ande84 Posted August 4, 2008 Share Posted August 4, 2008 Hi Bought an X-Eng fan switch of Simon (Thanks Simon). I was wondering what would be the best fan to get from the scrap yard to put on. I am going to be putting a 200tdi out of a disco in to a TD 90. Do i need two fans a low temp and a high temp one, or could i just use one. If i used one fan i would also like to have an over heat warning lamp and a fans running lamp so i can see when the fan is working. Also could anyone recommend any good warning lamps to use. Thanks Andy Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted August 4, 2008 Share Posted August 4, 2008 One that fits Take your tape measure and seek out a decent looking fan that's as big as possible whilst fitting in the space available and looks like it wouldn't be too much hassle to mount. Quote Link to comment Share on other sites More sharing options...
Big_John Posted August 4, 2008 Share Posted August 4, 2008 Andy, Mondeo fans seem to be popular. I think some are available in twin-speed, so you can wire both outputs from the switch. Have a search through on here and see what you can find (quite a few people have done it), also in the tech archive here or elswhere here Quote Link to comment Share on other sites More sharing options...
ande84 Posted August 4, 2008 Author Share Posted August 4, 2008 Thanks for that. Just one more question how can you tell if a fan is twin speed. Thanks Andy Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted August 4, 2008 Share Posted August 4, 2008 I'm using a Mondeo Diesel fan, job done Mo Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 4, 2008 Share Posted August 4, 2008 Mondeo fan on my 200tdi rad. Just one more question how can you tell if a fan is twin speed. You need to be careful, typically you would look for three connections, fast, slow and ground, but some fans (mine as a case in point) have a sense coil that gives an output when the fan is running, you don't want to put +12v on that, it's doesn't do much good. Look carefully at the connection socket, it may well be labelled. Quote Link to comment Share on other sites More sharing options...
garymorris Posted August 5, 2008 Share Posted August 5, 2008 Luke ,is your Mondeo fan single or twin speed then ? Cheers Gary Quote Link to comment Share on other sites More sharing options...
stuntman Posted August 5, 2008 Share Posted August 5, 2008 the volvo 9 series has a very good fan with twin speed inputs Quote Link to comment Share on other sites More sharing options...
ande84 Posted August 5, 2008 Author Share Posted August 5, 2008 Thanks very much for this info. I think i will be going for a Mondeo fan when i get round to putting in my 200tdi. Thanks again Andy Quote Link to comment Share on other sites More sharing options...
garymorris Posted August 5, 2008 Share Posted August 5, 2008 Luke , I have picked up a mondeo fan today from the breakers the same as yours , what is in the bottom left corner of your picture as it's missing /been removed off mine Anything to worry about Thanks Gary Quote Link to comment Share on other sites More sharing options...
zulublue Posted August 5, 2008 Share Posted August 5, 2008 Hi Andy I used a Mondeo fan also but I would not worry too much about twin speed as mines been fitted for over 6 months and the fan has never come on, I did put the thermostat on the output side of the rad, has anyone else had this or have I messed up my wiring. Defender 90 with disco (block only) defender housings, my temp guage sits just at the end of the line before the black section thats in front of the red band. Any advice welcome Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 5, 2008 Share Posted August 5, 2008 I have picked up a mondeo fan today from the breakers the same as yours , what is in the bottom left corner of your picture as it's missing /been removed off mine Anything to worry about IIRC correctly, it's a resistor, probably used for dual speed control. nothing to worry about, I'd just blank off the hole. I've got the switch in the radiator output, best place for it IMHO. Quote Link to comment Share on other sites More sharing options...
zulublue Posted August 5, 2008 Share Posted August 5, 2008 Can anyone with a good knowledge of electrics advise which is the best way to wire the X-Eng thermostat up, I have wired it the first way, but wonder if the second way is better as not to push the load through the thermostat. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 5, 2008 Share Posted August 5, 2008 Your second diagram is better, in that the thermostatic switch isn't taking the full fan load, however, that circuit does not give you the option to over-ride the fan to the on position. I would use (have used) an on-off-on switch, with one 'on' feed to the relay going direct, and the other 'on' feed going through the temp switch, that way you have the option to have the fan permanently on, off, or controlled by the thermostat. You need to add a fuse to the main supply cable, too. Quote Link to comment Share on other sites More sharing options...
zulublue Posted August 5, 2008 Share Posted August 5, 2008 Thanks Luke, damn good idea. I take it your thermostat kicks in ok then? Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 5, 2008 Share Posted August 5, 2008 It switches at the correct temperature, yes. It only comes on when the 90 has been working hard, with low air flow over the radiator. Quote Link to comment Share on other sites More sharing options...
garymorris Posted August 7, 2008 Share Posted August 7, 2008 Cheers Luke , I fitted the X eng sender last night so will begin making brackets to hold the fan on over the weekend Quote Link to comment Share on other sites More sharing options...
Mr Bean Posted August 8, 2008 Share Posted August 8, 2008 Just out of info the Vauxhall Calibra V6 models all have twin speed fans. Not sure on mountings though but i could measure one up as its only on the drive. Quote Link to comment Share on other sites More sharing options...
zulublue Posted August 10, 2008 Share Posted August 10, 2008 Re-wired it up today as per the lower diagram, problem is that the fan came on straight away when the engine was stone cold??? moved the wire to the higher temp sender and it stopped off, I think there is a fault on the temp sender lower output. I put a signal tester across the terminal and got a small reading on the lower terminal and nothing on the higher range. I will have to give Simon a bell Quote Link to comment Share on other sites More sharing options...
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