61 PCV emission valve

[Richard P.]

My '61 is a California car and has the PCV valve instead of the road draft tube. My question is whether the PCV valve is to be painted, and if so what color?
Thanks

[Mike E.]

Re: 61 PCV emission valve

It was blackish--I'd call it black oxide because it was a plating, not a paint. Originals are tough to find.

[Joe L.]

Re: 61 PCV emission valve

My '61 is a California car and has the PCV valve instead of the road draft tube. My question is whether the PCV valve is to be painted, and if so what color?
Thanks

Richard-----


Like this:

[Richard P.]

Re: 61 PCV emission valve

I think I must have used the wrong term. According to Paragon parts there is a picture of what they illustrate as a PCV (part #4318) but the description calls it a Crankcase Vent Tube. It says for only '61 FI engine. Does anyone know if this could have been on a non-FI car? If so, what color would it have been painted? Sorry for the confusion.

[Stuart F.]

Re: 61 PCV emission valve

Richard;

Where does this PCV mount? In the oil fill tube? If so, it probably doesn't matter if it were a fuelie or not as hose end could connect to any vacuum port, be it at a carb base or on a plenum.

Stu Fox

[Richard P.]

Re: 61 PCV emission valve

It mounted in the hole behind the distributor where the crankcase vent tube (road draft tube) goes.

[Mike E.]

Re: 61 PCV emission valve

1961 only, as I recall, used a substitute for a crankcase vent tube (California equipped RPO242) that had a threaded female section into which the PCV valve threaded. I don't think that was only FI (I'm at work and my resources are at home).
By 62 the RPO242 fitting had a nipple on it that accepted a hose, and the PCV valve threaded into the fitting on the carb and had a hose from it to the RPO242 fitting.

[Stuart F.]

Re: 61 PCV emission valve

Thats a first for me. Any way you could post a photo of the mounting? I'd like to see if it has any potential for other applications, what with the interest in new/replacement later engine swaps of late.

Stu Fox

[Jack H.]

Re: 61 PCV emission valve

Shouldn't be a mystery here. Check your copy of the AIM book under option RPO 242. The 2-page sequence depicts the basic components followed by their interconnect for specific engine configurations...

[Stuart F.]

Re: 61 PCV emission valve

Jack;

Thanks for including the pictures from the AIM. As complete as my library is, I'm afraid it doesn't include any AIM's except C-2, and specifically the 63. I've been kicking around the idea of pulling my original engine and substituting a later one. Usually the crankcase ventilation system is of concern, specially if you want to make it look as close to the original as possible.

Stu Fox

[Stuart F.]

Re: 61 PCV emission valve

Based on the pictures fron the AIM that Jack supplied, I trust the original question has been answered. It seems we were talking apples and oranges here. The PCV valve use on the California C-1 (61) seems to be a combination of the old draft tube hooked up from the back of the block to the valve at the base of the carb, similar to the first "country-wide" application on the 63. The valve itself, therefore, should be as those used on all other applications, i.e. zinc plated or black/blue coating (depending on brand), and NOT painted. The draft tube end of the connection is another matter; whether it should be painted black, as many tubes were, or engine orange is the question (and an interesting one at that). I don't know if that has been answered as yet.

Stu Fox

[John H.]

Re: 61 PCV emission valve

The draft tube end of the connection is another matter; whether it should be painted black, as many tubes were, or engine orange is the question (and an interesting one at that). I don't know if that has been answered as yet.

Stu Fox

Stu -

There was no draft tube with RPO 242 - only the "adapter" (shown on the AIM sheet on the left that Jack posted), which was installed at St. Louis (and dip-primed semi-gloss black). ALL of the components shown on the AIM sheets with a part number callout were installed at St. Louis, so none of them would have any orange paint.

[Stuart F.]

Re: 61 PCV emission valve

John;

I understand from the AIM drawings that there is no draft tube on that RPO. I was simply using the name "Draft Tube" as a reference point for where the adapter is now positioned/mounts to the block. The same connection, or similar one, exists on a 63 327 C.I. only it is filled with a grommet into which the PCV tube is inserted. It may or may not be the same size connection, but I'm sure it is in the same spot and functions the same (flow direction as the 63). You could say that the 64 and beyond flow is the reverse of the 63, right?

Stu Fox

[John H.]

Re: 61 PCV emission valve

It may or may not be the same size connection, but I'm sure it is in the same spot and functions the same (flow direction as the 63). You could say that the 64 and beyond flow is the reverse of the 63, right?

Stu Fox

Stu -

That's correct - the crankcase ventilation airflow was reversed in 1964, and remained that way until the rear vent hole in the block disappeared and both PCV connections moved to the valve covers.

[Richard G.]

Re: 61 PCV emission valve

I purchased my 61 270hp car in '68. I am second owner. It is a California car with PVC smog stuff. None of the fittings are painted they are plated a sliver gray color. The hose to the base of the back carb has AC markings in white.