Loud Fan/Humming Noise After Engine's Off
2nd Gear
Joined: Jan 2013
Posts: 135
Likes: 0
From: Bay Area, CA
Since you're getting that far in there and most of those steps are in the same spot, just do them all and save the repeated trips. Its most likely the temp sensor and since you're so far in with coolant drained, do the water pump also. Make it a day job and get your MINI running instead of a month job looking st the same issue and risk blowing a head gasket.
So I have the same cooling fan issue mentioned here. Every time I turn off the car, no matter how it was driven or the ambient temperature, the cooling fan comes on for maybe 3-4 minutes after I shut the car off.
I thought it was the R3 relay or the fan assembly. Replaced both. No change, fan still runs for 3-4 minutes after shutting the car off. Even if it's 35 degrees outside.
So... any ideas? This didn't happen earlier in the car's life (it's an '05 with 114,000 miles). Must have started around 90k miles. Is it a thermostat issue? Some other sensor?
I thought it was the R3 relay or the fan assembly. Replaced both. No change, fan still runs for 3-4 minutes after shutting the car off. Even if it's 35 degrees outside.
So... any ideas? This didn't happen earlier in the car's life (it's an '05 with 114,000 miles). Must have started around 90k miles. Is it a thermostat issue? Some other sensor?
This makes sense in a way. If I turn the car off and the engine is hot the temp shoots up by about 10 degrees or so (I never stick around long enough to see where it ends
). If it heats up enough, the fan should be triggered.
6th Gear
Joined: Aug 2009
Posts: 1,505
Likes: 25
I suppose my way ahead is this (obviously stopping if any step fixes it):
1) Bleed the coolant system.
2) Replace coolant temp sensor.
3) Replace thermostat.
4) Replace water pump.
Is that what you'd do? I'm trying to step up through what's easiest to do, most likely to be causing problem, and least costly.
1) Bleed the coolant system.
2) Replace coolant temp sensor.
3) Replace thermostat.
4) Replace water pump.
Is that what you'd do? I'm trying to step up through what's easiest to do, most likely to be causing problem, and least costly.
1st Gear
Joined: Mar 2004
Posts: 34
Likes: 0
From: Maryland
So I never got the time to do the troubleshooting and parts replacement myself, so I just sucked it up and paid a local garage to replace the thermostat, coolant temp sensor, and water pump. And it seems to have worked. No jet engine fan at shutdown, and the steady-state coolant temperature on the way home was in the mid 190s, after having been around 230 previously.
I don't know which of the parts fixed it, but I can't say care all that much as long as it keeps working!
I don't know which of the parts fixed it, but I can't say care all that much as long as it keeps working!
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