tjolliffe Posted February 14, 2008 Share Posted February 14, 2008 Hi all, I know there are loads of posts and threads about this but I cant seem to find a straight answer. From what i've read to correct the problem I will need a whole new temp guage and sender. Can anyone give me a difinitive solution as to how they have done it? A link to the correct part would be great Cheers all! Quote Link to comment Share on other sites More sharing options...
western Posted February 14, 2008 Share Posted February 14, 2008 You can if you want a more accurate gauge VDO Vision gauges are good , or just use this idea Water temp sender for VDO gauge but it should work if you use the correct Defender sender unit PRC8593 or change the lower section of the thermostat housing & screw PRC8593 straight in. Quote Link to comment Share on other sites More sharing options...
Mr Bean Posted February 15, 2008 Share Posted February 15, 2008 you can also go for one of these http://www.vehicle-wiring-products.eu/VWP-...uges/gauges.php or if you like some cockpit bling http://www.demon-tweeks.co.uk/products/Pro...amp;tlgrp=RD004 Quote Link to comment Share on other sites More sharing options...
90 Mellis Posted February 15, 2008 Share Posted February 15, 2008 Hi I'm in the process of sorting the Temp Gauge out too. Problem i've found is most senders are 5/8" UNF (aftermarket & 2.5TD). The Disco sender is a odd size-Thread pitch measures 1mm and Dia approx 16mm, I can't find a Die this size (standard M16 metric fine is 1.5mm pitch). So............I've drilled the centre of the Disco sender out and soldered a 5/8 UNF Brass fitting to the back. This will enable me to use a standard aftermarket Capillary type Gauge/Sender. Hope this helps Mike Quote Link to comment Share on other sites More sharing options...
tjolliffe Posted February 15, 2008 Author Share Posted February 15, 2008 Thanks guys, cheers 90 Mellis, those sizes are a help, was thinking i mite do what western suggested and simply buy a 5/8 tap and then drill out the old sender, tap it, and inster the correct 2.5TD temp sender. Dont see why that wouldnt work , hopefully it will though, i'll let you know the outcome B) Quote Link to comment Share on other sites More sharing options...
90 Mellis Posted February 15, 2008 Share Posted February 15, 2008 Looked at that option-Won't work i'm afraid!! 5/8" is 15.875mm and the Standard Disco unit measures approx 16mm, therefore almost the same size. Difficult to explain but basically the senders are the same size in Dia just with different pitch threads!? You could get a smaller aftermarket sender and Drill/Tap the original but may not be calibrated to the gauge. Mike Quote Link to comment Share on other sites More sharing options...
tjolliffe Posted February 16, 2008 Author Share Posted February 16, 2008 Ah ok thanks mike, i wont try that then! Does anyone know what size and type of thread the disco sender is? I mite be able to buy an adaptor from somewhere specialist online.... Quote Link to comment Share on other sites More sharing options...
Lars L Posted February 16, 2008 Share Posted February 16, 2008 I have no idea regarding the thread size. What I do know however, is that the sender that came with the Turner cylinderhead for my 2,5 NAD also fitted on the Disco engine. The Turner head had the sender further front and in another hole than on the old standard head and there was a brass plug included to blank off the rearmost hole. Call Turner, maybe you can buy one. Quote Link to comment Share on other sites More sharing options...
diggerdog36! Posted February 23, 2008 Share Posted February 23, 2008 The thread size of the sender is M16x1. A perculiar size, but you will already know that if you are looking for an adapter. One option is to have an engineers make up an adapter, or take your old sender, drill it out and tap it to M10, this is almost identical to a 1/8th NPTF. Then stick one of those in!!! Quote Link to comment Share on other sites More sharing options...
tjolliffe Posted February 24, 2008 Author Share Posted February 24, 2008 Lars L, thanks for the tip! Just bought and fitted a sender from Turner, works a treat! Saves messing around buying other parts and senders, new guages ect. Thanks for the other advice tho every1 Cheers Quote Link to comment Share on other sites More sharing options...
Lars L Posted February 24, 2008 Share Posted February 24, 2008 Quote Link to comment Share on other sites More sharing options...
lrfarmer Posted February 25, 2008 Share Posted February 25, 2008 i just screwed the 90 sender into the disco thermostat housing. the thread is finer on the 90's but by turning it 1/2 forward 1/4 back 1/2 forward 1/4 back till it was in, dosen't leak and seem to work fine. may not be the right thing to have done but it's worked for me may have a problem if the sender go's wrong as it may not unscrew. Tim Quote Link to comment Share on other sites More sharing options...
Mr Bean Posted February 25, 2008 Share Posted February 25, 2008 As you said its not ideal but i gets you out the s**t if you ever need to. Quote Link to comment Share on other sites More sharing options...
jpkp0007 Posted August 12, 2008 Share Posted August 12, 2008 Anyone tell me what size thread adapter I need to fit a Defender 200TDi head? M16? 5/8 UNF? Other Quote Link to comment Share on other sites More sharing options...
fender1234 Posted August 12, 2008 Share Posted August 12, 2008 im not sure about any of the thread sizes but i bought this http://www.demon-tweeks.co.uk/products/Pro...pcode=LMATIM034 and it came with lots of adaptors to fit and good price to Quote Link to comment Share on other sites More sharing options...
jpkp0007 Posted August 12, 2008 Share Posted August 12, 2008 Aha. Almost snap. I've ordered this http://www.demon-tweeks.co.uk/products/Pro...pcode=STAST3107 with a UNF 5/8 but have no idea if it'll fit! Quote Link to comment Share on other sites More sharing options...
pist0nbr0ke Posted August 13, 2008 Share Posted August 13, 2008 having just put a 200tdi in mine, i swapped the sender out of the old 2.5na diesal and screwed it straight in on the 200tdi with noty probs. When the thermostate opens up it reads right in the middle of the guage, no probs at all!! Hope this muddies the water!! Neil Quote Link to comment Share on other sites More sharing options...
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