E87 not getting up to temperature.

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Manufactured from 2004 to 2013

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Ally
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E87 not getting up to temperature.

Post by Ally » Sun Jan 21, 2018 4:48 pm

Hi I have a problem with my e87 2009. The problem is I'm getting very poor mph. 32 mpg and 34 mpg if I drive like a granny. I have watched my temperatures and it sits around 80c to 84c when driving , when I'm at a stop normally sits at 86c. So my car isn't getting up to temperature. I have changed the main thermostat ( n47 ) engine so don't have the egr stat. But it's no made any differance. I'm lost now on what else could be the cause of it not heating up enough , does anyone else know what else could be causing it not to heat up. Took car on about 40 mile run yesterday and it still was no more than 86c. I have tested old stat. And it seems to be opening up ok. Any ideas anyone ?

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Re: E87 not getting up to temperature.

Post by Ally » Mon Jan 22, 2018 5:13 pm

Does No one have any ideas ?

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Re: E87 not getting up to temperature.

Post by jason@bwchiptune » Mon Jan 22, 2018 9:08 pm

Was it and original main thermostat from the main dealers???

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Re: E87 not getting up to temperature.

Post by Ally » Mon Jan 22, 2018 9:20 pm

Hi no it was one from euro car parts I had no chose there was only one make to chose from.

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Re: E87 not getting up to temperature.

Post by marco_polo » Mon Jan 22, 2018 9:27 pm

Is the coolant temp sensor 100% healthy?

Does it read correctly when stone cold, it should (basically) read ambient air temp if left for a few days?
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Re: E87 not getting up to temperature.

Post by Ally » Tue Jan 23, 2018 9:33 pm

I will try to check it out to make sure. So if I'm correct your saying it should say about same temperature when cold as the outside temperature, is this right

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Re: E87 not getting up to temperature.

Post by marco_polo » Tue Jan 23, 2018 9:36 pm

Yup. If it's been 5C all night, it should read roughly 5C.

If it reads -2C or whatever, it's probably knackered (or it's cabling/connector).
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Re: E87 not getting up to temperature.

Post by Ally » Wed Jan 24, 2018 9:28 pm

Ok I'll post back at weekend when I can test this and other things out

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Re: E87 not getting up to temperature.

Post by David 8 » Thu Jan 25, 2018 12:47 pm

I thought 82-87c was about right on the N47. I changed my stat years ago when it was running low at around 70c constant. The stat was genuine and currently runs at about 83c constant only going up on hot days, or when the DPF is regenerating.
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Re: E87 not getting up to temperature.

Post by marco_polo » Thu Jan 25, 2018 4:46 pm

David 8 wrote:
Thu Jan 25, 2018 12:47 pm
I thought 82-87c was about right on the N47. I changed my stat years ago when it was running low at around 70c constant. The stat was genuine and currently runs at about 83c constant only going up on hot days, or when the DPF is regenerating.
The Thermostat should open at 88°C : http://www.realoem.com/bmw/enUS/part?id ... 1517805192
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Re: E87 not getting up to temperature.

Post by David 8 » Thu Jan 25, 2018 4:52 pm

So does that mean the engine should run at that temperature?

As you can probably tell I'm not the best with these things :oops:
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Re: E87 not getting up to temperature.

Post by marco_polo » Thu Jan 25, 2018 7:25 pm

That's the temperature the engine should start to cool itself down again, basically.

It's possible the engine won't get there if the engine block / cylinder head is naturally loosing loads of heat to a really cold ambient climate, but it's above freezing in most of the UK currently.
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Re: E87 not getting up to temperature.

Post by David 8 » Thu Jan 25, 2018 7:52 pm

Yeah thats how I understood it, just about understood it anyway.

Mine has always been around 82-84 until the stat went, as said it will rise as the outside temp raises or it's under load. I noticed earlier that it was at 84 in traffic then I hit the throttle on a bypass and it dropped to 70 then straight back as it went up the rev range, it's always done that too. Is it possible my engine is just naturally chilled out? :lol: :lol:
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Re: E87 not getting up to temperature.

Post by jason@bwchiptune » Thu Jan 25, 2018 9:39 pm

Did it have a round rubber seal on the part of valve plate as this always drops off when it 1st opens allowing water to flow

Take it off and look at it

Buy one from bmw as I've seen this with copy thermostats all the time on this model

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Digital Service Records rest and corrections in idrive screen on 2013 onwards cars
DPF repairs fixed without the need of removal of its guts or replacement
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Re: E87 not getting up to temperature.

Post by 0l0dom0l0 » Fri Jan 26, 2018 2:29 pm

Ally wrote:
Sun Jan 21, 2018 4:48 pm
Hi I have a problem with my e87 2009. The problem is I'm getting very poor mph. 32 mpg and 34 mpg if I drive like a granny. I have watched my temperatures and it sits around 80c to 84c when driving , when I'm at a stop normally sits at 86c. So my car isn't getting up to temperature. I have changed the main thermostat ( n47 ) engine so don't have the egr stat. But it's no made any differance. I'm lost now on what else could be the cause of it not heating up enough , does anyone else know what else could be causing it not to heat up. Took car on about 40 mile run yesterday and it still was no more than 86c. I have tested old stat. And it seems to be opening up ok. Any ideas anyone ?
Not sure I agrree with the bit in bold.

You have an EGR stat. Change that, it will fix your problem.
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