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General E46 Forum
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Old 03-09-2010, 06:32 PM   #21
dabdibridgep
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this is a good one.

http://forums.bimmerforums.com/forum...rchid=15819655
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Old 11-20-2013, 01:46 PM   #22
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Bumping this old thread.

I'm about to change my MAF and plan to do both the upper and lower boots while I'm at it (already have the parts). Does anyone know of a decent DIY guide for just the lower boot? I found a good one for everything else but not for the lower boot. Yes, I tried Google and searched all the BMW forums.

I should also mention I got new hose clamps while I was at it. With the lower boot, it seems the issue is that the clamp screws are hard to get to. If I have a replacement clamp, should I just cut the old boot off?

Last edited by marblesmike; 11-20-2013 at 01:49 PM.
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Old 11-20-2013, 01:58 PM   #23
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I don't think you need a diy to get this done. I did the job a little while ago, the first attempt didn't work because I didn't have the right size wrench. I was trying to use SAE when I needed a 6mm. Thought I could get away with something close, definitely not. Remove the plastic firewall between the brake fluid res and the fuse box.

While you are there you should definitely clean your intake and your ICV.
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Old 11-20-2013, 01:59 PM   #24
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Also, if you search for an ICV or throttle body cleaning DIY, they would have instructiosn for removing the lower boot.
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Old 11-20-2013, 02:23 PM   #25
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Originally Posted by FenderGuy05 View Post
Also, if you search for an ICV or throttle body cleaning DIY, they would have instructiosn for removing the lower boot.
Super, thanks for the tips. And thanks for not calling me out for being a noob asking too many questions :-)
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Old 11-20-2013, 02:30 PM   #26
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I found that repositioning the clamp so that the screw part is at 12 o'clock and pointing forward, loosening the electrical box and pushing it outboard a little gives good access with a regular hex driver. Those boots all fail in the same spot, it is a gimme when I've looked at cars for people.
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Old 11-20-2013, 02:38 PM   #27
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Old 11-20-2013, 02:47 PM   #28
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it's a pretty straight forward job, to be honest.
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Old 11-20-2013, 03:01 PM   #29
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It is, for me is was just difficult with the way that the hose clamp was facing. Basically it was facing down, toward the engine, and my hands were too big to be able to do it any other way.

When you put the new lower boot on, be sure to face them in a more convenient way to hopefully make it an easier job in the future, if you ever need to do this again.
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Old 11-20-2013, 03:05 PM   #30
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The worst part is the lower hose clamp on the throttle body. Evil, evil, evil. It's situated so that it's easier to get it from under the car. I guess that's how they put it on at the factory. If you've got big hands or arms, it's not fun to get it undone

Just remember to turn it the right way when you take it off! I made it so that once I remove the ICV I can see it right there without a problem.
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Old 11-20-2013, 03:21 PM   #31
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Yeah, I never removed the throttle body, cleaned it while it was on the engine.
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Old 11-20-2013, 08:49 PM   #32
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If you're a visual guy, watch the first part of this video, he shows how everything comes off to get to the boot. But as stated, it's very simply minus the hose clamps

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Old 11-21-2013, 11:40 AM   #33
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Awesome, thanks guys. I think I got this. Of course, just as I was talking to my buddy about setting time aside for this diy this weekend my brother calls me and tells me he needs me to help him change the coolant temp sensor and an O2 sensor on his Nissan Frontier pickup...and OF COURSE there aren't any guides or videos for half of that job.
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Old 11-21-2013, 12:42 PM   #34
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Anybody read the title too fast as "lower intake BOOB JOB?"


...No?


Fvuk I'm having a strange day.
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Old 11-21-2013, 03:11 PM   #35
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Quote:
Originally Posted by umpersav View Post
Anybody read the title too fast as "lower intake BOOB JOB?"


...No?


Fvuk I'm having a strange day.
HAHAHA no idea what that would be
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Old 11-21-2013, 03:39 PM   #36
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Quote:
Originally Posted by Zell View Post
The worst part is the lower hose clamp on the throttle body. Evil, evil, evil. It's situated so that it's easier to get it from under the car. I guess that's how they put it on at the factory. If you've got big hands or arms, it's not fun to get it undone

Just remember to turn it the right way when you take it off! I made it so that once I remove the ICV I can see it right there without a problem.
The LITB was most certainly installed at the engine plant.
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Old 11-21-2013, 03:57 PM   #37
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If youre replacing the old boot, why not just cut apart the boot for easier access on clamps?

Last edited by futureSubie; 11-21-2013 at 04:22 PM.
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Old 11-21-2013, 04:06 PM   #38
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Originally Posted by AW_ZHP View Post
If your replacing the old boot, why not just cut apart the boot for easier access on clamps?
That's exactly what I was wondering.
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Old 11-21-2013, 05:02 PM   #39
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lower intake boot job

Quote:
Originally Posted by AW_ZHP View Post
If youre replacing the old boot, why not just cut apart the boot for easier access on clamps?
+1 that's how I did mine


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