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kweese

Member Since: 28 Apr 2015
Location: Van
Posts: 62

NO Coolant damage? Where is the Engine Temperatures Sensor?

Hi. I was on the highway yesterday and my coolant drained out through the same Welch (frost) Plug. I didnt realize until i saw the temp just shoot up for a second. I stopped the car and realized that there was no coolant. I drove another 20 km home, while watching the temperature guage. Does the temperature gauge only measure coolant temperature???

19th Jan 2016 8:28am

Mash

Member Since: 09 Feb 2015
Location: Guernsey
Posts: 1674

Most do yes, in this situation I would of topped up the coolant with water to drive it home. 90 wolf - Jasmin http://www.defender2.net/forum/topic39408.html
90 V8 - Maggie http://www.defender2.net/forum/topic42564.html
110 TD5 - Buggsy http://www.defender2.net/forum/topic59029.html
52HG25 lightweight https://www.defender2.net/forum/topic72342.html
D3 Hse - Fiona
Capri 2l S - Anna

Think I might have a problem............

19th Jan 2016 9:44am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17391

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Not sure about the TD5, but historically temperature senders have relied upon being in contact with the coolant in order to provide a reading. If there is no coolant, they will read low regardless of the engine temperature.

I have to say that there is no way I would drive a TD5 (or indeed any other diesel engine, or any other modern engine) 20km with no coolant since I think the risk of catastrophic engine damage is extreme.

Many years ago I owned a 1966 Triumph 2000 Mk1 with a 6-cylinder petrol engine (my first car, in fact). On one occasion that lost its coolant, and it was an interesting "learning experience" for a new-ish driver. At no time did the temperature gauge show the engine overheating, all that happened was the car became more and more sluggish, a hot smell developed, and eventually the engine stalled as the pistons seized in the bores. Amazingly once it had cooled down, I had fixed the leak and replaceed the coolant, it ran as well as ever with no sign of any damage!

I would not however knowingly ever subject a diesel engine to similar treatment since diesels have always been more susceptible to damage through overheating than perol engines.

Fingers crossed that your engine is OK!

19th Jan 2016 10:29am

ROBBONTHEROCK

Member Since: 23 Jun 2014
Location: Aberdeenshire
Posts: 637

2007 Defender 110 Puma 2.4 XS CSW Firenze Red

Diesels run hotter generally.

The OP might have gotten away with it, if the ambient temp is low enough, I note he is in Canada, so -25deg C with -50 wind-chill would definitely help in the engine cooling department.

I think TD5's run cooler anyway don't they, i.e. it takes ages to warm up?

Also note that the coolant would have drained to that level, so wouldn't have been completely empty.

Always a chance and well, at this stage what have you got to lose?!

Cheers
Andy

19th Jan 2016 12:51pm

4RF RDS

Member Since: 19 Jul 2015
Location: Ottawa
Posts: 934

2000 Defender 110 Td5 XS CSW Epsom Green

only thing to do is to replace plug, refill, bleed and see what if any thing is up?

Good luck 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)

19th Jan 2016 3:04pm

4RF RDS

Member Since: 19 Jul 2015
Location: Ottawa
Posts: 934

only thing to do is to replace plug, refill, bleed and see what if any thing is up? (Edit...not sure this posted twice???? Sorry).

Good luck 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)

Last edited by 4RF RDS on 19th Jan 2016 10:38pm. Edited 1 time in total

19th Jan 2016 3:05pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

4RF RDS wrote:
only thing to do is to replace plug, refill, bleed and see what if any thing is up?

Good luck

37D2260L one on the head at the back and one short block alt side

LCM100150 one on stort block alt side

ERR6674 one on the head at the front

19th Jan 2016 3:51pm

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