14Platoon Posted June 1, 2018 Share Posted June 1, 2018 (edited) Hello 1992 ex MOD Defender 90 any ideas what's the biggest aux cooling fan I can bolt on to the inside of the radiator, between the Rad and the cowling. Thanks Edited June 1, 2018 by 14Platoon Photo Quote Link to comment Share on other sites More sharing options...
timc1967 Posted June 1, 2018 Share Posted June 1, 2018 I don't know the answer but is yours 200TDI, like my civilian 1992 Defender? Mine never gets really hot, so just curious why you want extra cooling. None of my business really :-) Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 1, 2018 Share Posted June 1, 2018 About 16" is the usual, but size isn't everything - some fans move more air then others, and cowling etc. makes a big difference. As timc says - if it's a 200TDi it shouldn't need much cooling, if it does there might be some other problem. Hell, my 4.6 V8 only uses one of its two 12" fans 99.9% of the time. Freelander twin fans work nicely on a Defender rad if you haven't got an intercooler. Don't buy a Kenlowe, the fans are expensive for what they are and the stats don't survive first contact with moisture. Also, a mob armed with pitchforks will be along shortly for the big internet holy war of electric fan Vs engine-driven fan, just to make you aware. Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 1, 2018 Share Posted June 1, 2018 1 hour ago, FridgeFreezer said: Also, a mob armed with pitchforks will be along shortly for the big internet holy war of electric fan Vs engine-driven fan, just to make you aware. OI! Wot 'e said... I have an aftermarket fan on my 200Tdi (in a 109, so normal fan wouldn't fit. I think it's 14", if memory serves correctly, controlled by the very practical and reliable X-Eng X-Fan. It does the trick well enough, only running a short time whenever activated in hot conditions in the mountains (thin air makes the rad less effective, as well as the slopes working the engine hard). It has a small integral shroud which also acts as a mounting ring, with clip on feet which a screwed into the rad frame. I don't like the idea of those zip-ties through the rad, or having the cowl/ring in direct contact with the coolant tubes. I can't remember where I got it, but there is a photo on this page which may help you identify the type and see what I meant about the integral shroud and mountings: http://www.nickslandrover.co.uk/engine-ancilliaries/ Quote Link to comment Share on other sites More sharing options...
14Platoon Posted June 1, 2018 Author Share Posted June 1, 2018 It's a 2.5n/a when we had the hottest day in May I watched the temperature lift towards the red fairly quickly. I was motorway driving and up a steep long hill. Although it never reached the red I thought I would fit a fan for peace of mind. 1 Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 1, 2018 Share Posted June 1, 2018 1 hour ago, 14Platoon said: when we had the hottest day in May I watched the temperature lift towards the red fairly quickly. I was motorway driving and up a steep long hill. Although it never reached the red I thought I would fit a fan for peace of mind. So is your standard fan not working, radiator clogged, thermostat dodgy or what? Because a standard vehicle should not overheat - fitting an extra fan might just mask a simple problem that you're better off fixing 1st. 1 Quote Link to comment Share on other sites More sharing options...
Yostumpy Posted June 1, 2018 Share Posted June 1, 2018 (edited) ^^^WHS. my old 2.5 na never got hot, well only when the rad sprung a leak. The na rad is huuge! As it's full width. Start with rad flush. Temp going up with forward motion is indicative of a blocked rad / stat. Ramming the air thro it at 55mph should be ample cooling. "Huston! We have a problem! ps. Don't have a trendy 'rad muff' fitted do you? Took mine off months ago. Edited June 1, 2018 by Yostumpy Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 1, 2018 Share Posted June 1, 2018 My 12J would get hot under those circumstances in the 109 until I fitted a bigger exhaust; the 2.25 exhaust wasn't wide enough and strangled the engine. As soon as the new exhaust went on, the problem disappeared. So, it might be a problem with your exhaust, not the cooling system, so check both. But the standard set up should be more than enough if in good order. Quote Link to comment Share on other sites More sharing options...
14Platoon Posted June 1, 2018 Author Share Posted June 1, 2018 Hmm it didn't leap up to the red but did rise up to it, up the very steep long hill. It settled down a bit after the hill but was still nearing the last portion of the white, albeit still in the white. I don't have much faith in the gauges to be honest but a rad flush, reverse hose of it would make sense. Quote Link to comment Share on other sites More sharing options...
14Platoon Posted June 1, 2018 Author Share Posted June 1, 2018 1 hour ago, Yostumpy said: ^^^WHS. my old 2.5 na never got hot, well only when the rad sprung a leak. The na rad is huuge! As it's full width. Start with rad flush. Temp going up with forward motion is indicative of a blocked rad / stat. Ramming the air thro it at 55mph should be ample cooling. "Huston! We have a problem! ps. Don't have a trendy 'rad muff' fitted do you? Took mine off months ago. Nope no rad muff Quote Link to comment Share on other sites More sharing options...
DC_ Posted June 2, 2018 Share Posted June 2, 2018 Just pitching in with my 2.5na temp pattern. I did. Thermostat change at the start of the year as someone on here suggested my thermostat was maybe jammed open. After a saga with a snapped bolt in the thermostat housing 🙄 the new 88 thermo went in. So from my temp gauge only just getting onto the dial before, it now sits just before half way. If I’m going at warp speed (55mph) it goes up to a smidge before halfway. I know the gauges aren’t too accurate but heading up towards the red I’d get things checked out 👍 1 Quote Link to comment Share on other sites More sharing options...
miketomcat Posted June 2, 2018 Share Posted June 2, 2018 I have an electric fan on the 110 (disco 200tdi) it's on a manual switch. The only time I need it is when towing but I wouldn't be without a fan. On the ibex I've drilled and tapped the thermostat housing for a temperature switch. This seems to work really well (only driven it a few times as it's not registered yet). However I do need to change it for a higher temperature range as it cuts in to early. Mike 1 Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 2, 2018 Share Posted June 2, 2018 19 hours ago, 14Platoon said: Hmm it didn't leap up to the red but did rise up to it, up the very steep long hill. It settled down a bit after the hill but was still nearing the last portion of the white, albeit still in the white. Same as mine. 1 Quote Link to comment Share on other sites More sharing options...
14Platoon Posted June 4, 2018 Author Share Posted June 4, 2018 On 02/06/2018 at 1:03 PM, Snagger said: Same as mine. Are you still in Dubai? If so then yours is probably doing ok in that heat. Quote Link to comment Share on other sites More sharing options...
Roverdrive Posted June 4, 2018 Share Posted June 4, 2018 Don’t know if it affects Defenders as well as Discos, but I had similar symptoms when the radiator fins rotted out on the engine side of the radiator, so not visible from the front of the vehicle. Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 5, 2018 Share Posted June 5, 2018 21 hours ago, 14Platoon said: Are you still in Dubai? If so then yours is probably doing ok in that heat. I am, but the Rovers are still in the UK - can't have RHD vehicles registered here, so they'd be limited to a six month carnet. Most LRs do fine here in standard form. We did have one member of the local group struggle to understand his Defender's overheating issues, especially in the desert, but he refused to believe it was anything to do with him removing the fan "because some guys on the internet say Land Rovers are overcooled and don't need fans"... 2 Quote Link to comment Share on other sites More sharing options...
14Platoon Posted June 5, 2018 Author Share Posted June 5, 2018 Bought some Wynns rad flush. I’ll reverse flush with a hose first then give this a go. Might change th3 thermostat as well just for good measure. Quote Link to comment Share on other sites More sharing options...
Snagger Posted June 7, 2018 Share Posted June 7, 2018 Clean the heater matrix through too, not just to make it effective but to ensure no sediment in there moves elsewhere. 1 Quote Link to comment Share on other sites More sharing options...
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