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buckers19



Member Since: 02 Jan 2018
Location: London
Posts: 95

1993 Defender 90 300 Tdi CSW Barolo Black
Curious Coolant Colour
I’m lining up a few jobs to be completed and noticed my coolant has gone a peculiar colour. Anything to be concerned about or a system flush required?

Click image to enlarge
 Instagram.com/mattbuckley19
Post #814192 8th Feb 2020 3:42pm
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BaronDefenders



Member Since: 28 Jun 2019
Location: London/Cotswolds
Posts: 903

United Kingdom 2004 Defender 90 Td5 CSW Santorini Black
Try drawing a small volume out with something like a syringe to see what colour it actually is. I've noticed that pink OAT coolant can look a strange, almost brown, colour when it has a black background, such as a radiator hose. Charlie

1949 Series 1 80 (SOLD)
2002 Td5 90 (SOLD)
2008 Freelander 2 (SOLD)

1958 Series 2 88 Pastel Green (2019 LR Legends Best Restored)
1983 V8 110 Limestone (Previously owned by Tom Sheppard MBE)
2004 Td5 90 Santorini Black (Td5INSIDE Powered & Rebuilt by CSK)
2012 Puma 110 Zermatt Silver (Overlanding Build)

Instagram: @BaronDefenders
Post #814194 8th Feb 2020 3:49pm
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Horneteer



Member Since: 10 Feb 2015
Location: Cornwall
Posts: 60

United Kingdom 1986 Defender 90 200 Tdi SW Firenze Red
Looks like a Tdi fuel pump in the background, so the coolant should be blue/green in colour for ethylene glycol coolant not the rusty brown colour.
A system flush and refill seems like a good idea. Then keep an eye on it. It may just be that the old coolant is exhausted and overdue for a change as this type only has a service life of 2-3 years.
Post #814378 9th Feb 2020 6:25pm
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benniferj



Member Since: 20 Oct 2016
Location: Basingstoke
Posts: 361

United Kingdom 2003 Defender 110 Td5 XS CSW Oslo Blue
When did you last change it? That looks rancid... get it out of there asap.
Post #814465 10th Feb 2020 10:31am
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buckers19



Member Since: 02 Jan 2018
Location: London
Posts: 95

1993 Defender 90 300 Tdi CSW Barolo Black
I’ve never changed it in the time I’ve had it (3 years). I’m going to sort it out this weekend. Interestingly the engine stills runs at the correct temperature but I’ll definitely flush it. Instagram.com/mattbuckley19
Post #814472 10th Feb 2020 11:29am
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