Author Topic: Airfilter Door  (Read 213 times)

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Offline Fourwayz

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Airfilter Door
« on: August 10, 2017, 09:26:01 pm »
 I changed oil today and ALSO cleaned the K&N. What a surprise I got. I took the filter door off and found that it was bowed...badly. To the point that it was not sealing. I'm pretty sure it SHOULD be flat. Any who, I gingerly heated it until I could get it basically flat. I couldn't find a foam strip to match from the auto parts store small enough. Soooo outside the box I went and super glued the smallest vacuum hose to the door to seal it. It sealed better than no foam at all! I'll get the "proper" seal ASAP. It works!


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Online worncog

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Re: Airfilter Door
« Reply #1 on: August 10, 2017, 10:07:29 pm »
I recently replaced the door on my 2006 airbox. Warped and lost seal. TOTALLY changed my a/f ratio.
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'14 S10, '06 C10, '74 R75/6 Hack, '72 XS650

Offline Fourwayz

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Re: Airfilter Door
« Reply #2 on: August 10, 2017, 10:30:40 pm »
I went out on a test tun and noticed the difference right away.
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Offline dboogie2288

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Re: Airfilter Door
« Reply #3 on: August 11, 2017, 10:25:37 am »
Another way to do it is use RTV and saran wrap. Steves airbox repair video shows him doing it, and I like it better than foam. Doesnt break down and if you need to remove it and start fresh it's pretty easy.
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Online worncog

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Re: Airfilter Door
« Reply #4 on: August 11, 2017, 10:31:54 am »
I would keep an eye on it, as the plastic may have developed a new 'memory' and returns to new warped configuration.

My warped door puked the seals 1500 miles from home and took me a while to figure it out. Missing and stumbling at low rpm and then smoothing out at or above mid-range. Kinda like clogged pilots or bad fuel. Had a similar issue with the same symptoms a couple years ago and it turned out to be a cracked stick coil...so I though it could be same malady.

Is your airbox reinforced at the lower front seam? Summer heat likes to 'reform' plastics. Oh, and a new door is like $10.
Somewhere far away. Soon
RWTW, BVF, ...

'14 S10, '06 C10, '74 R75/6 Hack, '72 XS650

Offline Ranger Jim

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Re: Airfilter Door
« Reply #5 on: August 11, 2017, 11:35:47 am »
Seems to me like K&N filters are just a tiny bit larger than OEM filters and have a tendency to crack the airbox, hence SISF's airbox reinforcement technique.
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Offline dboogie2288

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Re: Airfilter Door
« Reply #6 on: August 11, 2017, 12:00:52 pm »
I've been running K&Ns in my connies for 10 years now and never had a problem. Just have to have a gentle touch when putting the tension bar back in......dont cram it in there. It needs to delicately get into the groove and that way you wont split the box. That said, K&N doesnt really have a compress-able gasket...its a firmer rubber so its all about finesse.
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