Re: [AMC-list] bass-ackwards PCV valve!

[wrambler242@xxxxxxxxxxx]

One of things I like about the 4.0L is the lack of a PCV valve. It just uses a smallish tube valve cover to intake, a vent tube to the air box. 
   High idle vacuum sucks straight into intake. Low vacuum vents to air box and again is drawn into intake. On stock engines anyway. 
   Drawbacks are plugged tubing due to age and infrequent oil changes and blow by can oil soak the box. 
    For the most part there aren't any problems different than the old system. No valve to replace either


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-----Original Message-----
From: tom jennings <tomj@xxxxxxx>
Date: Mon, 12 Apr 2010 21:58:47 
To: AMC/Rambler owners, drivers and fans.<amc-list@xxxxxxxxxxxx>
Subject: [AMC-list] bass-ackwards PCV valve!

Woah! So there's a CV-455c pcv valve 'came with my 195.6 OHV, threads into a
"T" in the manifold, hose to the side valve cover. Fits perfectly.

The thing is, it's BACKWARDS! This valve wants suction on the HOSE side, not
the THREADED side! So basically it's a leak that you pay $5 for. Hell, I can
have all the air leaks I want for free, and with fewer parts.

It's supposed to work: high vacuum, the PCV shuts closed (OK, very small
flow), at low vacuum (eg. yo mash the go pedal) vacuum drops, the spring
pushes the plunger open and it flows a lot and ventilates the crankcase.
CV-455c fits in the hole, but that's all that's right.

The TSM has a drawing of the part, and shows HOSE at both ends.

It's amazing what you find in old cars.
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