Ex Member Posted February 19, 2015 Share Posted February 19, 2015 One thing to keep in mind is that earth is through the engine, so making sure the engine grounds are good can be important. Quote Link to comment Share on other sites More sharing options...
Jocklandjohn Posted February 20, 2015 Share Posted February 20, 2015 One thing to keep in mind is that earth is through the engine, so making sure the engine grounds are good can be important. Cheers Red - I've cleaned and reattached the straps from gearbox to chassis, are there any other engine earth points I should be aware of? Quote Link to comment Share on other sites More sharing options...
Jocklandjohn Posted February 20, 2015 Share Posted February 20, 2015 The odd behaviour I've got is an oil pressure gauge that went off the scale suddenly when driving. The gauge is one of three (water temp and oil temp as well). All three are wired with a common Pos and Neg and have been installed and working perfectly for 6 years. The other two were unaffected and giving the appropriate readings. Of course I thought an overpressure in the engine was the problem. However I could replicate the problem with the engine switched off, cold from an overnight parked up and not run. That made me suspicious. So changed the sender. Same problem. Then renewed the wiring back to the gauge. Same problem. Then unbolted and cleaned and reattached the earth straps from gearbox to chassis. Same problem. I then thought the gauge might be defective. Replaced the gauge with a new one. Same problem! I then started poking about in the dash wiring and found that I could replicate the problem on the water temp gauge if I disconnected it from the the common earth it shares with the oil temp gauge. In fact putting the two oil pressure gauges on the kitchen table (well away from the 110!) and wiring a 9V battery to the Pos and Neg terminals on the gauges replicates the problem, with the needle pinging right off the scale in exactly the same manner. I've used three separate 12V batteries - wiring directly to them - two are connected to the vehicle - starter and aux batteries, both earthed to chassis, but the third battery I pulled out of the shed and connected directly using both the old wiring and new wiring directly to the pressure gauge so bypassing the entire vehicle system (except the connection to sender) and I'm still getting the problem. So I'm kind of stumped! Curiously the pressure gauge needle responded to the throttle, when I noted the problem and pulled over to the side of the road the needle went down to the normal position on the scale, but flicking the throttle made it go straight over past the 120PSI mark hard to the edge of the scale. So.......its either a massive overpressure - which doesn't seem to be the case (although I've not had a mechanical gauge on it yet - but the problem persisting with the engine cold and switched off leads me away from this) so...thinking as I'm typing here.....might it be an alternator connection problem? Whatever it is its got me baffled! And I'm on the verge of buying a mechanical gauge and fitting that, but I really need to find out what was causing the issue in case it's going to affect any other aspect of the electrics because I ignored it. Quote Link to comment Share on other sites More sharing options...
Keeper96 Posted March 6, 2015 Author Share Posted March 6, 2015 Update... After changing the thermostat and the guage deciding to just sit inbetween the red and white sections I decided yo remove the thermostat all together yo see if KT was maybe the temp sender at fault and now the guage just sits barely into the bottom of the white which would signal to me a dodge thermostat? So does anyone have the part number for the correct part as the garage I dealt with is adamant they gave me the right part even though its different from the one I took out originally. Thanks Jamie Quote Link to comment Share on other sites More sharing options...
western Posted March 6, 2015 Share Posted March 6, 2015 LR part number 602687 = 82 degree thermostat ------------------ ETC4761 = 74 degree stat normal UK fit is 82 degree [as a comparable engine 200tdi in UK uses a 88 degree] mine always runs just left of vertical Quote Link to comment Share on other sites More sharing options...
Keeper96 Posted March 7, 2015 Author Share Posted March 7, 2015 Thanks for thatThe thermostat the garage gave me was 88c so I'm guessing 200tdi which would explain why it didn't work in my engine?I'll give him the part number to get this sorted.CheersJamie Quote Link to comment Share on other sites More sharing options...
western Posted March 7, 2015 Share Posted March 7, 2015 my 110 used to be a TD, with a 82 stat, IIRC it used to sit about vertical when up to full working temp. with a 88 stat it would read a bit more, not less. Quote Link to comment Share on other sites More sharing options...
Keeper96 Posted March 8, 2015 Author Share Posted March 8, 2015 Yeah my old stat used to sit roughly vertical when it was working. now it sits just in between the red and white with the 88c thermostat in. I'll be in the garage this week to try and get this sorted out. Cheers Jamie Quote Link to comment Share on other sites More sharing options...
western Posted March 8, 2015 Share Posted March 8, 2015 another 82 degree stat should sort that out, the standard temp gauge isn't very accurate. Quote Link to comment Share on other sites More sharing options...
Keeper96 Posted March 8, 2015 Author Share Posted March 8, 2015 Cheers western I'll let you know what happens Quote Link to comment Share on other sites More sharing options...
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