Les Henson Posted March 25, 2006 Share Posted March 25, 2006 Do Turbo diesel engines run at a higher temperature than petrol equivalents? What's the optimum running temperature for the 2.5 TD engine? Can you tell what temperature range an individual thermal switch operates at from markings or whatever on the switch itself? (Intermotor in this case) Thanks. Les. Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 25, 2006 Share Posted March 25, 2006 Sometimes they have a part number (if so let me know I have a book of settings / part numbers, sometimes they have some like 82 94 on them,. The numbers are as simple as Will switch on at 94 degress, and will switch off when it drop to 82 degrees etc. Other option is tell me the settings you after On / Off and I'll look up a part number / vechile to visit in scrappy Nige Quote Link to comment Share on other sites More sharing options...
NegevLandRover Posted March 25, 2006 Share Posted March 25, 2006 The 300 TDI optimum operateing temp is 88 celsius. Each engine has it's optimum temp which is, if all is working properly, determined for the most part by your coolant thermostat which opens at a set temp. Some engines like the 200 TDI and 300 TDI also have oil thermostats which also help determine engine temp - mainly keeping them warm enough. A cold engine can be as disastorous as a hot one in that cold oil does not get to all the places it should and then the engine self destructs - this happened to me as the previous owner took out the oil thermostat for some weird reason. Red line on a 300 TDI is 116 celsius. I run a VGO coolant temp gauge aswell as a thermocouple electronic gauge which measures the block temperature giving me a cross reference aswell as a failsafe should the coolant level fall or the pump cease etc. The thermocouple gauge is also linked to a buzzer that is set to sound a 112 celsius. Adam Quote Link to comment Share on other sites More sharing options...
western Posted March 25, 2006 Share Posted March 25, 2006 IIRC my old 2.5TD engine had a 82degree thermostat fitted, so I reckon the temp transmitter would be a similar rating. Quote Link to comment Share on other sites More sharing options...
kkk2 Posted March 26, 2006 Share Posted March 26, 2006 If you fit a disco 300 tdi engine to a defender you must fit a "Black Top" sender as opposed to the "Green topped" one fitted to Disco's, The Disco sender reads high on a Def, temp gauge. Quote Link to comment Share on other sites More sharing options...
Diff Posted March 27, 2006 Share Posted March 27, 2006 Do Turbo diesel engines run at a higher temperature than petrol equivalents?What's the optimum running temperature for the 2.5 TD engine? Can you tell what temperature range an individual thermal switch operates at from markings or whatever on the switch itself? (Intermotor in this case) Thanks. Les. Hi Les, Most engines optimum running temp regardless of whether petrol or diesel is approx 88-90 degrees. However diesels don't tend to generate as much heat as petrols. For this reason, tdi s have an 88 degree thermostat as standard, whereas the petrol landrover engines have an 82 degree thermostat.(assuming both are uk spec). As has been pointed out by others, some of the switches are marked with either a part no. which relates to the operating temps, or the have the actual temps marked on them. Here is an excellent article by 'bull bar cowboy' on this forum about twin fans etc, and includes a list of switch no.s and temps: http://www.juracid.demon.co.uk/lr/twin_fans.html I have a 50011 93 degrees on, 88 degrees off switch in the top hose of my 2.5 petrol with a single electric fan. Works fine but has round terminals. The temp goes to about 3/4 on the guage before coming on and goes off when temp is just over half on the gauge. The more common 92-88 switches should work fine too. Regards, Diff Quote Link to comment Share on other sites More sharing options...
rick Posted March 28, 2006 Share Posted March 28, 2006 remember that the rating of a t/stat is its opening temp. A thermostat should be fully open approx 12*C above opening temp. This gives a fair leeway in actual operating temp. On the VDO thermometer I have in the 300tdi i can watch the t/stat open and modulate, and it generally runs around 90-92*C in 'normal' conditions, going up to 96-98 climbing (any ambient). Quote Link to comment Share on other sites More sharing options...
reads90 Posted March 28, 2006 Share Posted March 28, 2006 remember that the rating of a t/stat is its opening temp.A thermostat should be fully open approx 12*C above opening temp. This gives a fair leeway in actual operating temp. On the VDO thermometer I have in the 300tdi i can watch the t/stat open and modulate, and it generally runs around 90-92*C in 'normal' conditions, going up to 96-98 climbing (any ambient). Well on this subject , the thing that has really surprise me here in Aus is how the 300 TDi is doing with the heat. Remeber it is a Brit car and not an Aus spec. (not that i think they are differant anyway.) We have been driving for the last couple of days with the temp at 38 degrees c in the shade. It has been 46 degrees in the car . We are loaded up in the 90 and towing a trailer (which is also loaded up recon it weighs about 1.5 ton). But the needle on the temp gauge is staying in the middle and the engine is not getting hot. Quote Link to comment Share on other sites More sharing options...
Paul Posted March 28, 2006 Share Posted March 28, 2006 Hmm, but that would be a standard LR temp gauge though would it Ali? You might be surprised to see what the temp does if you had a quality mechanical gauge hooked up. As Rick has said above, you'll actually see the temp move around a lot more. But I agree, the Tdis do cope well with Oz temps, at least until you switch the A/C on. Paul Quote Link to comment Share on other sites More sharing options...
Gromit Posted March 28, 2006 Share Posted March 28, 2006 the thing that has really surprise me here in Aus is how the 300 TDi is doing with the heat. I had a 1/2 loaded 200tdi in 40 degrees with no viscous fan and probably only about 1/2 the fins left on the radiator and it only heated up on prolonged hill climbs. Standard temperature gauge fitted but they definately run cool. Quote Link to comment Share on other sites More sharing options...
NegevLandRover Posted March 28, 2006 Share Posted March 28, 2006 Well on this subject , the thing that has really surprise me here in Aus is how the 300 TDi is doing with the heat. Remeber it is a Brit car and not an Aus spec. (not that i think they are differant anyway.) We have been driving for the last couple of days with the temp at 38 degrees c in the shade. It has been 46 degrees in the car . We are loaded up in the 90 and towing a trailer (which is also loaded up recon it weighs about 1.5 ton). But the needle on the temp gauge is staying in the middle and the engine is not getting hot. Reads 90 - do your self a big favour and change the standard LR temp gauge ASAP - they are no where near adequate for hot climate engine management and by the time it screams it will be too late to save the day. Most will tell you that the ambient temp will not make much of a difference but I live in an area with extreme temp variations from season to season and from day to night and with the after market temp gauges I run I can see a marked difference in engine temps related to both ambient temps and engine loading. I run a mechanical VDO and a thermocouple digital gauge (the latter is linked to an audible buzzer just in case I am day dreaming when the proverbial sh!i hits the fan). The main problem with coolant gauges is that if and when the coolant level drops the gauge will not register a temp change untill it is too late so you should fit either a coolant level alarm or a thermocouple temp gauge which measures engine head temps. Adam Quote Link to comment Share on other sites More sharing options...
reads90 Posted March 31, 2006 Share Posted March 31, 2006 Hmm, but that would be a standard LR temp gauge though would it Ali? You might be surprised to see what the temp does if you had a quality mechanical gauge hooked up. As Rick has said above, you'll actually see the temp move around a lot more.But I agree, the Tdis do cope well with Oz temps, at least until you switch the A/C on. Paul Ahh may help then that i don't have A/C Quote Link to comment Share on other sites More sharing options...
jules Posted March 31, 2006 Share Posted March 31, 2006 Ahh may help then that i don't have A/C What are you worried about you have dash flaps Quote Link to comment Share on other sites More sharing options...
reads90 Posted April 1, 2006 Share Posted April 1, 2006 What are you worried about you have dash flaps Yeah and i had a few 110 defenders say to me they wish they could swap the a/c for the dash flaps. They seem to work fine and keep the dust out which is good for a soft top Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 1, 2006 Author Share Posted April 1, 2006 Just to get my thread back from the hi-jackers:- Nige, Diff - There's a few numbers on the flats of the thermal switch. 100' - 90' ELTH 05 98 264108 The unit is Intermotor. Location is bottom hose from the radiator back to the pump. pic:- It looks to me as though the fan comes on at 100 dg and goes off at 95 dg, so too hot by about 10 dg? From cold and on fast idle, catflaps engine has to run for more than an hour before the fan cuts in. It runs for around 20-secs and then stops for around 3-minutes before starting again. Les. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted April 1, 2006 Share Posted April 1, 2006 Is that one of them Scrap Iron switch housing things? Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 1, 2006 Author Share Posted April 1, 2006 Nope, it's an 'L-Eng' thermal fan switch housing, a vast improvement on a similar model you can buy for less elsewhere. The Aircraft Grade alloy housing is 7-thou thinner, and therefore vastly superior to similar tat. Available in a better quality blue or a rather disgusting shade of red/orange for a tenner more. Les. Quote Link to comment Share on other sites More sharing options...
western Posted April 1, 2006 Share Posted April 1, 2006 Is that one of them Scrap Iron switch housing things? SimonR will be after you, it's one of his switch housing OOPS, no it's not as Les has replied above Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted April 1, 2006 Share Posted April 1, 2006 Sir Les I will have a peek and consult me manuals for yer tommorrow Me Lord Nige Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted April 2, 2006 Share Posted April 2, 2006 Yeah and i had a few 110 defenders say to me they wish they could swap the a/c for the dash flaps. They seem to work fine and keep the dust out which is good for a soft top Les, Can't find the match for the switch number, had a good look. BUT. If you can tell me 1. the thread size into the rad, normally they are M14, M22, M16, (most common is M14) 2. The range for on / Off your looking for Then I will look up the part number and manufactuer for the one you wnat ! Nige Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 2, 2006 Author Share Posted April 2, 2006 Thanks Nige. Thread size is M22 x 1.5 Not sure about temp range - I suppose 87 on and 82/83 off ? Blade fitting as I already have them. Les. Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted April 2, 2006 Share Posted April 2, 2006 Thanks Nige.Thread size is M22 x 1.5 Not sure about temp range - I suppose 87 on and 82/83 off ? Blade fitting as I already have them. Les. On it now, post you part nos and options later tonight Nige Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted April 2, 2006 Share Posted April 2, 2006 K Here we go Tell me which you fancy, and I'll cross ref to car etc SNB717 92-82 SNB722 100-95 SNB713 85-80 SNB718 87-77 SNB723 92 87 SNB714 82 67 SNB719 95-85 SNB724 92-87 SNB720 95-90 SNB725 92-87 SNB721 92-87 SNB727 85-75 SNB752 87-77 Nige Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted April 3, 2006 Share Posted April 3, 2006 WwwwwwwoooooooooooooooooooooooooooooooooooooO Les, are you there 'Sir' ? Nige Quote Link to comment Share on other sites More sharing options...
Bull Bar Cowboy Posted April 3, 2006 Share Posted April 3, 2006 Les, These are the intermotor switches listed in the intermotor parts book …………… I use one of the twin switches to run two fans…..slow on the first switch and fast on the second……. Part number ……… spanner size……….Size n pitch …………temp on/off 50100 29 M22 x 1.5 82-68 50101 29 M22 x 1.5 84-79/88-83 50250 29 M22 x 1.5 86-76 50012 29 M22 x 1.5 86-77 50090 29 M22 x 1.5 86-81 50120 29 M22 x 1.5 88-79 50295 29 M22 x 1.5 88-79 50296 29 M22 x 1.5 88-79/110-102 50271 29 M22 x 1.5 88-83 50272 29 M22 x 1.5 88-83 50275 29 M22 x 1.5 88-83 50217 29 M22 x 1.5 88-83/92-87 50091 29 M22 x 1.5 88-83/92-87 50212 29 M22 x 1.5 88-83/92-87 50213 29 M22 x 1.5 88-83/92-87 50216 29 M22 x 1.5 88-83/92-87 50221 29 M22 x 1.5 88-83/92-87 50219 29 M22 x 1.5 88-83/92-97 50240 29 M22 x 1.5 90-80 50110 29 M22 x 1.5 92-82 50111 29 M22 x 1.5 92-82 50112 29 M22 x 1.5 92-82 50113 29 M22 x 1.5 92-82/95-80 50218 29 M22 x 1.5 92-82/97-92 50170 29 M22 x 1.5 92-87 50200 29 M22 x 1.5 92-87 50210 29 M22 x 1.5 92-87 50211 29 M22 x 1.5 92-87 50220 29 M22 x 1.5 92-87 50230 29 M22 x 1.5 92-87 50231 29 M22 x 1.5 92-87 50235 29 M22 x 1.5 92-87 50260 29 M22 x 1.5 92-87 50270 29 M22 x 1.5 92-87 50280 29 M22 x 1.5 92-87 50281 29 M22 x 1.5 92-87 50285 29 M22 x 1.5 92-87 50290 29 M22 x 1.5 92-87 50215 29 M22 x 1.5 92-87/97-92 50011 29 M22 x 1.5 93-88 50102 29 M22 x 1.5 93-88/97-92 50035 29 M22 x 1.5 95-85/102-92 50130 29 M22 x 1.5 95-86 50030 29 M22 x 1.5 95-90 50033 29 M22 x 1.5 95-90 50061 29 M22 x 1.5 95-90 50062 29 M22 x 1.5 95-90 50160 29 M22 x 1.5 95-90 50092 29 M22 x 1.5 95-90/100-95 50174 29 M22 x 1.5 95-90/100-95 50104 29 M22 x 1.5 97-92 50282 29 M22 x 1.5 97-92 50103 29 M22 x 1.5 97-92/101 -96 50214 29 M22 x 1.5 97-92/102-97 50190 29 M22 x 1.5 100-95 50195 29 M22 x 1.5 100-95 50196 29 M22 x 1.5 100-95 50197 29 M22 x 1.5 100-95 50198 29 M22 x 1.5 100-95/110-105 50000 29 M22 x 1.5 103-98 50013 29 M22 x 1.5 103-98 50014 29 M22 x 1.5 103-98 50191 29 M22 x 1.5 120-115 Ian Quote Link to comment Share on other sites More sharing options...
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