kevin Posted May 29, 2007 Share Posted May 29, 2007 Please can anybody tell me the differance in temp sender switch, i have just swopped over from a 2.5t to a 200tdi engine in my1987 110 all is well but the temp goes nearly into the red on a long tickover, i cannot try it on the road yet and i no longer have the old engine but would the old 2.5t switch cure this thanks Kevin Quote Link to comment Share on other sites More sharing options...
LR90 Posted May 29, 2007 Share Posted May 29, 2007 Like you I've sure my old gauges read hotter with the 200 sender (though not into the red I'm pleased to say) IIRC the earlier sender had a different thread so I've ended up just living with it but would be interested in others views. Quote Link to comment Share on other sites More sharing options...
kevin Posted May 29, 2007 Author Share Posted May 29, 2007 Like you I've sure my old gauges read hotter with the 200 sender (though not into the red I'm pleased to say)IIRC the earlier sender had a different thread so I've ended up just living with it but would be interested in others views. Just to add i had the rad recored it has a good flow of water and the thermostat was replaced. Quote Link to comment Share on other sites More sharing options...
Ivan Posted May 30, 2007 Share Posted May 30, 2007 Kevin I had similar problems when I fitted a 300Tdi to my 2.5TD. In the end I just bought a new guage and matched sender from Racetech. I tried a number of different senders and none of them worked. HTH Ivan Quote Link to comment Share on other sites More sharing options...
Lars L Posted May 30, 2007 Share Posted May 30, 2007 I bought a gas flowed head for my 2,5 NAD from Turner. The sender on this head had the same threads as my newly installed 200 Tdi. And showed what it should on the dash. Maybe you could call them and ask if it's sold separately? Quote Link to comment Share on other sites More sharing options...
DSN Posted May 30, 2007 Share Posted May 30, 2007 I fitted 200tdi Disco engine to my old 2.5td and as mentioned, the old TD sender would not fit. Sure enough the tdi sender then meant the gauge was almost off scale at normal running temp. In the end, a mate who runs a garage did tap a new thread in the thermostat housing and screwed in my old TD sender with a bit of thread lock. No leaks and obviously perfect readings again. It was a little dubious as the size is similar so not sure how the rethreading would work. Other options were to put TD sender in through top of thermostat housing as a flat depressed area there. Not sure if it would have worked. Other one people have mentioned is to drill out the centre of the tdi sender so you just end up with the thread and a bit of material then try and screw the TD sender into this. In effect use the tdi thread as a convertor. Anyway several options available. Hope you find something that works for you. Quote Link to comment Share on other sites More sharing options...
kevin Posted May 30, 2007 Author Share Posted May 30, 2007 I fitted 200tdi Disco engine to my old 2.5td and as mentioned, the old TD sender would not fit.Sure enough the tdi sender then meant the gauge was almost off scale at normal running temp. In the end, a mate who runs a garage did tap a new thread in the thermostat housing and screwed in my old TD sender with a bit of thread lock. No leaks and obviously perfect readings again. It was a little dubious as the size is similar so not sure how the rethreading would work. Other options were to put TD sender in through top of thermostat housing as a flat depressed area there. Not sure if it would have worked. Other one people have mentioned is to drill out the centre of the tdi sender so you just end up with the thread and a bit of material then try and screw the TD sender into this. In effect use the tdi thread as a convertor. Anyway several options available. Hope you find something that works for you. So what you are saying is that the sender will more than likely be the cause of my overheating (thanks) i think i will try and cut a new thread. ps has anybody tried a smiths stock sender/gauge package Thanks Kevin Quote Link to comment Share on other sites More sharing options...
JST Posted May 30, 2007 Share Posted May 30, 2007 Dan shouldn't that first word be We? just fit the td sender as DSN says or get a tdi guage or buy new guage and sender that are matched. i very much doubt the engine is overheating. Quote Link to comment Share on other sites More sharing options...
western Posted May 30, 2007 Share Posted May 30, 2007 Should work, did on my '89 ex-2.5TD 110 when the 200Tdi was fitted [new engine] gauge [original] has always worked correctly. Try 2.5TD & 2.5N/A temp sender PRC6663 hth Quote Link to comment Share on other sites More sharing options...
LR90 Posted May 30, 2007 Share Posted May 30, 2007 Ralph, are there any different part numbers for the temp gauges? There seem to be a range of sensors (I have a few on the shelf now) but as has been said above the threads are different so its not a quick job to just swap them over to try. If the temp gauge has not changed from early 90 to 200 Defender then messing with sensors probably won't help anyway but different gauges would support the experiences some seem to have with high readings after retro fitting a TDi engine. Quote Link to comment Share on other sites More sharing options...
western Posted May 30, 2007 Share Posted May 30, 2007 Done some part number hunting & found this info hope it helps 2.5n/a diesel ---- PRC2505 upto April 1989 with adaptor ERC9432 & Washer 10802070 then PRC6663 from April 1989 with adaptor/washer as above 2.5TD ------------- PRC2505 upto engine 19J25183C then PRC6663 from engine 19J25184C both need adaptor/washer as above 200Tdi [Defender type] ------------- PRC8593 300Tdi -------------------- AMR1425 [green] or AMR3321 [black] water temp gauge PRC7311 upto chassis number JA916595 ---------- from ---------------- JA916596 to KA928139 AMR2631 from --------------- KA928140 all from my paper parts cat 110 from 1987 onwards [does not inc Td5] my 110 ex-2.5TD uses PRC7311 [original gauge as bulit in 1989] works fine with the 200Tdi sender PRC8593 Quote Link to comment Share on other sites More sharing options...
LR90 Posted May 30, 2007 Share Posted May 30, 2007 Nice one Ralph So if I understand that right the PRC7311 was used up to about 300TDi (so is almost certainly what I have in my '86 90) and the senders (for 2.25, 2.5 and 200s) should all interwork with this gauge. I have the same setup as you but have always felt it read on the high side. Maybe I should go back to not worrying about it (and get the top hose fixed). Odd that others have had had success correcting high readings by changing the sender unit. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted May 30, 2007 Share Posted May 30, 2007 I just put in a 200TDI replacing a 2.5NA and the 200TDI sender works properly with the old gauge. There should not be a difference. The 200TDI retrofit manual says nothing about a need to change the gauge. Is it a Defender 200TDI or a Disco 200TDI?? Quote Link to comment Share on other sites More sharing options...
LR90 Posted May 30, 2007 Share Posted May 30, 2007 Good point. I'm on my second defender engines in mine now and AFAIK Ralph's in genuine (factory retrofit kit even IIRC). Quote Link to comment Share on other sites More sharing options...
western Posted May 30, 2007 Share Posted May 30, 2007 Good point. I'm on my second defender engines in mine now and AFAIK Ralph's is genuine (factory retrofit kit even IIRC). Yep, spot on there Trev Further Discovery 200Tdi engines have these depending on it's home territory Gulf states PRC9942 [no colour code] all other territories PRC8001 [orange] or PRC9917 [green] Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted May 30, 2007 Share Posted May 30, 2007 Ralph, what do you know about TD5 temp gauges and their sender set ups ? Mo Quote Link to comment Share on other sites More sharing options...
western Posted May 31, 2007 Share Posted May 31, 2007 EPC only shows 1 temperature sensor for Td5 engines part number ERR2081, I believe this feeds a signal to the engine or body ecu which then drives the temp gauge, hth Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted May 31, 2007 Share Posted May 31, 2007 Many thanks Ralph, time for some experimentation, methinks Mo Quote Link to comment Share on other sites More sharing options...
western Posted May 31, 2007 Share Posted May 31, 2007 Won't be any good in your 300Tdi though, I listed those above. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted May 31, 2007 Share Posted May 31, 2007 Nothing ventured Ralph The back of the gauge has 3 spades, +, - and ground. I'll connect it up and see what happens Mo Quote Link to comment Share on other sites More sharing options...
western Posted May 31, 2007 Share Posted May 31, 2007 I'll wait for the 'BANG' as the gauge explodes Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted August 13, 2007 Share Posted August 13, 2007 Thought I'd tag onto the end of this rather than start a new thread - I'm trying to get the right sender & gauge for my 109 - V8 EFi engine and defender gauge. I have a gauge here from an early 110 which is PRC3106 - can anyone shed any light on it? Quote Link to comment Share on other sites More sharing options...
western Posted August 13, 2007 Share Posted August 13, 2007 PRC3106 must be from a 2.25 [aka2.3] litre 90 or 110, can't find it in my 1987 on 110 parts book or EPC, just googled it & found the number described as a water temp gauge for 90/110. suspect you need the sender for the 2.25 engine in my list above or PRC2506 used in carb V8 in 90/110 hth Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted August 13, 2007 Share Posted August 13, 2007 Cheers Ralph! Quote Link to comment Share on other sites More sharing options...
western Posted August 13, 2007 Share Posted August 13, 2007 let us know if it works, it'll be good to add to the info in this thread. Quote Link to comment Share on other sites More sharing options...
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