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ERG thermostat

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Old 11-27-2011, 12:35 PM
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Hi new to the site looks pretty good hopefully I can get the experts to throw some light on a few issues I am hanving with my 2004 e60 530d.

The fuel consumption is extremmly low I anm getting less thtan 400 miles to a full tank.Mixed driving

Things I have done so far

New breather valve(plastic type)
Full service
New air,diesel filters

No difference in consumption.

Checked the ERG thermostat today and water constantly flows,is that normal or should this stay closed untill proper temp then opens.
Bottom and top rad hoses dont really build up much pressure and stay warm and dont get very hot.

Can someone please help its,my bro is getting about 6-800 miles per tank mixed driving.

Chesers Romal
Old 11-27-2011, 12:51 PM
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Originally Posted by ROMAL
Hi new to the site looks pretty good hopefully I can get the experts to throw some light on a few issues I am hanving with my 2004 e60 530d.

The fuel consumption is extremmly low I anm getting less thtan 400 miles to a full tank.Mixed driving

Things I have done so far

New breather valve(plastic type)
Full service
New air,diesel filters

No difference in consumption.

Checked the ERG thermostat today and water constantly flows,is that normal or should this stay closed untill proper temp then opens.
Bottom and top rad hoses dont really build up much pressure and stay warm and dont get very hot.

Can someone please help its,my bro is getting about 6-800 miles per tank mixed driving.

Chesers Romal
I was in the same boat buddy , changed both main and egr stats and improved dramatically
Old 11-27-2011, 01:14 PM
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Originally Posted by daviek
I was in the same boat buddy , changed both main and egr stats and improved dramatically
Was nearly 100% but now I am,Thanks,Would the erg thermostat be the main problem,
How easy is it to get the other one out.

Thanks again Romal
Old 11-27-2011, 01:21 PM
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The main one is just below the egr cooler and your best bet is to remove and replace the two together. For somebody handy with the tools 2hrs max
Old 11-27-2011, 01:29 PM
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Originally Posted by daviek
The main one is just below the egr cooler and your best bet is to remove and replace the two together. For somebody handy with the tools 2hrs max
Ok i do both mpg was around 15-17 should I notice a big change

Cheers romal
Old 11-27-2011, 02:32 PM
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Deffo mate , 15-17 mpg is very harsh
Old 11-27-2011, 03:07 PM
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Originally Posted by daviek
Deffo mate , 15-17 mpg is very harsh
Your a legend thanks Ill let you know how I get on Thanks
Old 11-28-2011, 11:22 PM
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Theres a handy thread on thermostats here https://5series.net/forums/topic/118...1#entry1397537.
Old 11-29-2011, 04:33 AM
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Originally Posted by ROMAL
...
Can someone please help its,my bro is getting about 6-800 miles per tank mixed driving.
...
Really? 600 to 800 miles out of an 18.5 gallon tank (including reserve) with mixed driving?
more details please...
Old 11-29-2011, 04:54 AM
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Originally Posted by pcy
Really? 600 to 800 miles out of an 18.5 gallon tank (including reserve) with mixed driving?
more details please...
There will be more highway than town driving with those figures but it is possible with the bigger diesels.


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