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Discussion Starter #1
Hello guys. So as some of you guys may know that im having coolant loss issue. Was advised to check cooler but need your input on its current condition.

EGR valve has always been clean so does this mean that the EGR cooler is meant to be clean or is that always coked up no matter what. My cooler seems to be a little clean....

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Below is the inside of the EGR valve from where the cooler pipe connects to.

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Thanks guys.
 

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That looks like a normal egr pipe to me, Doesn't look like any coolant loss to inside of egr system. Is that what you're looking for?
 

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Discussion Starter #3
That looks like a normal egr pipe to me, Doesn't look like any coolant loss to inside of egr system. Is that what you're looking for?
Yea. Having coolant loss issue so trying to figure out where its leaking from.
 

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remove the two coolant pipes from your cooler and plug them, then monitor for coolant loss over a week or so.

If you stop the water from flowing around in the Egr cooler and the Egr has not been set to stay closed all the time (so if its still working)

You will melt your plastic intake manifold




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Discussion Starter #6
If you stop the water from flowing around in the Egr cooler and the Egr has not been set to stay closed all the time (so if its still working)

You will melt your plastic intake manifold




BW chiptune
Tuning BMWs since 1991
Dyno Dynamics rolling road
BW autorepairs
Over 30 year repairing BMWs
New and fully refurbished BMW Ecus
Correction of Engine ECUs Cas and key fitted to your car (key set from a different car)
Digital Service Records rest and corrections in idrive screen on 2013 onwards cars

0208 561 1818
07831 103030
Hayes
UB3 1BB
Yea i was a little unsure with this. Didnt seem safe.
 

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I've used this setup on 2x530d and 1x 320d for a number of years without problem, earlier models did'nt have a cooler at all just a straight through pipe, that's what i retrofit to do away with egr stat.
 

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If it's losing coolant somewhere, there will be brown water marks around the leaks. If the egr cooler and plumbing are all dry and clean it's not them and no need to strip it out.
I think you need to get the undertrays off and have a good look round with a torch.
 

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I've used this setup on 2x530d and 1x 320d for a number of years without problem, earlier models did'nt have a cooler at all just a straight through pipe, that's what i retrofit to do away with egr stat.
Yer it's ok mate just on the later type cars you can't do this any more
 

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He should. be able to do it on his 730d as it's not that new. Even if he only plugs the hoses short term to prove or disprove an internal cooler leak. His smoke and water consumption may go away. Maybe not.
 
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