what is this inside my air cleaner? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ncsurveyor · 05-14-2020, 08:49 AM

Anybody know what this is and why its just laying loosely through the side of the air cleaner?
Its that piece of white plastic with some type of filter material on the inside of it. The tube part has threads on it and a cotter pin and its just loosely laying in there....

geezer#99 · 05-14-2020, 09:11 AM

That’s the filter for the air supply to the passenger side valve cover. Part of the pcv system.
Should be a short hose connected to a tubing elbow that is plugged into the valve cover.

Couple pics in here.

https://www.autozone.com/repairguide...00c1528007d806

ncsurveyor · 05-14-2020, 09:42 AM

Ahh, I see, it must have worked its way loose. I found the hose and plugged it back up. I noticed the truck has been running rough the last couple of days, could this be the cause?

Davidf · 05-14-2020, 09:49 AM

No, will not cause rough running. It is just a passive filter to ensure clean air is drawn into the engine if/when the crankcase goes under vacuum (i.e. PCV).

ncsurveyor · 05-14-2020, 09:51 AM

Oh ok, thanks for the help!

**special-K** · 05-14-2020, 10:31 AM

If your PCV valve is clogged it will cause the truck to run rough

ncsurveyor · 05-14-2020, 11:46 AM

It could just be my imagination but it just seems to be bogged down/choked down, not running quiet as smooth as it was...I thought maybe i needed to rotate the entire assembly to allow more cold air into the cleaner but I can't really rotate it much and still connect that hose.

68Stepbed · 05-14-2020, 12:34 PM

Dime bag hideaway?

54blackhornet · 05-14-2020, 01:20 PM

Pull your PCV valve and shake it, rattling sound and your good. No rattling replace it.

**special-K** · 05-14-2020, 02:10 PM

Quote:

Originally Posted by ncsurveyor

It could just be my imagination but it just seems to be bogged down/choked down, not running quiet as smooth as it was...I thought maybe i needed to rotate the entire assembly to allow more cold air into the cleaner but I can't really rotate it much and still connect that hose.

That's what a clogged PCV can do. I see a lot of blow-by around that other filter.

You are saying it was laying loose? How tight did it fit the hose? Is the hose loose and splayed? I'm wondering if it didn't blow off

Quote:

Originally Posted by 68Stepbed

Dime bag hideaway?

Who told you?

Quote:

Originally Posted by 54blackhornet

Pull your PCV valve and shake it, rattling sound and your good. No rattling replace it.

Yep. You could shoot it with carb cleaner and see if it frees up, but time for new anyway

ncsurveyor · 05-14-2020, 09:22 PM

Quote:

Originally Posted by special-K

That's what a clogged PCV can do. I see a lot of blow-by around that other filter.

You are saying it was laying loose? How tight did it fit the hose? Is the hose loose and splayed? I'm wondering if it didn't blow off

Who told you?

Yep. You could shoot it with carb cleaner and see if it frees up, but time for new anyway

I got the hose back on pretty tight, it’s not splayed. Time for a new what? PCV valve or filter? How do I remove the pcv valve? I tried pulling it up out of the valve cover but it didn’t want to budge and I didn’t want to force it.

**special-K** · 05-15-2020, 07:15 AM

Yes, the PCV valve. They can get baked into position. It will come out, it has to come out. You will need a new grommit, too. It is baked hard

68Stepbed · 05-15-2020, 08:54 AM

Quote:

Originally Posted by special-K

Who told you?

I plead the 5th.

bry593 · 05-15-2020, 11:46 AM

Judging by the grime on the "clean" side of the air filter, I'd wager you have more problems than a stuck pcv.

05-14-2020, 08:49 AM	#1
ncsurveyor Registered User Join Date: Feb 2020 Location: Lenoir NC Posts: 110	what is this inside my air cleaner? Anybody know what this is and why its just laying loosely through the side of the air cleaner? Its that piece of white plastic with some type of filter material on the inside of it. The tube part has threads on it and a cotter pin and its just loosely laying in there.... Attached Images

05-14-2020, 09:11 AM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,751	Re: what is this inside my air cleaner? That’s the filter for the air supply to the passenger side valve cover. Part of the pcv system. Should be a short hose connected to a tubing elbow that is plugged into the valve cover. Couple pics in here. https://www.autozone.com/repairguide...00c1528007d806

05-14-2020, 09:42 AM	#3
ncsurveyor Registered User Join Date: Feb 2020 Location: Lenoir NC Posts: 110	Re: what is this inside my air cleaner? Ahh, I see, it must have worked its way loose. I found the hose and plugged it back up. I noticed the truck has been running rough the last couple of days, could this be the cause?

05-14-2020, 09:49 AM	#4
Davidf Registered User Join Date: Nov 2014 Location: Austin Posts: 749	Re: what is this inside my air cleaner? No, will not cause rough running. It is just a passive filter to ensure clean air is drawn into the engine if/when the crankcase goes under vacuum (i.e. PCV).

05-14-2020, 09:51 AM	#5
ncsurveyor Registered User Join Date: Feb 2020 Location: Lenoir NC Posts: 110	Re: what is this inside my air cleaner? Oh ok, thanks for the help!

05-14-2020, 10:31 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: what is this inside my air cleaner? If your PCV valve is clogged it will cause the truck to run rough __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

05-14-2020, 11:46 AM	#7
ncsurveyor Registered User Join Date: Feb 2020 Location: Lenoir NC Posts: 110	Re: what is this inside my air cleaner? It could just be my imagination but it just seems to be bogged down/choked down, not running quiet as smooth as it was...I thought maybe i needed to rotate the entire assembly to allow more cold air into the cleaner but I can't really rotate it much and still connect that hose.

05-14-2020, 12:34 PM	#8
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: what is this inside my air cleaner? Dime bag hideaway? __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

05-14-2020, 01:20 PM	#9
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,400	Re: what is this inside my air cleaner? Pull your PCV valve and shake it, rattling sound and your good. No rattling replace it. __________________ 71 C-20 07 Magnum RT AWD

05-15-2020, 07:15 AM	#12
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: what is this inside my air cleaner? Yes, the PCV valve. They can get baked into position. It will come out, it has to come out. You will need a new grommit, too. It is baked hard __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

05-15-2020, 11:46 AM	#14
bry593 Registered User Join Date: May 2016 Location: Oklahoma Posts: 201	Re: what is this inside my air cleaner? Judging by the grime on the "clean" side of the air filter, I'd wager you have more problems than a stuck pcv. __________________ 1971 C20 Custom Deluxe, HT383, 4L80E, 3.73 Locker, 4 Wheel Discs



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