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STU TDV8



Member Since: 03 Apr 2016
Location: norfolk
Posts: 65

United Kingdom 2007 Range Rover Vogue TDV8 Java Black
TDV8 Air in the coolant

My TDV8 is bubbling air in the header tank ? , Done the block test and the fluid doesn't change colour so it's saying there isn't co2 in there ? . Also it isn't using water or loosing water and there is pressure still in the header tank in the morning ??..

Post #380606 3rd Apr 2016 8:27pm
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northernmonkeyjones



Member Since: 24 Mar 2012
Location: derby
Posts: 8517

United Kingdom 2016 Range Rover Autobiography SDV8 Santorini Black

Are you sure?

There is a fluid bleed off screw on the top of the tank, could this be loose?
Where are the bubbles coming from? There is a pipe to the top of the tank and one to the bottom as well, the one at the bottom can chaff, and leak which could suck in air.

Are you removing the cap cold every time? Because if you remove it when the fluid is hot then again at a different temp you will get a different standing pressure in the header. Remove when cold in the morning, then only again the next morning when the ambient is the same. Thumbs Up

But you shouldn't be able to have a high pressure and a leak at the same time.

it's likely air from the header tank being sucked back into the system through the top hose as the pressure drops, then as the pressure rises it bleeds back into the header. If you aren't losing fluid, have no co2 in the header and don't have contaminated oils, then I wouldn't worry.

That's my take on it, but someone may come along with another idea Thumbs Up There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6


Last edited by northernmonkeyjones on 3rd Apr 2016 8:47pm. Edited 1 time in total

Post #380607 3rd Apr 2016 8:40pm
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STU TDV8



Member Since: 03 Apr 2016
Location: norfolk
Posts: 65

United Kingdom 2007 Range Rover Vogue TDV8 Java Black

Yeah the bleed screw is tight for sure , The air is coming from the top mainly but does also come from the bottom too . I dont have a leak just air consistantly bubbling mainly in the top pipe that comes from the top hose..

Post #380609 3rd Apr 2016 8:47pm
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northernmonkeyjones



Member Since: 24 Mar 2012
Location: derby
Posts: 8517

United Kingdom 2016 Range Rover Autobiography SDV8 Santorini Black

Just to check is the coolant pink? There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6

Post #380610 3rd Apr 2016 8:49pm
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STU TDV8



Member Since: 03 Apr 2016
Location: norfolk
Posts: 65

United Kingdom 2007 Range Rover Vogue TDV8 Java Black

Just bought it like it (knowing the issue) it just has water in it..

Post #380611 3rd Apr 2016 8:52pm
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northernmonkeyjones



Member Since: 24 Mar 2012
Location: derby
Posts: 8517

United Kingdom 2016 Range Rover Autobiography SDV8 Santorini Black

It needs proper coolant, it can take a while to self bleed. If it hasn't got pink in it then the coolant has been dropped out and needs replacing. It will slowly bleed out the air after it has been changed. Get the water swapped for some propert OAT pink coolant and run it for a while, to see what happens, it should stop bubbling once all the air is out. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6

Post #380613 3rd Apr 2016 9:00pm
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STU TDV8



Member Since: 03 Apr 2016
Location: norfolk
Posts: 65

United Kingdom 2007 Range Rover Vogue TDV8 Java Black

How could the bottom hose in the header tank cause air to be sucked in if it was under pressure or is that pipe not under pressure ?.

Post #380614 3rd Apr 2016 9:00pm
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