[mob17]

Mine takes a good 20 mins to reach 86c, sometimes longer, and stays there. Should i change my egr stat or forget about it?

[philmots]

Mine hits 90 degrees in well under 10 minutes.

That's flowing roads too getting plenty of air.

I'd say that is normal..

[mob17]

Originally Posted by PhilM

Mine hits 90 degrees in well under 10 minutes.

That's flowing roads too getting plenty of air.

I'd say that is normal..

So can i check my EGR stat if it needs replacing? Like taking it out and having a look?

[philmots]

Mine was stuck open.. You could blow through it.

A lot of people change this and notice an improvement - but not fully fixed.

I just bit the bullet and did them both in one go. I've no idea if my main stat was working correctly or not, there's no way to see if it's opening too soon or not.

I'd probably be tempted to do the EGR as it's a lot more DIY and see how it is.

[mob17]

Originally Posted by PhilM

Mine was stuck open.. You could blow through it.

A lot of people change this and notice an improvement - but not fully fixed.

I just bit the bullet and did them both in one go. I've no idea if my main stat was working correctly or not, there's no way to see if it's opening too soon or not.

I'd probably be tempted to do the EGR as it's a lot more DIY and see how it is.

Cheers, just on my way to my indy for an oil and fuel filter change. Will get him to check it.

[badgerbrock72]

good luck mate let us know how it goes

[mistryn]

I would say if your egr stat has failed/starting to fail the main stat wont be too far behind from failing. Just get both done at the same time as you have to take egr stat off to get to the main stat

[philmots]

Originally Posted by mistryn

I would say if your egr stat has failed/starting to fail the main stat wont be too far behind from failing. Just get both done at the same time as you have to take egr stat off to get to the main stat

+1

That's why I just had them both done.

I'm just hoping I've saved my DPF..! Had no issues since I've bought it (3/4 months) but since having the stats done it's the first time i've ever noticed it regenerating..

I bet they just never regenerate and ultimately get blocked and die all because of 2 pissy thermostats.

Not changing them IMO is false-economy.

[mob17]

Hmmm thats given me food for thought. Luckily we didn't have time today as i'm now picking up my M3 wheel nearby. Have rescheduled for Friday.

I have had regens before i think. Temp went up to 97-98. But normally its always on 86 and it takes a while especially when its cold. So you guys still think i should replace both anyway? Car is 2008 and has around 39k miles.

[philmots]

If your car is reaching those temperatures then it will complete regerations. IIRC it needs to be over 75 degrees to regen. Mine didn't ever reach that before, hence no regens.

If I had yours I'd probably leave it for the moment - but it depends how much you want your car to be 'right' and how long you're planning on keeping it? If you're wanting to keep it for 3 years I'd probably have them done now and benefit straight away as chances are they won't need doing again before you get rid.

Although, didn't you say before that it takes 20 minutes or so to get there?? If so I'd be getting them done now as that's not right, you should notice an improvement in MPG as it's stopping on the cold cycle for too long.

[mob17]

Originally Posted by PhilM

If your car is reaching those temperatures then it will complete regerations. IIRC it needs to be over 75 degrees to regen. Mine didn't ever reach that before, hence no regens.

If I had yours I'd probably leave it for the moment - but it depends how much you want your car to be 'right' and how long you're planning on keeping it? If you're wanting to keep it for 3 years I'd probably have them done now and benefit straight away as chances are they won't need doing again before you get rid.

Although, didn't you say before that it takes 20 minutes or so to get there?? If so I'd be getting them done now as that's not right, you should notice an improvement in MPG as it's stopping on the cold cycle for too long.

Not really sure how long i'm going to keep it but i do want the coolant to be running at 90+. Not sure why but would make me feel better!

Yeah from a very cold start and driving at 20-30mph it takes roughly 20 mins. I'll monitor it tomorrow morning from a cold start @ 20-30mph and will double check the time it takes.

[335DEE]

Just to throw some shizzle into the mix , mine takes 20 mins to get to temp and i've had both stats changed.
Bear in mind that it does have a lot to do with how hot you have your interior heating set too, because your interior comfort takes priority ( basically as soon as it can supply the required temperature it does) and this takes a big thermal load off the cooling system as it is directed elsewhere through the heater matrix( aka another radiator).

The long and short of it .. As long as it regens , I'm happy

[mob17]

Hmmm timbo has given me food for thought.

This morning the temp started at 16c and went up to 75c after 10 mins with heating and seat heating on @ 30-40mph, then after the next 10 mins it went to 80c. 5 mins later it settled at 84/85. So 25 mins.

So if i change both stats, will it get to 90c+ within 10 mins?

[HighlandPete]

Originally Posted by mob17

Hmmm timbo has given me food for thought.

This morning the temp started at 16c and went up to 75c after 10 mins with heating and seat heating on @ 30-40mph, then after the next 10 mins it went to 80c. 5 mins later it settled at 84/85. So 25 mins.

So if i change both stats, will it get to 90c+ within 10 mins?

Some of the warm up time variation is due to engine load, so depends on what sort of trip you are on. Mine would take about 12 miles as an average, as it was an easy light load trip. But near feezing days I'd not get to 85-86C after 12 miles.

The other factor is electrical load, if high or battery charge is a bit low, the PTC electric heater in the HVAC system won't necessarily be working at full wack. So that will affect warm up time/mileage, if the coolant has to do more to heat the cabin.

BTW, that second 'ten minutes' to get another 5C, is a good clue of an early opening thermostat.


HighlandPete

[mob17]

Originally Posted by HighlandPete

Some of the warm up time variation is due to engine load, so depends on what sort of trip you are on. Mine would take about 12 miles as an average, as it was an easy light load trip. But near feezing days I'd not get to 85-86C after 12 miles.

The other factor is electrical load, if high or battery charge is a bit low, the PTC electric heater in the HVAC system won't necessarily be working at full wack. So that will affect warm up time/mileage, if the coolant has to do more to heat the cabin.

BTW, that second 'ten minutes' to get another 5C, is a good clue of an early opening thermostat.


HighlandPete

Thanks.

So would you advise replacing both stats or just leave it? The temp is always at 85-86c. Would this definitely improve or is it hard to say?

[mob17]

Originally Posted by o0timbo0o

Just to throw some shizzle into the mix , mine takes 20 mins to get to temp and i've had both stats changed.
Bear in mind that it does have a lot to do with how hot you have your interior heating set too, because your interior comfort takes priority ( basically as soon as it can supply the required temperature it does) and this takes a big thermal load off the cooling system as it is directed elsewhere through the heater matrix( aka another radiator).

The long and short of it .. As long as it regens , I'm happy

Just come back from a drive.

Temp started at 36c. After 6 mins of driving at 40-70mph, and with all heating/seat heating off, the temp reached 84c and stayed there.

So was it the heating off or the speed that improved things? I still don't understand if i should replace either of the stats

[Dr Dave]

Mob - I don't think you have anything to worry about there, I'd say everything was working well.

[utkunoa]

Hello friends I am new in here from turkey !

I think I have a problem with my cooling system. I open the coolant temp from hidden menu. It show 92-94 centigrat in normal use, when I use with high boost its increase to 115 !. I change the EGR termostat. Main termostat. and water pump. But problem is still continue. Is my DPF is full ? car do regen everytime to clean the DPF ? Please help me

Thanks
Utku