jack54turbo Posted October 6, 2008 Share Posted October 6, 2008 Just bought a 110 (K reg) fitted with a disco 200tdi engine. Runs well, but temp gauge quicly moves up to rhs of white band (but not quite into red). Electric fan then cuts in and runs most of time whilst engine running. Radiator and water pump appear OK. Have noted that has 88 thermostat (correct according to LR). Has also got electric fan (Bosch) on relay and thermostatic switch fitted in radiator top hose - not sure of source of switch, but has '90' stamped on it.Understand that incorrect temp guage readings are common on disco engines conversions, but more concerned re elec fan running all the time. If '90' relates to temp when switch activates - is this not too close to 88 when thermostat opens? If so, where can I get another thermostatic switch? also can I get a suitable sender unit to match temp guage - think car was originally petrol as has choke pull under dash. thanks could be viscous(not sure on spelling) link jack Quote Link to comment Share on other sites More sharing options...
MJIbex Posted October 6, 2008 Share Posted October 6, 2008 I have the same problem. The needle sits at the end of the white bit/middle of the black bit. It's always been the same since I fitted the 200tdi. Since i fitted the 35s it seemed a bit higher so i replaced the rad, thermostat (with the standard disco 88deg), water pump, and replaced the 2.5D sender (which seems to fit the 200tdi fine) with a Steve Parker sender. The temperature indicated on the clock seems to rise if i put the lights or overide the electric fan on so i guess there might be a connected earth fault with the dash cluster but i haven't had time to look at that. I don't have a viscous fan but the X-fan switch in the bottom hose rarely ever switches the fan on. I don't think the head gasket is gone as it doesn't continualy rise and having the gas in the header sniffed with the blue liquid says no exhaust in the coolant. Any more ideas? I don't think the sniffers work particularly well on diesels, can't tell you why but thats what I've always been told. Mark Quote Link to comment Share on other sites More sharing options...
Yohann Posted February 3, 2009 Share Posted February 3, 2009 Hi - I am a newbie signing in with a question..... I have just transplanted the 200Tdi from my Defender 110 into my Ninety. The original sender (PRC8593) and the 88 degree thermostat (ERR2903) is now coupled to the old Ninety temp gauge (PRC7311). The reading is at the extreme right of the solid white band at normal operating temperature, even during light use. Is this the normal reading for this gauge? The engine does not seem to be overheating, but I worry that the needle does not sit bang upright in the middle of the gauge which is how it used to behave in the 110 (with the AMR2070 gauge). After reading many posts on the subject, I feel that PRC7311 is likely to read hotter with the 200TDi engine - reason: the thermostat on the Ninety's old 12J engine opens at 82 degrees, hence the gauge is likely to be calibrated to read "normal" at a lower temperature, whereas at the higher 88 degrees plus temperature of the 200Tdi it is bound to show as if overheating. Does this sound logical? Thanks. Quote Link to comment Share on other sites More sharing options...
western Posted February 3, 2009 Share Posted February 3, 2009 sounds logical. my '89 110 was a TD with the same gauge as yours after the 200Tdi was fitted the guage read the same as it did with the previous engine, check the earth connections on the back of the gauges are intact & tight. Quote Link to comment Share on other sites More sharing options...
western Posted February 3, 2009 Share Posted February 3, 2009 Car first registered december '09, Reckon you meant to type '89 [1989] as if it tried to be a Dec '09 it wouldn't be built yet Quote Link to comment Share on other sites More sharing options...
Marks 110 Posted February 6, 2009 Share Posted February 6, 2009 Reckon you meant to type '89 [1989] as if it tried to be a Dec '09 it wouldn't be built yet My temp gauge is also reading to the extreme right of the white band with original temp gauge and sender fitted although the original thermostat has been replaced. (200tdi 110) Rad was re-cored about three years ago and is in good condition too. When I first got the vehicle the temp stayed only a quarter of the way on the gauge but I can't quite remenber when the reading changed but I presume it was after fitting the new stat. I'm beginning to wonder whether the original thermostat was an 82 degree. The temp seems to be steady but it looks to be too close to the red for comfort. I'm wondering if its worth trying the 82 degree stat? Mark Quote Link to comment Share on other sites More sharing options...
jason110 Posted February 6, 2009 Share Posted February 6, 2009 sorry to hi-jack, but does the sender PRC8593 swap straight with the existing sender?? i have a disco 200tdi in my 110, with the high reading gauge nonsense! sorry to ask a dumb question thanks Quote Link to comment Share on other sites More sharing options...
zulublue Posted February 6, 2009 Share Posted February 6, 2009 I swapped my defender engine after I hydrolocked it to a disco unit, BUT I only used the block so the temp sender was the original one, on the old engine it sat at half way but on the new block it sits on the end of the white bar, never moves over it I have an X-Eng thermo switch placed in the lower output pipe which has never come on, so I guess the red is doing its job. I just found it strange that the same sender can give a different reading by just swapping the block. Quote Link to comment Share on other sites More sharing options...
Marks 110 Posted February 7, 2009 Share Posted February 7, 2009 I swapped my defender engine after I hydrolocked it to a disco unit, BUT I only used the block so the temp sender was the original one, on the old engine it sat at half way but on the new block it sits on the end of the white bar, never moves over it I have an X-Eng thermo switch placed in the lower output pipe which has never come on, so I guess the red is doing its job.I just found it strange that the same sender can give a different reading by just swapping the block. Could the coolant passageways have become restricted with corrosion or other debris? Did you use the same pump? Mark Quote Link to comment Share on other sites More sharing options...
soutie Posted February 7, 2009 Share Posted February 7, 2009 I had a similar problem last year with my 200tdi 110. I had replaced the radiator, water pump and thermostat and sender until Turbo charger leant me his heat sensor gun and we confirmed it was the gauge that had had it. I replaced it with a calibrated gauge and sensor and it now sits at 88 degrees what ever I do. Quote Link to comment Share on other sites More sharing options...
Marks 110 Posted February 8, 2009 Share Posted February 8, 2009 I had a similar problem last year with my 200tdi 110. I had replaced the radiator, water pump and thermostat and sender until Turbo charger leant me his heat sensor gun and we confirmed it was the gauge that had had it. I replaced it with a calibrated gauge and sensor and it now sits at 88 degrees what ever I do. Any idea where 88 degrees would register on the standard gauge? Quote Link to comment Share on other sites More sharing options...
western Posted February 8, 2009 Share Posted February 8, 2009 on mine it sits just to left of the vertical. Quote Link to comment Share on other sites More sharing options...
Marks 110 Posted February 8, 2009 Share Posted February 8, 2009 on mine it sits just to left of the vertical. Will check engine temp with my infra red thermometer next time I'm out in the 110. I guess I just aim it next to the temp sender? Will be interesting to see what the temp is and how it corresponds on the gauge. Mark Quote Link to comment Share on other sites More sharing options...
zulublue Posted February 8, 2009 Share Posted February 8, 2009 Could the coolant passageways have become restricted with corrosion or other debris? Did you use the same pump?Mark Hi Mark, yes same everything. Quote Link to comment Share on other sites More sharing options...
cieranc Posted February 8, 2009 Share Posted February 8, 2009 I found that the standard LandRover gauge was, well, vague, to say the least. My 110 wouldn't budge off 88 deg even when loaded to the hilt (overloaded) pulling a three ton plant trailer. I fitted a VDO gauge from Merlin Motorsport, and the sender to suit (5/8ths UNC I think), and now I can see the gauge move a degree or two at a time. The gauge comes steadily up from cold, to 92 deg. You can 'see' the stat opening and the temp drops to just under 90*. If I work it hard you can see the gauge creep up to 95, where the fan cuts in, then drop back down to 88*. Really made a world of difference to mine, I actually believe what the gauge is saying now Quote Link to comment Share on other sites More sharing options...
Yohann Posted February 13, 2009 Share Posted February 13, 2009 Hi everyone, Found this interesting faq on testing various types of temp gauges - http://www.autometer.com/tech_faq.aspx?sid=1 Also, here is the gauge I intend to buy - http://www.autometer.com/cat_gaugedetail.a...ch&gid=2825 The kit includes a 1/8 npt sender plus 1/2" npt and 3/8" npt adapaters - can anyone tell me whether one of these sizes will match the sender receptor on my standard 200tdi cylinder head? Thanks!! Quote Link to comment Share on other sites More sharing options...
Yohann Posted February 23, 2009 Share Posted February 23, 2009 I found that the standard LandRover gauge was, well, vague, to say the least. My 110 wouldn't budge off 88 deg even when loaded to the hilt (overloaded) pulling a three ton plant trailer. I fitted a VDO gauge from Merlin Motorsport, and the sender to suit (5/8ths UNC I think), and now I can see the gauge move a degree or two at a time. The gauge comes steadily up from cold, to 92 deg. You can 'see' the stat opening and the temp drops to just under 90*. If I work it hard you can see the gauge creep up to 95, where the fan cuts in, then drop back down to 88*. Really made a world of difference to mine, I actually believe what the gauge is saying now Hi All I finally fitted an OEM gauge to my 200tdi Ninety - the new gauge actually indicates temperature in centigrade. It ame with its own sender which was fitted by cannibalising the original sender. Just like cierenc, the temperature fluctuates between 91 and 95 - but never goes below 91. Appreciate everyone's opinion whether this range is "normal" for a 15 year old 200tdi which has never been opened up. Other ancillaries - pump, rad, etc. are in good shape - running in a tropical environment - Colombo / Sri Lanka might be making the difference? Thanks, folks! Quote Link to comment Share on other sites More sharing options...
ped Posted February 25, 2009 Share Posted February 25, 2009 as mentioned earlier swap sender and gauge for an aftermarket one which will take the guess work out of diagnosing if you have a overheating problem swap the fan switch for an x-eng one which has dual temp sensing ped Quote Link to comment Share on other sites More sharing options...
zulublue Posted February 25, 2009 Share Posted February 25, 2009 Decided to change the gauge and sender unit, I now know exactly what is happening and all for £18 Quote Link to comment Share on other sites More sharing options...
davelr4x4 Posted February 27, 2009 Share Posted February 27, 2009 Decided to change the gauge and sender unit, I now know exactly what is happening and all for £18 Nice digital gauges zulublue, where are they from? Regards, Dave. Quote Link to comment Share on other sites More sharing options...
zulublue Posted February 28, 2009 Share Posted February 28, 2009 Replied to your PM Dave Mark. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.