Enigine Fan turns on and Off

[M@rk]

Hello,

I have the folowing problem 135i N54 ,101 000km

Last night the fan came on for no reason what could it be ?

1) I start the car
2) Wait 1-2minutes
3) Outside temp 10 degrees
4) The Engine fan turns on for a couple of seconds/maybe a minute then off again and it would keep do that doenst matter if the car is cold or warm.
5)checked oil and water no issues
6)there is a loss of power but still boosting slightly
7)No Eninge light on the cluster
8)car is not overheating

Anyone had a similar problem or could point me inthe right direction, cause to me i thinks its the temp sensor but that doesn't explain the power los .

 

[Woodies]

Have you replaced your water pump yet?


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[Pho3niX90]

You would have to get it diagnosed. Usually a fan that comes on for no reason tends to be a busted thermostat, but assumptions will just make you endup spending a lot of money without sorting the issue out.

A lot of users on the forum would help with diagnostics, or better yet check on gumtree and get yourself the cable to diagnose yourself, it will make life easier going forward. They typically rangr between 400 and 900 for the cable and software

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[M@rk]

Have you replaced your water pump yet?


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I recently bought the vehicle like a two months now since I have owned it i would need t pull the history and check.

---

You would have to get it diagnosed. Usually a fan that comes on for no reason tends to be a busted thermostat, but assumptions will just make you endup spending a lot of money without sorting the issue out.

A lot of users on the forum would help with diagnostics, or better yet check on gumtree and get yourself the cable to diagnose yourself, it will make life easier going forward. They typically rangr between 400 and 900 for the cable and software

Sent from my MHA-L29 using Tapatalk

I have a Dcan /Inpa cable what software do i need , Also what should i look for since there is no engine light/fault code?

Would a faulty thermostat not make the cat overheat or take ages to warm up?

 

[NAS325ci]

Download mhd n54 and get an otg cable to your phone mhd can read codes

 

[Ratslaaf]

Like others have said, get diagnostics done. I'm also leaning towards a possible water pump issue; probably there's a communications failure with the pump thus the fan kicking in. This will not throw up an engine light.

 

[Silverbird_96kw]

I know some F30 335i has a similar prob where the fan also kicks in but then doesnt shut off, but fan kicks in on stage 2 being full full blast and very loud.
When driving normally it will just begin.
While the fan is on and you try to give it beans full power is not there. Protecting itself...
But the fix was the sensor on the fan itself.

But here is some more reading - http://f30.bimmerpost.com/forums/showthread.php?t=786475

Not sayinf the E82 has the same prob - but can be something as small as that...

 

[M@rk]

Thank you all for the advise I had the car scanned via MHD .

The following faults were found.

2A99-DME: Crankshaft-Exhaust camshaft,Reference.
2E81-DME: Electrical coolant pump,speed deviation.
2E82-DME: Electric coolant pump,cutoff.
2F8F-DME: Accelerator pedal module and brake pedal,plausibility.
2F9E-DME: Oil Level.
3100-DME: Boost-Pressure control ,Deactivation.

 

[Ratslaaf]

Well there you go, coolant pump seems an issue. There would appear to be a duff solenoid valve, or sludge in vanos for the exhaust cam. This may be caused by the low oil level error as well.

That being said, it's impossible to say how long these errors have been there or if they're relevant still. Dealer level diagnostics will actually show the mileage when these errors occurred so would help in validating what's currently an issue on the car.

 

[Kish2604]

Thank you all for the advise I had the car scanned via MHD .

The following faults were found.

2F8F-DME: Accelerator pedal module and brake pedal,plausibility.

Not related but take it easy on the brake boosting the car of the line...

 

[Iceman12596]

Thank you all for the advise I had the car scanned via MHD .

The following faults were found.

2A99-DME: Crankshaft-Exhaust camshaft,Reference.
2E81-DME: Electrical coolant pump,speed deviation.
2E82-DME: Electric coolant pump,cutoff.
2F8F-DME: Accelerator pedal module and brake pedal,plausibility.
2F9E-DME: Oil Level.
3100-DME: Boost-Pressure control ,Deactivation.

Had the exact same codes 2E81 and 2E82 when my waterpump failed

 

[M@rk]

Ok so I Bought a New Water pump with metal impeller and Thermostat.

Going to fit it myself and a mate tonight,i hope that it fix the issue and its not something else.

I will revert back once its fitted ,Thanks for the help gents.

 

[M@rk]

Problem Solved so it turned out to be the Water pump , I am so glad its sorted now it should be good for the next 40k km

:ty:

 

[husaindindar]

Glad you sorted.

Could you share with us how much did it cost for the pump and thermo?
Did you DIY it?

 

[M@rk]

Glad you sorted.

Could you share with us how much did it cost for the pump and thermo?
Did you DIY it?

I Bought them at Imcomex Centurion since Goldwagen didn't have stock .

I paid R6,500 for the combo , received dealer discount normal price is +-R7,200.

 

[husaindindar]

Glad you sorted.

Could you share with us how much did it cost for the pump and thermo?
Did you DIY it?

I Bought them at Imcomex Centurion since Goldwagen didn't have stock .

I paid R6,500 for the combo , received dealer discount normal price is +-R7,200.

Thanks!

 

[M@rk]

Glad you sorted.

Could you share with us how much did it cost for the pump and thermo?
Did you DIY it?

I Bought them at Imcomex Centurion since Goldwagen didn't have stock .

I paid R6,500 for the combo , received dealer discount normal price is +-R7,200.

Thanks!

Oh and yes We did it our self a mate and I . He is a workshop manager so we had access to a lift.

 

[Silverbird_96kw]

Really glad the car is sorted out.
Now to enjoy it again raise:

 

[Fordkoppie]

This might be a silly question, but are you sure its doing that while the AC is off?

 

[Spoed]

hey sun shine

i think your water pump left the earth looking for better driving conditions :roflol: