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Make up air hose?

 
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Old 08 Sep 2014, 07:46 am
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Default Make up air hose?

A couple days ago I noticed that a hose from my air filter housing is missing. Did some research on it and only came up with the name. Could someone give me info as to what it does, where it connects to, and how important it is for an 07 pt cruiser non turbo-base cab?

Thanks in advance
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Old 08 Sep 2014, 08:04 am
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Default Re: Make up air hose?

The "make-up air hose", comes off the crank case to prevent emission of oil fumes into the atmosphere.

The hose takes crank case over-pressure and runs it to your air box into a sponge filter on the bottom left hand side of your air filter box. It's connected to the box by the smaller hose from the valve cover

If you don't have one, you may be putting oil on your engine somewhere.
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Old 08 Sep 2014, 08:14 am
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Default Re: Make up air hose?

Older thread:

Rubber Hose on side of air filter box
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Old 08 Sep 2014, 09:59 am
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Default Re: Make up air hose?

Some people just put a filter on the end of the hose - and don't connect it into air box.
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Old 08 Sep 2014, 10:28 am
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Default Re: Make up air hose?

Quote:
Some people just put a filter on the end of the hose - and don't connect it into air box.
This is normally a cosmetic mod.

Most of the filters that are used by modders are not made to be in an oil vapor environment. Consequently the oil vapor quickly coats the inside of the filter and it becomes air restricted. It is better to leave it connected to the air intake system or just run a hose open under the sub-frame somewhere.
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Old 08 Sep 2014, 02:38 pm
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Default Re: Make up air hose?

Quote:
Originally Posted by NitroPT View Post
This is normally a cosmetic mod.

Most of the filters that are used by modders are not made to be in an oil vapor environment. Consequently the oil vapor quickly coats the inside of the filter and it becomes air restricted. It is better to leave it connected to the air intake system or just run a hose open under the sub-frame somewhere.
I agree. I wasn't advocating it, just inputting that the hose isn't that important in the scheme of things.
I have a catch can in my hose to keep the oil out of the air intake - there isn't much at all.
I had a motorcycle with a breather hose and they had it open-ended and placed over the chain!
epis and NitroPT like this.
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