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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 12-11-2013, 08:57 PM   #1
CJin2552
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Does anyone know what this is?

I don't see a name or anything on it, and is it important for driving? (Can the engine function for a short time without it?)

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Old 12-11-2013, 09:00 PM   #2
Teddy7
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It's the check valve for your secondary air pump. I deleted the valve and pump with a block off plate within a few weeks of buying my car.
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Old 12-11-2013, 09:03 PM   #3
CJin2552
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Does anyone know what this is?

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Originally Posted by Teddy7 View Post
It's the check valve for your secondary air pump. I deleted the valve and pump with a block off plate within a few weeks of buying my car.
The small hose on mine just snapped, so since it is just air, do you think tape would do the job?
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Old 12-11-2013, 09:12 PM   #4
Teddy7
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Yes, it's just a vacuum line, but make sure you seal it well. The secondary air pump (SAP) only runs for like the first minute after start up anyway.
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Old 12-11-2013, 09:16 PM   #5
CJin2552
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Does anyone know what this is?

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Originally Posted by Teddy7 View Post
Yes, it's just a vacuum line, but make sure you seal it well. The secondary air pump (SAP) only runs for like the first minute after start up anyway.
Alright, thanks a bunch.


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Old 12-11-2013, 09:17 PM   #6
unevolved
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Re: Does anyone know what this is?

Heat Shrink tubing is currently holding mine together. No problems so far.
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Old 12-11-2013, 09:18 PM   #7
CJin2552
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Does anyone know what this is?

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Originally Posted by unevolved View Post
Heat Shrink tubing is currently holding mine together. No problems so far.
I think I have some heat shrink laying around somewhere, thanks a bunch for the advice.


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Old 12-11-2013, 09:44 PM   #8
saace7
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you can get a foot or two of vac line for a dollar or two at autozone? don't be cheap. replace it correctly
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Old 12-11-2013, 11:18 PM   #9
hitbyastick
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you can get a foot or two of vac line for a dollar or two at autozone? don't be cheap. replace it correctly
Yes. Vac line is cheeeeeep. The rest of that length of original vacuum line could be cracked & leaking vacuum. I don't think tape or heat shrink tubing could be called an acceptable repair.
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Old 12-12-2013, 05:50 AM   #10
unevolved
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Mine actually broke farther up the line on the rigid part, couldn't really replace that line.
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Old 12-12-2013, 05:16 PM   #11
CJin2552
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Join Date: Feb 2013
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Does anyone know what this is?

Quote:
Originally Posted by hitbyastick View Post
Yes. Vac line is cheeeeeep. The rest of that length of original vacuum line could be cracked & leaking vacuum. I don't think tape or heat shrink tubing could be called an acceptable repair.
I was just looking for a temporary fix, I don't want to not be able to drive because of a vacuum line.


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