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T1G UP

Member Since: 08 Dec 2009
Location: Bath
Posts: 3101

2011 Defender 110 Puma 2.4 XS CSW Orkney Grey

change the traditional stat. its in the block for a reason. the other one it to speed up the heating of the heater...

18th Jan 2015 5:17pm

bear100

Member Since: 22 Mar 2010
Location: South Wales
Posts: 1953

2010 Defender 110 Puma 2.4 USW Santorini Black

Hi Andy, I am going to flush out and change the coolant as its due soon and as I have the stat here I was going to change it anyway, but it's proved harder than I thought!!

2023 Defender L663 V8
2016 Range Rover Autobiography 4.4 TDV8 (gone)
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)

18th Jan 2015 5:19pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5804

2006 Defender 110 Td5 USW Zermatt Silver

It always ways does turn out harder than it should be.

18th Jan 2015 6:01pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

Please do a report on your findings

never seen a engine with two thermostats

18th Jan 2015 7:19pm

Cheshire110

Member Since: 26 Jul 2013
Location: Cheshire/London
Posts: 2769

Sorry didn't read the whole thread above (out) but it's the plastic housed thermostat that I replaced & sorted my problem. It wasn't opening in warm water when I tested it.

This is the one I bought http://m.ebay.co.uk/itm/331132538262?_mwBanner=1

Replied to your Pm too Bear100

Cheers, David
Land Rovers of all shapes S3 onwardsâ€¦ Daily is a 110 V8.

18th Jan 2015 8:02pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

Thats the one

18th Jan 2015 8:26pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

munch90 is right

only the external (plastic housing) thermostat Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

18th Jan 2015 11:33pm

nickhodgson

Member Since: 08 Dec 2009
Location: Zambia
Posts: 174

The plastic one is the Puma one the other one looks like a 300tdi thermostat. The part number for the Puma thermostat (the plastic one in the earlier pictures) is the same as for a TD5 so its a part that has been used for a while. What is the problem? 1995 300tdi Defender 90 P/UP
2011 Puma Defender 130 D/C
2000 300tdi Defender 110 P/UP
2015 Discovery 4 SDV6 HSE

19th Jan 2015 7:47am

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

dgardel wrote:
munch90 is right

only the external (plastic housing) thermostat

Thank you

19th Jan 2015 8:28am

bear100

Member Since: 22 Mar 2010
Location: South Wales
Posts: 1953

so we can say Land Rover parts catalogue and the dealer and the work shop manual is incorrect?
Has anybody ever looked or changed the water pump? According to the manual there is one there??

Still just as confused

19th Jan 2015 10:34am

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

not in my manual there isn't , no mention of a thermostat near the pump

19th Jan 2015 10:38am

x-isle

Member Since: 26 May 2011
Location: Midlands
Posts: 1327

2007 Defender 110 Puma 2.4 XS CSW Santorini Black

Just to throw a spanner in.......

Isn't there the normal (plastic y-shaped one) thermostat which controls the water bypass for the heating circuit, but also another thermostat which controls the flow through to the oil cooler? Or is this integral to the oil cooler?

To quote the workshop manual;

"The engine cooling system cools the oil in the oil cooler and is regulated by means of a separate thermostat, which
prevents the flow of coolant through the oil cooler when the engine is cold, ensuring the engine oil warms up quickly.
The thermostat opens at 75±2°C (167±35°F)." Craig Rogers

2007 Puma 110 XS
2011 Evoque Coupe Dynamic Lux
www.craigrogers.photography

19th Jan 2015 10:48am

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

the oil cooler thermostat is in the little plastic pipe the joins to the oil cooler on the filter housing

and before anyone says it must be the top one in the first post picture , no it isn't , the cooler one is very small comes as part of the pipe is held in with one bolt and has a o ring to seal it

there is also a thermostat for the fuel and yes its not that one either

19th Jan 2015 11:03am

x-isle

Member Since: 26 May 2011
Location: Midlands
Posts: 1327

....but to answer the "which one is causing overheating".

If the ickle-micro-thermostats are not working then;

Oil cooler not cooling and/or fuel cooler not cooling could help towards engine getting hot.

However, I'd be more inclined to say it was the plastic jobby.

With the ones fitted to the Transit missing, I assume that the plastic one has been introduced due to the fact that the water has to flow to non-transit stuff. Therefore, the redesign took out the original Ford thermostat housing and replaced it with the well-known LR one. Craig Rogers

2007 Puma 110 XS
2011 Evoque Coupe Dynamic Lux
www.craigrogers.photography

19th Jan 2015 11:19am

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

"plastic jobby" is the one that controls engine temp

yes remote plastic jobby replaces transit set up

Last edited by munch90 on 19th Jan 2015 11:23am. Edited 1 time in total

19th Jan 2015 11:21am

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