CCV/PCV hose help
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,682
Likes: 3
From: Coatesville PA
CCV/PCV hose help
My ccv(pcv) molded hose from the manifold to the passenger valve cover is quite messed up. Fitting it goes in into the valve cover is causing the hose to be loose i think, plus its cracked at the end into the manifold. So, long story short dealer said they're discontinued, searched threads and guy posted saying same thing in 05 lol. So anybody have any ideas as to a replacement or if not anyone have one for sale? I know some people say to put a breather filter on the valve cover side but what about the manifold port? Thanks in advance all.
Instructor
Joined: Mar 2006
Posts: 127
Likes: 0
From: Stockbridge GA
You probably can get the hose from some of the aftemarket suppliers like Ecklers. I do not know if on the LT1 the hose has a different size opening at each end like the L98 does, but I used a step down inbetween 2 hoses and did it that way. Works great.
Instructor
Joined: Nov 2009
Posts: 164
Likes: 2
From: Spring Texas
Replacement of discontinued PVC hose
Bend 3/8's copper tubing (I used an old sink valve to facet -chrome) into a 180 degree 'U'. Bend around a bending jig ficture to keep from collapsing. Aviable from any toolsource. Now install with 1 inch sections of rubber hose with hose clamps. If 1st attempt is too long for space avilable, cut down until it fits.
Pro
Joined: Oct 1999
Posts: 515
Likes: 0
From: Nashua NH
I wouldn't do that...these engines don't like unaccounted for air entering them. If you put a breather on without it getting the air from the TB (which first has to pass through the MAF), it will idle wacky, and generally run like crap.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The air that goes into the valve cover has gone through the MAF and is therefore accounted for in the AFR calculation. Putting on a breather valve creates a vacuum leak.
Team Owner
Joined: Sep 2003
Posts: 25,393
Likes: 2,741
My ccv(pcv) molded hose from the manifold to the passenger valve cover is quite messed up. Fitting it goes in into the valve cover is causing the hose to be loose i think, plus its cracked at the end into the manifold. So, long story short dealer said they're discontinued, searched threads and guy posted saying same thing in 05 lol. So anybody have any ideas as to a replacement or if not anyone have one for sale? I know some people say to put a breather filter on the valve cover side but what about the manifold port? Thanks in advance all.
The grommet and the connector at the VC are both I'm quite sure still available (GM# 10240678 & 12550625). The pipe is NOT but I believe could be fabricated easily. I've never owned an LT1 (any year) and this subject was discussed recently. There's some good snapshots showing '92 and then the '93+ Corvette.
In the last post "JoeC" posted a snapshot of the correct GM# 10186200 tube. I would think a creative soul could "create" a very functional substitute. In '94 that tube and the connector (I mentioned) I believe were assembled as 1 part # and that's different from the 10186200.
The OP in that thread "stumbled upon" a HOSE (not correct) but would likely be a potential substitute for the later. Will it/would it? Perhaps you might like to find out.
GM# 10128365 is that part # and is available from several sources.
The thread is here:
https://www.corvetteforum.com/forums...body-part.html
If you decide to buy/try or fabricate a "fix" post back!!
Last edited by WVZR-1; Apr 14, 2016 at 03:03 AM.
Instructor
Joined: Sep 2015
Posts: 126
Likes: 11
From: Hawaii/Utah
quick question and slight hijack, but why do some LT1's seem to have the PCV valve attached to a U shaped hose and going right back in to the next fitting on the intake, whereas the Chiltons and many other photos/info out in cyberspace show a t shaped fitting with an additional hose running to the front and attaching under the throttle body?
Also, I can't seem to get the hose off to replace the PCV valve? Do I just need to pull harder on the dang hose?
Team Owner
Joined: Sep 2003
Posts: 25,393
Likes: 2,741
quick question and slight hijack, but why do some LT1's seem to have the PCV valve attached to a U shaped hose and going right back in to the next fitting on the intake, whereas the Chiltons and many other photos/info out in cyberspace show a t shaped fitting with an additional hose running to the front and attaching under the throttle body?
Also, I can't seem to get the hose off to replace the PCV valve? Do I just need to pull harder on the dang hose?
I would say you need a little more of a "tug" but I'm not there with hands on.
You seem to be doing quite well with the car - you've not been around much recently - enjoying the drive?
Last edited by WVZR-1; Apr 15, 2016 at 07:44 PM.
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Instructor
Joined: Sep 2015
Posts: 126
Likes: 11
From: Hawaii/Utah
Thanks WVZR-1. Yes, she is running well now. I am having the Trans checked out though, she has started to clunk under hard shifting, I thought I just had an oil leak but I am now wondering if the tranny was also leaking and I was missing the mix of fluids, because the trans seemed fine until just recently.
I wanted to change the PCV because it's so cheap, and theoretically easy LOL!
I wanted to change the PCV because it's so cheap, and theoretically easy LOL!
Racer
Joined: Sep 2011
Posts: 462
Likes: 30
From: Riverside California
My ccv(pcv) molded hose from the manifold to the passenger valve cover is quite messed up. Fitting it goes in into the valve cover is causing the hose to be loose i think, plus its cracked at the end into the manifold. So, long story short dealer said they're discontinued, searched threads and guy posted saying same thing in 05 lol. So anybody have any ideas as to a replacement or if not anyone have one for sale? I know some people say to put a breather filter on the valve cover side but what about the manifold port? Thanks in advance all.
Instructor
Joined: Sep 2015
Posts: 126
Likes: 11
From: Hawaii/Utah
Same here, but I think the OP's problem is the other end of the hose where it goes into the valve cover. And this is where clean air vents IN to the crankcase, the other side of the intake manifold has the actual PCV valve, seen in my previous photo in post #7.
Last edited by beachfreak; Apr 16, 2016 at 04:47 PM.
