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excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5864

1999 Defender 110 Td5 SW Caledonian Blue

TD5 Coolant quantity/type

Time to replace the coolant.
So how many litres are needed and is it worth buying neat/concentrate or pre-mixed?
From what I have read its Red OAT coolant required?

Is there a more transparent header tank available or is mine just a few years old and just not as transparent as it should be.? 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

31st Jul 2017 12:45pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2187

Red OAT. They are opaque from new.

31st Jul 2017 1:31pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5864

Cheers.

So one these four?
http://www.halfords.com/webapp/wcs/stores/...rn=s162brc 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

31st Jul 2017 1:44pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2187

Yup. Premixed or mix yourself.

TD5 takes around 11 litres if you drain the entire system to zero. Round about 5 litres if you drain the majority

31st Jul 2017 1:53pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5864

So a drain, flush through and then 5L of premix and top with water. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

31st Jul 2017 2:20pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2187

No. Premixed is, premixed, you just poor it in.

31st Jul 2017 2:31pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5864

If I was to drain out more than 5L and filled with premix but still needed to top up, I would top with water. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

31st Jul 2017 3:02pm

miker

Member Since: 13 Sep 2015
Location: Surrey
Posts: 1766

For the price difference it makes more sense to buy concentrate. put 5l in then fill the rest with water.

It's a pretty hard system to drain properly. When I first did mine I kept finding pockets of yellow/green fluid! Had to bust off several pipes and flush through with loads of water.

31st Jul 2017 3:32pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5864

Dropped the coolant yesterday and swapped the thermostat. Gave the rad a flush and the heater matrix as well. Gone clean water out.
Got 5l of red OAT in and 2.5l of water.
Went to undo the bleed screw and managed to break the rubber so now the bleed screw does not seal...... so a new hose needed.

1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

13th Aug 2017 4:29am

Tommo

Member Since: 19 Dec 2013
Location: Leicestershire
Posts: 830

2006 Defender 90 Td5 Black LE Java Black

Hi excossack
same happened to me with bleed screw. Brought new one from dealer and managed to get a purchase on broken screw that was left in and slowly unwound it. Even tried to drill it out but eventually used pliers (thin nose) and got it out that way to Hugh relief

13th Aug 2017 8:19pm

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