markev Posted December 5, 2010 Report Posted December 5, 2010 HI,I have a 95 mk1 galaxy 2.0 petrol have just changed the temp sender that does the gauge,was wondering if there is anymore temp senders/sensors on the car so i can replace,thanx Quote
sparky Paul Posted December 5, 2010 Report Posted December 5, 2010 There are two coolant temperature sensors, on the petrol models both are located on the thermostat housing. The bottom one is the temperature gauge sender, and the top one is the engine management system coolant temperature sensor (ETC sensor). Problem still not resolved? Quote
markev Posted December 5, 2010 Author Report Posted December 5, 2010 There are two coolant temperature sensors, on the petrol models both are located on the thermostat housing. The bottom one is the temperature gauge sender, and the top one is the engine management system coolant temperature sensor (ETC sensor). Problem still not resolved?no still head scratching......will they both have to be working to register on the gauge.I can see the bottom one the gauge sender but not the top one is it visible when looking or is it under the thermostat,thanks Quote
sparky Paul Posted December 5, 2010 Report Posted December 5, 2010 (edited) Temp. gauge works from bottom sender alone, other one is solely for the engine management - they are completely independant. Looking from the front of the engine, the coolant temperature sensor is at the rear of the thermostat housing near the top, the connector points towards the bulkhead. It could be obscured by pipework and/or wiring, you might have to have a feel around. The sensor on the underside of the thermostat housing is the temperature gauge sender, the connector points out towards the gearbox. Edited December 5, 2010 by sparky Paul Quote
sparky Paul Posted December 5, 2010 Report Posted December 5, 2010 (edited) If you are doubting the gauge reading, it is possible for your garage to plug a code reader into the diagnostic socket and read the engine coolant temperature from the other sensor to compare. Personally, as the temperature gauge rises to 'normal' as the engine temperature rises, I would guess that the gauge is correctly reporting a drop in engine temperature when you drive about. Did you change the thermostat? Edited December 5, 2010 by sparky Paul Quote
markev Posted December 5, 2010 Author Report Posted December 5, 2010 If you are doubting the gauge reading, it is possible for your garage to plug a code reader into the diagnostic socket and read the engine coolant temperature from the other sensor to compare. Personally, as the temperature gauge rises to 'normal' as the engine temperature rises, I would guess that the gauge is correctly reporting a drop in engine temperature when you drive about. Did you change the thermostat?yes replaced thermostat,still no luck,is it possible i have air in the system,could that be causing the problem Quote
sparky Paul Posted December 5, 2010 Report Posted December 5, 2010 Did you change the seal behind the thermostat too? Sometimes it disintegrates... Cooling system will push out any airlocks, it's pretty good in that respect. Any other strange symptoms? Any bubbling into the expansion bottle, pressurising of the cooling system, or anything else peculiar? Quote
markev Posted December 6, 2010 Author Report Posted December 6, 2010 Did you change the seal behind the thermostat too? Sometimes it disintegrates... Cooling system will push out any airlocks, it's pretty good in that respect. Any other strange symptoms? Any bubbling into the expansion bottle, pressurising of the cooling system, or anything else peculiar?no nothing like that but is the return pipee to the expansion tank only suppose to trickle back in Quote
sparky Paul Posted December 8, 2010 Report Posted December 8, 2010 no nothing like that but is the return pipee to the expansion tank only suppose to trickle back in Yes, you shouldn't see much, if anything coming out of the top pipe. Quote
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