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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Jul-31-2010, 11:28:30 AM   #51
sic
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Quote:
Originally Posted by MisterEm View Post
No sir. It's on the passenger side of the motor, above the heatshield, and over the headers. There is a pre-bent plastic hose that connects the pump to the valve as well.

I replaced the hose and and the valve and the random AA code disappeared.

Hope this helps,
Mike
I already replaced the valve and the hose... the pump now aswell... and I am searching now, why isn't the pump woirking, what makes it work, switch, relay, temp sensor...clueless for now
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Old Sat, Jul-31-2010, 07:49:15 PM   #52
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anybody had similar issue ? my dealership in no help at all...
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Old Thu, Jul-05-2012, 06:03:06 PM   #53
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Default Re: secondary air pump replacement

I've seemed to notice a fan/"whirring" noise lately even when the car is warmed up (and its been quite warm here in DC lately). It is a very constant rpm/pitch, not changing with revs or speed, so it doesn't seem like something like a cooling fan or some other engine-associated component. When I turn the car off, I can hear it "wind down" for a few seconds after the engine-proper stops. Its not particularly loud or anything, but I'm worried that if I can hear it, it might indicate a part starting to go bad and perhaps I could do a preemptive fix.

The only thing I can think of, a motor or something unattached to the engine, would be the exhaust air pump coming on inappropriately. Is there any experience of this occuring? If so, why and how to solve? If not, what could be causing that noise? I thought it might be the AC fan, but I could hear it with the AC fan turned down and off (I'll double-check that though to be sure.)

PS. There is no check engine lights or any other symptoms really, just the noise.
PPS. I did have the cats replaced fairly recently.
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Old Fri, Jul-06-2012, 01:20:47 PM   #54
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Default Re: secondary air pump replacement

I suggest Evolve tune with SAP delete...
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Old Fri, Jul-06-2012, 03:14:29 PM   #55
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Default Re: secondary air pump replacement

Did check a bit more and the noise seems to come more from the front of the motor rather than from around the SAP, which seemed fine along with the connecting hose.

It only happens when warm, the opposite of when the SAP is supposed to operate, IIRC, and as I mentioned, doesn't particularly closely match the engine revs. It tends to slowly drop a bit in pitch/volume (5-10 seconds) after the motor idles.

It sounds more like a whir than a whine or more mechanical growl.

I did have the belt tensioners replaced recently though the alternator is original. The fan was not moving either, guess the motor wasn't that hot(?).

Again, no codes thrown and no other symptoms, just seem to be noticing it recently. Am I just being paranoid/hyper-vigilant or might there be a real issue or concern here?
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Discussing secondary air pump replacement in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)