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Crankcase breather hose disconnected?

 
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Old 08 Mar 2013, 04:32 pm
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Default Crankcase breather hose disconnected?

Just recently bought a 2004 gt turbo. It seems a previous owner might have had a cold air intake on it, then at some point put an airbox back on it. The airbox seems loose, and i just now noticed the crankcase vent hose is just pointing down (not attached to anything). Isn't there supposed to be a pcv valve and/or connected to the airbox? There's nothing on the airbox to hook it to. I'm wondering if they put the wrong box on this car. Does anyone have a pic of this for this car?
Thanks.
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Old 08 Mar 2013, 05:46 pm
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Default Re: Crankcase breather hose disconnected?

The air boxes are rubber soft mounted and may seem lose but that is normal. The vent tube can be left un-connected but not proper for emissions. It will not hurt engine performance if it not connected. You must have it connected to comply with any emission regulated required in your state if any?
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Old 08 Mar 2013, 08:23 pm
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Default Re: Crankcase breather hose disconnected?

Guys will do this if there's lots of blow-by (Cracked piston) so airbox doesn't fill with oil.
Some vehicles used a second air filter, others (like the PT) use the engine filter-
It probably won't make much of a difference unless you're in extremely dusty conditions, but by all rights it should have some sort of filter
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Old 08 Mar 2013, 10:01 pm
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Default Re: Crankcase breather hose disconnected?

Thanks for the replies. I just had it smogged a week ago, surprised they didn't catch it (California's pretty anal). I'm going to have take a closer look at the airbox tomorrow. It rattles pretty bad, and seems to be only held in place by the hoses attached.
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Old 09 Mar 2013, 12:51 pm
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Default Re: Crankcase breather hose disconnected?

Quote:
Originally Posted by UptownSport View Post
Guys will do this if there's lots of blow-by (Cracked piston) so airbox doesn't fill with oil.
Some vehicles used a second air filter, others (like the PT) use the engine filter-
It probably won't make much of a difference unless you're in extremely dusty conditions, but by all rights it should have some sort of filter
but the vent side blows not sucks so a filter really doesn't matter. With regards to an engine














Quote:
Originally Posted by roaoro View Post
Thanks for the replies. I just had it smogged a week ago, surprised they didn't catch it (California's pretty anal). I'm going to have take a closer look at the airbox tomorrow. It rattles pretty bad, and seems to be only held in place by the hoses attached.











Please no comments about my battery cables condition!
Itsanother project in the works to relocate the complete battery.
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Old 09 Mar 2013, 09:35 pm
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Default Re: Crankcase breather hose disconnected?

Quote:
Originally Posted by NitroPT View Post
but the vent side blows not sucks so a filter really doesn't matter. With regards to an engine
Actually it does both, in particular on the turbo models. When under boost conditions the PCV closes (or it's supposed to, some leak) and blow-by can get past the piston rings so to prevent pressure build up in the crankcase, the vapors "blow" out into the airbox through that hose. But under 0 boost, high vacuum conditions the PCV is open and the intake manifold "sucks" so air is drawn into the crankcase from the airbox via the same hose.
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Old 10 Mar 2013, 02:52 pm
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Default Re: Crankcase breather hose disconnected?

Quote:
Originally Posted by NitroPT View Post
but the vent side blows not sucks so a filter really doesn't matter. With regards to an engine



























Please no comments about my battery cables condition!
Itsanother project in the works to relocate the complete battery.

Thanks for the very detailed pics! After looking a little closer at my airbox, I found that the nipple was broken clean off of the airbox and still stuck in the breather hose... I guess i'll be heading to the junk yard today.
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Old 06 Feb 2014, 10:11 pm
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Default Re: Crankcase breather hose disconnected?

Quote:
Originally Posted by NitroPT View Post
but the vent side blows not sucks so a filter really doesn't matter. With regards to an engine






Please no comments about my battery cables condition!
Itsanother project in the works to relocate the complete battery.
Quote:
Originally Posted by 2step View Post
Actually it does both, in particular on the turbo models. When under boost conditions the PCV closes (or it's supposed to, some leak) and blow-by can get past the piston rings so to prevent pressure build up in the crankcase, the vapors "blow" out into the airbox through that hose. But under 0 boost, high vacuum conditions the PCV is open and the intake manifold "sucks" so air is drawn into the crankcase from the airbox via the same hose.

2step is correct. Darryl over at DCR has been preaching this for years.

The hose connection is on the lower right end of the cam cover in that picture.

Jerry
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Old 07 Feb 2014, 12:18 am
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Default Re: Crankcase breather hose disconnected?

I had my Dyers set up on the breather hose at idle pulling 18.5hg
Nothing was indicating on the gauge! Glad to do a video next month after I get my new GO Pro. Not exactly sure what DCR was talking about?

I am wondering why this was brought up after almost a year?
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Old 07 Feb 2014, 08:09 am
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Default Re: Crankcase breather hose disconnected?

Quote:
Originally Posted by NitroPT View Post
I had my Dyers set up on the breather hose at idle pulling 18.5hg
Nothing was indicating on the gauge! Glad to do a video next month after I get my new GO Pro. Not exactly sure what DCR was talking about?

I am wondering why this was brought up after almost a year?
Some posts still new to those who have been gone for a while.
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