problem solved; engine 525D not reaching operating temperature.
#71
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Originally Posted by E61530DAT' post='800999' date='Feb 25 2009, 08:39 AM
I`m finally reaching normal operating tempereature 90 - 93 C ! After first replacing the EGR thermostat temperature improved from 62 to 78 C. Now I have replaced the main thermostat (not as easy as EGR!) and temperature are stable at 91 C !!!
Replacing the main thermostat took me 4 hours and I had to remove two airducts and the exhaust cooler to get to it. ...
I drove to work today 100 km with both higway and rush traffic - now using average 7.1 liters /100km - before 8.3 liters /100km
Replacing the main thermostat took me 4 hours and I had to remove two airducts and the exhaust cooler to get to it. ...
I drove to work today 100 km with both higway and rush traffic - now using average 7.1 liters /100km - before 8.3 liters /100km
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Originally Posted by parmblagan' post='799296' date='Feb 23 2009, 01:57 PM
hi guys
i have this problem with low MPG with my car (average through town is 20 MPG from auto 525D 2005) want to get it solved as its costing me a packet. i have had a new air mass sensor put in and the MPG remains the same. had it remapped but the mpg remains the same. so after reading this topic i checked the temp. of my car and it gets to max of 84-86 depending on my speed, but usually takes about a 6 mile journey to acheive these temperatures.
this week end i removed the egr thermo, and exaimed it. i too can blow air through it.
so my question is my car is getting up to 84-86 but i can blow through the EGR thermo, do i need to replace it?
i have this problem with low MPG with my car (average through town is 20 MPG from auto 525D 2005) want to get it solved as its costing me a packet. i have had a new air mass sensor put in and the MPG remains the same. had it remapped but the mpg remains the same. so after reading this topic i checked the temp. of my car and it gets to max of 84-86 depending on my speed, but usually takes about a 6 mile journey to acheive these temperatures.
this week end i removed the egr thermo, and exaimed it. i too can blow air through it.
so my question is my car is getting up to 84-86 but i can blow through the EGR thermo, do i need to replace it?
I could blow through my old one and not through the new one.
Though your temps dont sound so bad i think.
Did you check egr valve? Are all wheels turning without to much resistance?
#73
Originally Posted by mini_me' post='801008' date='Feb 25 2009, 03:01 AM
I am by no means an expert but in my book a thermostat should be closed at amb. Temps.
I could blow through my old one and not through the new one.
Though your temps dont sound so bad i think.
Did you check egr valve? Are all wheels turning without to much resistance?
I could blow through my old one and not through the new one.
Though your temps dont sound so bad i think.
Did you check egr valve? Are all wheels turning without to much resistance?
#74
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My Ride: 2004 E61 530D SE Auto, Silver Grey, Media pack, Visibilty pack, Panaoramic roof, Active Steering, Black leather, Memory seats, folding mirrors, extended lighting etc etc
Re Engine temp and poor MPG
I am having a similar probelm with MPG (2004 E61 530D se)
We bought it June last year after 4 years with an E39 530D auto that averaged 35mpg over 60K.
The E61 was great at first getting around 35-36 mpg, it gradually started to drop and is now averaging 27-28 mpg, it is mainly used for journeys of 40+ miles and on a long motorway run will only do 30mpg (230 miles non stop at around 80mph with trip computer reset at start of journey)
I took it to the dealers when the consumption first dropped and they replaced some parts related to the EGR - it also had a major service
For a short while it was back to normal then began to decline again
It is only getting around 420 miles a tank so the computer is not lying to me.
After reading this post I brought up the engine temp on the dash to check it
On a cold day it took around 40 miles to hit 80c and when stood idling, after about 30 mins it eventually reached 88-89c
Normal running when the engine is warm seems to be around 78-80c so not sure if thermostats are ok - the car has the flaps on the front grill.
In relation the to MPG I have several other ideas
Particle filter problem?
EGR problem?
Altenator problem?
If anybody has any info on the what I have written below please reply
As the MPG has declined the car has been going into particle filter regeneration mode more often (booming and very hot exhaust)
I have been making a note of when it does this, it used to be every 1000 miles and has now gradually decreased to 450 miles?
I have also had a strange intermittent electrical fault , when staring from cold the I drive screen is often very dim for about 15 mins and the dials do not come on sometimes for a few second somertimes a few minutes (no speedo or rev counter) - Been into dealer and no faults apparent
Last sunday when driving along the I drive screen started to flash on and off, I got my wife to video this on her phone in order to show the dealer.
A few moments later I felt a thud from the transmission and the car locked into a high gear with little power and the same time transmission failure came up on the dash.
I could not select any manual gears or sport mode
The I drive screen then went blank and the following warnings appeared randomly
ABS failure
DSC failure
Active steering failure - power steering went off completely!
Battery failure
Service
Suspension failure
Oil light
All electrics then gradually shut down including the entire dash
At this point I was nearly home so kept going while my wife was on the phone to BMW emergency service.
The car would now only do a walking pace with the engine racing and crept onto the drive.
Once switched off it would not restart, the boot would not even unlock but the headlamps came on on full beam when the ignition key was turned to position 1?
The breakdown guy arrived within an hour and took it away on a flat bed.
The dealer said the car car started fine the next day at the workshop!
I had been researching on the forums and found several instances of altenator failure and mentioned this to them
The said it was not showing a fault but took it off anyway - apparently it looks burnt out!
Could the altenator be a cause of poor MPG, it has obvioulsy been going for some time?
Anyway i'm due to pick the car up today with a new altenator and the latest software installed and will update on the MPG saga
One more thing, I am running the car on 18" wheels without run flats
The tyres are Goodyear Eagle F1's - they are not wearing normally and will need replacing soon.
The rears are wearing in the centres and the front offside is wearing into a 50p shape on the outer edge of tread giving a dronning noise ( common fault on other forums with this tyre)
All ran at BMW pressures as shown inside the drivres door
What non runflats are you running and at what pressures?
Sorry for the long post but I know there is a lot of good advice and experience out there
Cheers
Stephen
I am having a similar probelm with MPG (2004 E61 530D se)
We bought it June last year after 4 years with an E39 530D auto that averaged 35mpg over 60K.
The E61 was great at first getting around 35-36 mpg, it gradually started to drop and is now averaging 27-28 mpg, it is mainly used for journeys of 40+ miles and on a long motorway run will only do 30mpg (230 miles non stop at around 80mph with trip computer reset at start of journey)
I took it to the dealers when the consumption first dropped and they replaced some parts related to the EGR - it also had a major service
For a short while it was back to normal then began to decline again
It is only getting around 420 miles a tank so the computer is not lying to me.
After reading this post I brought up the engine temp on the dash to check it
On a cold day it took around 40 miles to hit 80c and when stood idling, after about 30 mins it eventually reached 88-89c
Normal running when the engine is warm seems to be around 78-80c so not sure if thermostats are ok - the car has the flaps on the front grill.
In relation the to MPG I have several other ideas
Particle filter problem?
EGR problem?
Altenator problem?
If anybody has any info on the what I have written below please reply
As the MPG has declined the car has been going into particle filter regeneration mode more often (booming and very hot exhaust)
I have been making a note of when it does this, it used to be every 1000 miles and has now gradually decreased to 450 miles?
I have also had a strange intermittent electrical fault , when staring from cold the I drive screen is often very dim for about 15 mins and the dials do not come on sometimes for a few second somertimes a few minutes (no speedo or rev counter) - Been into dealer and no faults apparent
Last sunday when driving along the I drive screen started to flash on and off, I got my wife to video this on her phone in order to show the dealer.
A few moments later I felt a thud from the transmission and the car locked into a high gear with little power and the same time transmission failure came up on the dash.
I could not select any manual gears or sport mode
The I drive screen then went blank and the following warnings appeared randomly
ABS failure
DSC failure
Active steering failure - power steering went off completely!
Battery failure
Service
Suspension failure
Oil light
All electrics then gradually shut down including the entire dash
At this point I was nearly home so kept going while my wife was on the phone to BMW emergency service.
The car would now only do a walking pace with the engine racing and crept onto the drive.
Once switched off it would not restart, the boot would not even unlock but the headlamps came on on full beam when the ignition key was turned to position 1?
The breakdown guy arrived within an hour and took it away on a flat bed.
The dealer said the car car started fine the next day at the workshop!
I had been researching on the forums and found several instances of altenator failure and mentioned this to them
The said it was not showing a fault but took it off anyway - apparently it looks burnt out!
Could the altenator be a cause of poor MPG, it has obvioulsy been going for some time?
Anyway i'm due to pick the car up today with a new altenator and the latest software installed and will update on the MPG saga
One more thing, I am running the car on 18" wheels without run flats
The tyres are Goodyear Eagle F1's - they are not wearing normally and will need replacing soon.
The rears are wearing in the centres and the front offside is wearing into a 50p shape on the outer edge of tread giving a dronning noise ( common fault on other forums with this tyre)
All ran at BMW pressures as shown inside the drivres door
What non runflats are you running and at what pressures?
Sorry for the long post but I know there is a lot of good advice and experience out there
Cheers
Stephen
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I wonder if those electrical problems are the signs of the common battery problems people seem to mention in these forums all the time ?, which of course could have been started by having a dodgy alternator ?
#76
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Hi Stephen
It looks like you are having a lot of problems!!
I run Verdestein Ultrac Sessanta non runflats 37.5 psi rear 36.5 psi front and they are wearing very evenly, if you are wearing the centre of the rears out then the pressure is to high.
It is usual to wear the outer edge of the nearside front (passenger side) due to camber of our roads and roundabouts etc but wear on the outer edge of the offside is not normal, maybe the tracking is out.
I have not heard of an alternator causing an increase in fuel consumption but it is more than likely the cause of your electrical problems if it's failed.
My fuel consumption dropped as the weather turned colder, I thought this was normal but after hearing of failed EGR and main thermostats with incorrect engines temps then this may be a contributing factor, my engine temps are 80C - 83C after changing the EGR stat and I have already noticed that my idle seems to be smoother than before but not had chance to check fuel consumption.
I hope you get things sorted out soon.
It looks like you are having a lot of problems!!
I run Verdestein Ultrac Sessanta non runflats 37.5 psi rear 36.5 psi front and they are wearing very evenly, if you are wearing the centre of the rears out then the pressure is to high.
It is usual to wear the outer edge of the nearside front (passenger side) due to camber of our roads and roundabouts etc but wear on the outer edge of the offside is not normal, maybe the tracking is out.
I have not heard of an alternator causing an increase in fuel consumption but it is more than likely the cause of your electrical problems if it's failed.
My fuel consumption dropped as the weather turned colder, I thought this was normal but after hearing of failed EGR and main thermostats with incorrect engines temps then this may be a contributing factor, my engine temps are 80C - 83C after changing the EGR stat and I have already noticed that my idle seems to be smoother than before but not had chance to check fuel consumption.
I hope you get things sorted out soon.
#77
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Your gonna have to pop round and show me how to see whats going on with mine as well Russ, I have seen the instructions for various sub menus but seem to get lost in the middle.
Coffee sometime ?? lol ?
Coffee sometime ?? lol ?
#78
Originally Posted by mini_me' post='801008' date='Feb 25 2009, 08:01 AM
I am by no means an expert but in my book a thermostat should be closed at amb. Temps.
I could blow through my old one and not through the new one.
Though your temps dont sound so bad i think.
Did you check egr valve? Are all wheels turning without to much resistance?
I could blow through my old one and not through the new one.
Though your temps dont sound so bad i think.
Did you check egr valve? Are all wheels turning without to much resistance?
thanks for your advice do you know where i can find the egr valve, how can i check to see if it is faulty?
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Originally Posted by E61530DAT' post='800999' date='Feb 25 2009, 02:39 AM
I`m finally reaching normal operating tempereature 90 - 93 C ! After first replacing the EGR thermostat temperature improved from 62 to 78 C. Now I have replaced the main thermostat (not as easy as EGR!) and temperature are stable at 91 C !!!
Replacing the main thermostat took me 4 hours and I had to remove two airducts and the exhaust cooler to get to it. ...
I drove to work today 100 km with both higway and rush traffic - now using average 7.1 liters /100km - before 8.3 liters /100km
Replacing the main thermostat took me 4 hours and I had to remove two airducts and the exhaust cooler to get to it. ...
I drove to work today 100 km with both higway and rush traffic - now using average 7.1 liters /100km - before 8.3 liters /100km
Any chance you could produce a short write up on how to replace the main tstat? i replaced the tstat on my old 325i and it was a doddle, I was hoping this would be the same but i guess not. it would be useful to know, my car is running at 80c tops. i have already got the EGR tstat to replace, so if the temp doesnt improve i guess it'll be the main stat next.
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Originally Posted by parmblagan' post='801166' date='Feb 25 2009, 04:16 PM
thanks for your advice do you know where i can find the egr valve, how can i check to see if it is faulty?
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