Vaccum pump and EGR cooler residue -could this be a clue to my regens?

DanMZe90 · 02-20-2023, 03:13 PM

Hi, I wrote about my 'too many regens' problem here:

https://www.e90post.com/forums/showthread.php?t=1958146

I haven't looked in the engine bay but today I noticed a black gunk on the vacuum pump, the egr cooler below it and, if the same residue, on the turbo pipe further down. Is this a clue as to what is happening regarding my excessive soot buildup? I can't see anything noticeably leaking (exhaust fumes or liquid) when I watch it at idle.

The only work I've done in that region over the last few months is cleaning the EGR, the MAF sensor and replacing the egr and main thermostats so not sure if I've inadvertently done something...

Thanks

Dan

Andystobbs · 02-20-2023, 03:43 PM

Is it using oil?

DanMZe90 · 02-20-2023, 03:50 PM

Quote:

Originally Posted by Andystobbs

Is it using oil?

No, level is normal.

DanMZe90 · 02-21-2023, 09:35 AM

After a bit if Googling it looks like the vacuum pump has an oil leak which might be repairable with new seals. Not sure if that would affect anything like regens, seems mostly to affect the brakes if I read correctly. Ah well, something else to sort out!

02-20-2023, 03:13 PM	#1
DanMZe90 Private First Class 20 Rep 107 Posts Drives: BMW E90 330D SE Join Date: Jan 2012 Location: Devon iTrader: (0)	Vaccum pump and EGR cooler residue -could this be a clue to my regens? Hi, I wrote about my 'too many regens' problem here: https://www.e90post.com/forums/showthread.php?t=1958146 I haven't looked in the engine bay but today I noticed a black gunk on the vacuum pump, the egr cooler below it and, if the same residue, on the turbo pipe further down. Is this a clue as to what is happening regarding my excessive soot buildup? I can't see anything noticeably leaking (exhaust fumes or liquid) when I watch it at idle. The only work I've done in that region over the last few months is cleaning the EGR, the MAF sensor and replacing the egr and main thermostats so not sure if I've inadvertently done something... Thanks Dan Attached Images
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02-20-2023, 03:43 PM	#2
Andystobbs Captain 196 Rep 720 Posts Drives: E91 Lci, Vectra B V6 Join Date: Sep 2019 Location: Chester, South Wirral iTrader: (0)	Is it using oil?
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02-21-2023, 09:35 AM	#4
DanMZe90 Private First Class 20 Rep 107 Posts Drives: BMW E90 330D SE Join Date: Jan 2012 Location: Devon iTrader: (0)	After a bit if Googling it looks like the vacuum pump has an oil leak which might be repairable with new seals. Not sure if that would affect anything like regens, seems mostly to affect the brakes if I read correctly. Ah well, something else to sort out!
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