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1st September 2012, 14:26 | #1 |
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MG ZT+ 1.8 turbo 160 Join Date: Apr 2012
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running temperatures
I just wanted to know what temperature the fan should be cutting in on my 1.8t just not sure.
also I get a little whiff of coolant every now and again but im not losing any coolant???? hope its not gonna cost too much
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1st September 2012, 17:22 | #2 |
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i have the same smell of coolent to now and agin and not looseing any, my fan cuts in at 110-115c
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1st September 2012, 17:35 | #3 | |
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It could also be a later 2 speed where the resistor has failed. To check to see if you have a later 2 speed look through the front grill at the cooling fan, at the 2 0'clock position you should see a silver resistor on the later fan. Low speed fan test is : start car, select demist in the cab. go to front of car fan should be running. If not you need to get it sorted If you are checking fan operation via obd engine temp them low speed fan on the 1.8 is on at 106 off at 100 (ish) when the engine is running IIRC Simon (sd1too) may have the exact figures to hand
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1st September 2012, 17:53 | #4 |
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yeah i know my low speed isnt working, soon to be fixed though, what temp is the slow speed ment to come in at 100c?
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1st September 2012, 18:43 | #5 |
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when i put the demist on the fan kicks in after about 5 seconds then goes off after ten seconds then comes back on again after 10 seconds. it keeps repeating. is this normal??
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1st September 2012, 19:14 | #6 | |
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From the forum archive.
1.8 Engine Running: Between: 98°C and 104°C = Low fan speed Between 105°C and 112°C = High fan speed The ECU switches both cooling fan relays off if the temp. sensor registers a temperature of 98°C or lower. 1.8 Engine Stopped: Above 112°C = High speed (Heat soak/engine off only) The cooling fan motor is now able to operate at high speed until the temp. sensor registers a temperature of below 112°C. Quote:
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1st September 2012, 19:17 | #7 | |
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1st September 2012, 19:19 | #8 |
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Change Resistor if it has one
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1st September 2012, 20:44 | #9 | |
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2nd September 2012, 08:30 | #10 | |
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MG Rover fan data
Yes, thanks Dave. There is no specific data given for the 1.8 Turbo, so here are MG Rover's figures for the 1.8 normally aspirated:
Slow speed: on at 104, off at 98. Fast speed: on at 112, off at 106 (engine running). When the engine stops, for 300 seconds before the ECU powers down the fan will run at high speed if the coolant is above 108 degrees. It will turn off at 104 degrees, and run for a maximum of 5 minutes. Please note: Quote:
MG Rover data for the diesel with 3 speed fan system (no data is given for the 2 speed resistor system): Slow speed: on at 100, off at 98. Medium speed: on at 106, off at 102. Fast speed: on at 112, off at 110. Another section of the manual gives the 'on' temperature as 119! I assume this is a misprint. There is no mention of any fan operation when the diesel engine is stopped. Simon.
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