "bottom" of the expansion tank then redraws from the place, the freelander doesn't!! 😣 Weird.
 
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