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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 Mon, Oct-22-2018, 03:58:47 PM   #1
ATB88
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Default Dumb question on intake manifold cleaning

Picked up a used 6MT airbox to replace my SMG airbox post-conversion. It's got a good amount of gunk in it and I'd like to thoroughly clean it before installing it.

Feels like I'm worrying too much but figure it's better to ask and be ridiculed than find myself in an annoying situation: I'd like to just dump the whole thing in a tub of hot water and simple green, soak it, wipe out the inside, and let it dry. I'm concerned that if I do this, water + cleaner will seep in between the connection to the 6 hoses to the ITBs and the manifold itself and not dry properly and cause vacuum problems. The solution would be to take the hoses off and put them back on after, but it looks like the clamps on the manifold side of the hoses are one time use (unlike on the ITB side of the hose) so I'd have to get new ones and the special crimping tool etc which is annoying.

Is my concern valid, or am I just being dumb and I can just soak it in a tub as intended with the hoses on.
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Old Mon, Oct-22-2018, 04:15:28 PM   #2
HassanEido
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Default Re: Dumb question on intake manifold cleaning

Power wash it
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Old Mon, Oct-22-2018, 04:52:19 PM   #3
Texaz3
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Default Re: Dumb question on intake manifold cleaning

I din't think this is anything to worry about. Just dump it in simple green bath, let it soak, then power wash it. Should be fine.
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Old Mon, Oct-22-2018, 04:55:57 PM   #4
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Default Re: Dumb question on intake manifold cleaning

Yup, it's just a big piece of plastic
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Old Mon, Oct-22-2018, 05:02:31 PM   #5
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Default Re: Dumb question on intake manifold cleaning

You are thinking about it too much. A light solvent to clean the plastic trumpets and leave the rest. No need to have it squeaky clean on the inside.
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Old Tue, Oct-23-2018, 04:52:10 AM   #6
M spec
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Default Re: Dumb question on intake manifold cleaning

Bring it by when you stop in for service and Iíll have it cleaned in our parts washer for you!
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Discussing BMW upset with E46 M3 enthusiasts 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)