 | Home > Tdi > 200tdi getting hot! |
 
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| c18rch Member Since: 28 Nov 2012 Location: Sheffield Posts: 28   
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If it were me I would bleed the system just to be sure first, then....
Have you checked what the temp actuually is? Does it get hotter more quickly than you would expect? Get one of those IR thermometers of ebay/amazon (~£8 ) if you haven't got one already. Check what temp the core plugs etc are actually at. If it is not actually getting up to temp, it is the sender or the guage. I had a bad earth on the temp gauge which made it look as though it were overheating. Engine wasn't even warm. 1988 110 200TDi Hard Top Last edited by c18rch on 28th Nov 2018 1:48pm. Edited 1 time in total |
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28th Nov 2018 12:40pm |
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| Whirly90 Member Since: 01 Sep 2016 Location: Ampshire Posts: 406  
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Make sure it really is over heating, it's a Tdi engine in a pre-Tdi vehicle so it could be that the sender and gauge are incompatible. I had the same problem and ended up putting an aftermarket gauge/ sender in, problem solved.
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28th Nov 2018 12:48pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6611 
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Is it a Disco engine?
If so it might want the sender swapping to PRC6663 which fits the 200 Tdi Disco engine but is the correct type for a Defender gauge (it's the 2.5TD/NA/etc sensor).  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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28th Nov 2018 1:00pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6611
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OK I can see it is a Disco engine
 https://www.defender2.net/forum/topic55755.html
Has it always done it or only just started? 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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28th Nov 2018 1:07pm |
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| Buz Member Since: 24 Jan 2014 Location: Forest of Dean Posts: 238 
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Hi Martin, yes it is a Disco 200, you are correct, it has only just done this, usually drives with the indicator slightly under halfway, even in the hot summer.
I changed the thermostat (not ad chance to test the old one). Took it for a run, it is now staying just above the halway, so seems a little hotter than before. I did notice the old Thermostat had an 82c opening where the new one is 88c, so I guess tis will make it run slightly warmer. I ave one of the IR temp sensor things. The thermostat housing is about 60c on the outside, the block is running anywhere from 60-70c depending on where the temp is read. The rad is reading 51c where water enters and 30-45 where it leaves the rad at the bottom. This fluctuation I guess is due to the thermostat opening or closing? |
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28th Nov 2018 4:25pm |
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| OJ Member Since: 23 Nov 2018 Location: North of Edinburgh Posts: 121  
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It might be worth checking the sender unit, had a similar problem but it was created by someone fitting the wrong sender in the past. Gave all the indications of overheating but it wasn’t, your engine temperatures are similar to my 300 tdi.
OJ |
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28th Nov 2018 5:50pm |
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| Romadog Member Since: 07 Jul 2011 Location: Powys Posts: 1749 |
Check the rad is not furred up....
Had a 200tdi some years ago and fitted many thermostats to alleviate the sudden overheating. Also changed water.pump! Turned out to be furred up rad inside. Used correct coolant but still did this. There's a volume that it should hold, I suggest testing how much it currently holds and compare. |
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28th Nov 2018 7:33pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8051  
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The ir temps seem ok to me and thermostats, rad seem to be fine.
Electrical? Cheers James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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28th Nov 2018 7:44pm |
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| OJ Member Since: 23 Nov 2018 Location: North of Edinburgh Posts: 121
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Sounds like a good plan, at least give it a good flush anyway, mine holds about 10 litres from memory, |
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28th Nov 2018 7:51pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8051
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If the rad is taking it from 50 to 30deg surely it's working Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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28th Nov 2018 8:01pm |
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| OJ Member Since: 23 Nov 2018 Location: North of Edinburgh Posts: 121
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Good point James, suppose its a process of elimination until the faults found, if the stats been dropped to an 82 in the past it may be a historical problem
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28th Nov 2018 8:07pm |
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| Buz Member Since: 24 Jan 2014 Location: Forest of Dean Posts: 238
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Thanks everyone for the great input.
The rad was replaced within the last 3 years so I would hope it isn't furred up (yeah, I know it could be) The thermostat was changed also about 3 years ago, I'm guessing it was the only one the guy had available at the time, rather than an 82c being used for a specific reason. The bottom of the rad goes from warm/hot to virtually cold at intervals, so I'm assuming this is the thermostat opening/closing and making the temp difference. I think the next plan is to drive it, carry spare water with me, check levels often, if the gauge starts to go up, use the IR meter to see where any hot spots are. |
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28th Nov 2018 11:08pm |
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| OJ Member Since: 23 Nov 2018 Location: North of Edinburgh Posts: 121
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Hi Buz
Is the viscous fan still in place and working, if so how far away from the radiator is it, if the disco engine has been fitted further back the fan may not be doing anything useful, its fairly common to remove the viscous fan and fit an electric one closer to the radiator thats more efficient. Hope you get it sorted OJ |
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29th Nov 2018 11:11am |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8051
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I have a disco 200 in a defender with viscous fitted, shortened blades, although long way back from cowling with rad in std place works fine on cooling front. Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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30th Nov 2018 6:04am |
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