[holmefield]

Yer I'm going to take the Egr stat off thopefully this weekend blow through it and if its knackered I'll order a new one, for the time it takes to change its worth doing..I'm going to check my temps again over the weekend if I go on a drive&again monday morning Am on the way to work...

I have a feeling im going to have to do the main stat to....bugger!!!

Its just weird how the mpg is still ok..

[makkan00]

Originally Posted by holmefield

Yer I'm going to take the Egr stat off thopefully this weekend blow through it and if its knackered I'll order a new one, for the time it takes to change its worth doing..I'm going to check my temps again over the weekend if I go on a drive&again monday morning Am on the way to work...

I have a feeling im going to have to do the main stat to....bugger!!!

Its just weird how the mpg is still ok..

Its both thermos. If somebody says to you change one....
other will go soon.

So if you change, change in pair. Give it 2-3 years and they will go faulty again.
If you buy ECP ones, they go faulty in two weeks.

[holmefield]

Right took my EGR stat off, the two screws @ the back that keep the engine cover on are a right bugger to get @!!

Managed to get that stupid little pipe out of the way of the way that covers the inner hex bolt and removed the stat, i blew through it and yes it was quite like blowing through a straw, there was a little resistance but not very much.

So i put it all back together

[holmefield]

I'm going to keep an eye on the temps over the next couple of days but im going to order a new EGR stat on Monday fit it keep an eye on the temp again then probably order the main stat in a week or two...

[holmefield]

Well I fitted a spare used Egr stat last week that I'd changed from a previous car ( thinking it was knackered ) blew through the spare and it was soot in usable..my temps went up about 5c...bugger..

So I ordered a main stat from allgermanparts 24hrs from order to delivery ( and its OEM spec + far better price than the main stealers )

So yesterday moring took the plunge, I used a Pdf download load off here with a 6 page guide started @ 10am and was finished by 1pm, there where loads of hidden screws but after fitting it and driving for awhile + checking again today the temps are now around 88/91c after around 9miles...

[makkan00]

I would not trust any other thermo as they all go faulty within few months.
All that hardwork....somebody will have to do it again if thermo go faulty.

[Jase 320d]

To comfirm i fitted an ECP circoli main stat!

Utter garbage!

Lasted a month! Buy shite buy twice! Genuine everytime

[Dan-]

Originally Posted by Jase 320d

To comfirm i fitted an ECP circoli main stat!

Utter garbage!

Lasted a month! Buy shite buy twice! Genuine everytime

Glad i waited an extra day and waited for a genuine pair of stats to be in my local BMW after reading this!

[makkan00]

Originally Posted by Dan-

Glad i waited an extra day and waited for a genuine pair of stats to be in my local BMW after reading this!

[marklemac]

Originally Posted by mistryn

Its worrying that BMW thought not to put a temperature gauge, especially when a dpf regen needs 88+ degree to start and if it never gets to temp then how does it regen?

I get regular regens when the temps are around 75.......

Had one today at 77 degrees.

[marklemac]

Can anyone tell me the part number for the main thermostat for my 2009 335d please

[kiel_dafo_kenyg_as]

Originally Posted by marklemac

Can anyone tell me the part number for the main thermostat for my 2009 335d please

11517805811

http://de.bmwfans.info/parts-catalog...rmostat/#pos_4


Can anyone explain how changing the EGR stat has influence on the coolant temperature?

To my understanding a defective EGR stat supplies MORE heat to the coolant cause the water takes more heat out of the exhaust gasses. From what I read the stat remains in the open position when defective. Wouldn't a new stat lower the water flow and keep it cooler?

[superflyguy9]

Originally Posted by whiteblue

11517805811

http://de.bmwfans.info/parts-catalog...rmostat/#pos_4


Can anyone explain how changing the EGR stat has influence on the coolant temperature?

To my understanding a defective EGR stat supplies MORE heat to the coolant cause the water takes more heat out of the exhaust gasses. From what I read the stat remains in the open position when defective. Wouldn't a new stat lower the water flow and keep it cooler?

see post 15 on here..... http://www.e90post.com/forums/showth...t=superflyguy9

[marklemac]

Just got the price from Cotswold BMW (I'm still a member of the 1 series forum, they offer discounts to members)

"The main stat will cost £54.41 inc VAT and the EGR stat £43.12 inc VAT.

So a grand total of £97.52 inc VAT and P&P."

Pretty reasonable price me finks, will be ordering that after Xmas

[Jase 320d]

Egr stat from ECP is genuine that they sell! Think its just over £20

Its a beru one (oem) with the beru and bmw stamps ground off.

Get genuine main one from bmw as ECP dont do them

[marklemac]

Cheers Jase, do you have a link for one of them ?

[Ess]

Originally Posted by marklemac

I get regular regens when the temps are around 75.......

Had one today at 77 degrees.

My stats were faulty for several months until I fixed them, seemed to stay around 70 to 75 degrees. According to BMWhat, regens continued happening normally. Stats are now fixed and car still seems fine.

[holmefield]

Try allgermancarparts

type that all as one word into google, really top bloke + he supplys OEM quality parts i got my main stat for my 330 D delivered in 24hrs for £43.00 ..

[HighlandPete]

Originally Posted by whiteblue

Can anyone explain how changing the EGR stat has influence on the coolant temperature?

To my understanding a defective EGR stat supplies MORE heat to the coolant cause the water takes more heat out of the exhaust gasses. From what I read the stat remains in the open position when defective. Wouldn't a new stat lower the water flow and keep it cooler?

Yes the EGR exchanger does supply heat IF the thermostat is functioning correctly, coolant flow will be prevented (except for a slow coolant bleed to heat the thermostat) until >70C, then only a small flow until EGR cooler is >90C.

Superflyguy9 has posted a link to one of my earlier posts, where the EGR thermostat function and typical failure mode are described.

What we need to remember, once the EGR thermostat stays open (even if only partially), coolant is drawn into the system from the cold side of the radiator. It is in effect "short circuiting", by-passing any heat control, (the main thermostat). As this is a continuous flow when the engine is running, it simply chills any warm/hot coolant. The flow is quite significant when we see it as litres per minute. No chance of allowing an engine to reach normal ECT, as it is unregulated coolant flow.

The same can happen in auto models when the transmission oil cooler thermostat fails, that also can by-pass the main thermostat.

Another issue... EGR cooling is uncontrolled with a failed EGR thermostat, we can have over cooled EGR, not what we want for best combustion. Failed thermostats are all against us, prevent the fastest engine heat up, dulls engine efficiency, can knock our mpg.

HighlandPete

[kiel_dafo_kenyg_as]

once the EGR thermostat stays open (even if only partially), coolant is drawn into the system from the cold side of the radiator. It is in effect "short circuiting", by-passing any heat control

Ahhh, that makes it all clear. The EGR stat is an easy and cheap swap. I'll do it soon (car is in hibernation)

BTW for some reason the forum answering/quoting function stopped working properly. One has to self-html it

[j33ven]

Has anyone solved there temperature issue by changing the EGR stat alone?

I am contemplating doing the DIY but I'm a novice when it comes to mechanics. Do I still need to siphon the coolant and bleed after for just the EGR stat change?

Do E92's have the electronic pump to automatically bleed the system?

Any help would be great thanks.

[HighlandPete]

Originally Posted by j33ven

Has anyone solved there temperature issue by changing the EGR stat alone?

I am contemplating doing the DIY but I'm a novice when it comes to mechanics. Do I still need to siphon the coolant and bleed after for just the EGR stat change?

Do E92's have the electronic pump to automatically bleed the system?

Any help would be great thanks.

Yes a failed EGR thermostat can, in some engines, be the only issue. Often when changed, we may find the ECT is still a few degrees down on the design intent, but stable. (Say ~85c instead of 88 - 92C). This shows the main thermostat is slowly losing the optimum opening temperature.

BTW, replied to your PM.

HighlandPete