Accuracy (and longevity) of S4 Thermo sensor, gauge and sending unit?
#1
Accuracy (and longevity) of S4 Thermo sensor, gauge and sending unit?
I recently installed my Rtek 2.1 and I have been taking temp logs (AFM, intake and coolant). Conventional wisdom has held that normal operating temp for an S4 TII is about 180-200*F this corresponds to a gauge reading of 1/4 to 1/3. Since my gauge has for the most part (auto x, and busted oil cooler line...) stayed in this range I never thought much of it.
However when I logged my temps on a 95* day and intake temps were 150*+ the gauge climed to 5/8 but the coolant temp never broke 180*!?! I confirmed this with subsequent logs , even heatsoaking for 20 min the temp (as per the Rtek...as per the thermosensor) only got to 181 at its highest. Something is amiss
If these readings are correct it seems to suggest that my thermostat never opens (>185*) This leads me to believe perhaps the thermosensor is going bad. or maybey the gauge/sending unit is going out? Has anyone ever had a thermosensor go out? what were the symptoms?
Thanks
***BTW the thermo sensor is on the back side of the waterpump housing and feeds the ecu. There temp gauge sending unit is in the driver side of the block next to the oil pressure sending unit .
However when I logged my temps on a 95* day and intake temps were 150*+ the gauge climed to 5/8 but the coolant temp never broke 180*!?! I confirmed this with subsequent logs , even heatsoaking for 20 min the temp (as per the Rtek...as per the thermosensor) only got to 181 at its highest. Something is amiss
If these readings are correct it seems to suggest that my thermostat never opens (>185*) This leads me to believe perhaps the thermosensor is going bad. or maybey the gauge/sending unit is going out? Has anyone ever had a thermosensor go out? what were the symptoms?
Thanks
***BTW the thermo sensor is on the back side of the waterpump housing and feeds the ecu. There temp gauge sending unit is in the driver side of the block next to the oil pressure sending unit .
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i would do some checking. the ECU sensor is quite accurate, but they do get slow as they age.
you can kind of go be color, new they are a pretty deep green, if yours is turned brown, or white, its probably older than you are
possible you have some cooling system issue too, like an air bubble or something
you can kind of go be color, new they are a pretty deep green, if yours is turned brown, or white, its probably older than you are
possible you have some cooling system issue too, like an air bubble or something
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#10
Well, the other night it got up to 203* , guess its working a little bit. Either way I ordrered anotherone cuz i found a loophole at the parts store that let me get em for 39 cents
The reason the temp got so high you ask? Apparently theres a leak at the driver side heater core inlet. I pulled the hose (which was replaced 2 years ago) and there were no cracks or holes. and I cleaned and checked the pipe, no holes. Pulled the cover for the heater core under the dash (btw LMMFAO at everyone who pulled a dash to get to the heater core) and all the pipes look brand new
The reason the temp got so high you ask? Apparently theres a leak at the driver side heater core inlet. I pulled the hose (which was replaced 2 years ago) and there were no cracks or holes. and I cleaned and checked the pipe, no holes. Pulled the cover for the heater core under the dash (btw LMMFAO at everyone who pulled a dash to get to the heater core) and all the pipes look brand new
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Well, the other night it got up to 203* , guess its working a little bit. Either way I ordrered anotherone cuz i found a loophole at the parts store that let me get em for 39 cents
The reason the temp got so high you ask? Apparently theres a leak at the driver side heater core inlet. I pulled the hose (which was replaced 2 years ago) and there were no cracks or holes. and I cleaned and checked the pipe, no holes. Pulled the cover for the heater core under the dash (btw LMMFAO at everyone who pulled a dash to get to the heater core) and all the pipes look brand new
The reason the temp got so high you ask? Apparently theres a leak at the driver side heater core inlet. I pulled the hose (which was replaced 2 years ago) and there were no cracks or holes. and I cleaned and checked the pipe, no holes. Pulled the cover for the heater core under the dash (btw LMMFAO at everyone who pulled a dash to get to the heater core) and all the pipes look brand new
#12
It just seems strange that that pipe wols start leaking now, its been untouched for 2 years (when I replaced the hose that goes to the block). ...I guess I might have bumped it when installing my FPR, bust sheesh, that was just a graze.
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True, I looked at the pipe and about an inch back its shaped more like a "D" than an "O" , so I took some water weld and filled in the area so that should no longer be a problem.
It just seems strange that that pipe wols start leaking now, its been untouched for 2 years (when I replaced the hose that goes to the block). ...I guess I might have bumped it when installing my FPR, bust sheesh, that was just a graze.
It just seems strange that that pipe wols start leaking now, its been untouched for 2 years (when I replaced the hose that goes to the block). ...I guess I might have bumped it when installing my FPR, bust sheesh, that was just a graze.
actually if its a factory hose, they get harder over time, so maybe it lost enough flexibility? aftermarket rubber gets soft
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