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Engine fan on at startup?
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- Senior Member
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Engine fan on at startup?
Maybe Z4C has started doing something funny. Every time I start the engine engine fan comes on, on full.
If I restart the engine it turns off and it’s fine. No EML light.
Any ideas?
If I restart the engine it turns off and it’s fine. No EML light.
Any ideas?
2007 3.0si Coupe, LED interior lights, Stubby, ZHP, AC Schnitzers, 15mm spacers on the rear. 1993 Modified Pre-Cat TVR Griffith, Ducati Monster 821, MV Agusta F3 675
- Smartbear
- Lifer
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Engine fan on at startup?
Hi, my si did that & its the Cars way of trying to compensate for a failing water pump! I’d order one now and stop using the car before you flambé the magnesium engine
Get the codes read to be sure but that’s a mirror image of my cars behaviour, I had no warning lights up but stored codes of “implausible pump speed” were logged.
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
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Engine fan on at startup?
Balls! Will order one on Monday and see if I can get it fitted ASAP!
Only bad thing is I’m currently 150 miles from home!
Only bad thing is I’m currently 150 miles from home!
2007 3.0si Coupe, LED interior lights, Stubby, ZHP, AC Schnitzers, 15mm spacers on the rear. 1993 Modified Pre-Cat TVR Griffith, Ducati Monster 821, MV Agusta F3 675
- Ducklakeview
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Engine fan on at startup?
Yup, common side effect of a failing water pump, BUT as said, I would have the codes read first rather than just shelling out for a replacement.
Not a difficult job to DIY, and parts aren't too bad. I did one recently and a genuine pierburg pump plus a branded thermostat, BOTH with lifetime unlimited mileage warranty came to £370 inc vat. There are pierburg pumps on eBay for I believe around £240-250 but I thought £370 all in for both was a better deal, especially as if they ever fail again they will be replaced FOC.
Refilling the cooling system can be tricky, bmw insist on using a vacuum filling unit, which does the job correctly in minutes. I have only done them using the correct tool and automatic pump bleeding sequence, which runs the water pump for 12 mins continuously with the engine off and cold. But in order to do that you need a constant voltage supply connected to the battery as the ign, interior fan and dipped headlights need to be on for the full 12 mins. This draws about 40 amps, so you must have a diagnostic support unit attached to the battery that is capable of supplying the required current while maintaining 13v+
I can imagine it being a nightmare to vent the air from the system without the above.
Mike
Not a difficult job to DIY, and parts aren't too bad. I did one recently and a genuine pierburg pump plus a branded thermostat, BOTH with lifetime unlimited mileage warranty came to £370 inc vat. There are pierburg pumps on eBay for I believe around £240-250 but I thought £370 all in for both was a better deal, especially as if they ever fail again they will be replaced FOC.
Refilling the cooling system can be tricky, bmw insist on using a vacuum filling unit, which does the job correctly in minutes. I have only done them using the correct tool and automatic pump bleeding sequence, which runs the water pump for 12 mins continuously with the engine off and cold. But in order to do that you need a constant voltage supply connected to the battery as the ign, interior fan and dipped headlights need to be on for the full 12 mins. This draws about 40 amps, so you must have a diagnostic support unit attached to the battery that is capable of supplying the required current while maintaining 13v+
I can imagine it being a nightmare to vent the air from the system without the above.
Mike
Last edited by Ducklakeview on Sun Dec 03, 2017 1:45 am, edited 1 time in total.
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Engine fan on at startup?
I'm pretty mechanically and have tools, just not too much time in the run up to work. I've found one for £310.
If only you were local Mike!
If only you were local Mike!
2007 3.0si Coupe, LED interior lights, Stubby, ZHP, AC Schnitzers, 15mm spacers on the rear. 1993 Modified Pre-Cat TVR Griffith, Ducati Monster 821, MV Agusta F3 675
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Engine fan on at startup?
Hmmmmm... really? ECP is £500 odd.
2007 3.0si Coupe, LED interior lights, Stubby, ZHP, AC Schnitzers, 15mm spacers on the rear. 1993 Modified Pre-Cat TVR Griffith, Ducati Monster 821, MV Agusta F3 675
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Engine fan on at startup?
Cheers Mike! I'll give you a bell soon.
2007 3.0si Coupe, LED interior lights, Stubby, ZHP, AC Schnitzers, 15mm spacers on the rear. 1993 Modified Pre-Cat TVR Griffith, Ducati Monster 821, MV Agusta F3 675
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Engine fan on at startup?
Ok, so I've made it home the 150 miles. The car only seems to do it when totally cold?
Still pointing towards the water pump?
Anyhow I've plugged the code reader in and there is nothing stored and all monitors etc. are ok. As I've just hit 73k I am thinking of having it replaced as a preventative measure as I need the car over Christmas.
Still pointing towards the water pump?
Anyhow I've plugged the code reader in and there is nothing stored and all monitors etc. are ok. As I've just hit 73k I am thinking of having it replaced as a preventative measure as I need the car over Christmas.
2007 3.0si Coupe, LED interior lights, Stubby, ZHP, AC Schnitzers, 15mm spacers on the rear. 1993 Modified Pre-Cat TVR Griffith, Ducati Monster 821, MV Agusta F3 675
- Smartbear
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Engine fan on at startup?
Hi, mine only did it from cold as well, what code reader did you use, cheap & cheerful or a professional type?Wildfire wrote: ↑Sun Dec 03, 2017 8:20 pm Ok, so I've made it home the 150 miles. The car only seems to do it when totally cold?
Still pointing towards the water pump?
Anyhow I've plugged the code reader in and there is nothing stored and all monitors etc. are ok. As I've just hit 73k I am thinking of having it replaced as a preventative measure as I need the car over Christmas.
A garage read the codes on mine with some serious kit
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
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Engine fan on at startup?
As Rob said earlier, code read is needed. A lot of the cheaper obd ones will either not talk to the modules needed, or read pending codes.
Mike
Mike
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Engine fan on at startup?
Ah right. Many thinks again Mike and Rob.
I reckon it's on it's way out. It wasd just a cheap and cheerful, not INPA. Ah well....
I reckon it's on it's way out. It wasd just a cheap and cheerful, not INPA. Ah well....
2007 3.0si Coupe, LED interior lights, Stubby, ZHP, AC Schnitzers, 15mm spacers on the rear. 1993 Modified Pre-Cat TVR Griffith, Ducati Monster 821, MV Agusta F3 675
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Engine fan on at startup?
You near me? I'm NW London
3.0si Sport: F10 Illuminated ZHP, Retrofit Cruise, OE Stubby, Gaptech RCH+, Kenwood BT73DAB + Handsfree, HIDs, LED Sidelights, OE LED Number Plate Lights, Custom LED strip bootlight.
- Ducklakeview
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Engine fan on at startup?
You are pretty much on the mileage for it being done tbh. I would change the stat whilst you are in there as well. They aren't known for failing, but they are an electrically controlled stat rather than a traditional wax capsule one so I would change it, although if the stat fails, it should fail safe, ie open rather than closed.
Mike