'62 PCV valve part number

[Jon Elliott]

I'm traveling and believe I have located the elusive PCV valve for my 62 FI car. The problem is that I don't have my reference guide with me. Can someone confirm if the part number is CV590?

Thanks in advance, Jon

[Mike E.]

Re: '62 PCV valve part number

Jon--
That's correct, but it's not correct. The original part was a black-oxide type finish, able to be disassembled and cleaned, and had the 7-digit part number stamped on it. The CV590 is a replacement that works, but does not appear as the original. In addition, that's a really easy piece to locate. Don't pay much for it.

[Joe L.]

Re: '62 PCV valve part number

Jon and Mike-----

Yup; that's how it is. The CV-590C is the right REPLACEMENT valve and it's 100% functional, but it's not the original or configured like the original. The CV-590C, aka GM #6421934, is still available from GM dealers for about 25 bucks, LIST. About 15 bucks through Delco dealers. So, you don't want to pay more than that for it.

The original was CV-202. So, what's one look like? See below.

[Dennis C.]

Ventilation Valve... Joe/Mike...

...Would we expect to see the white tag with I.D. info and "flow arrow" on a
factory install? DC

[Joe L.]

Re: Ventilation Valve... Joe/Mike...

Dennis-----

The one pictured has the white band, but I slipped it off for the photo. I don't know if PRODUCTION valves had the white band, or not. I expect not, though, for 2 reasons:

1) it really wouldn't have been necessary for PRODUCTION since the assmbly line workers should have known how to install the valve;

2) the band is made from a very thin and relatively fragile plastic material. The glue used to fasten the ends was not heat resistant. I don't think that it would have survived very long if it had been installed.

[mike mccagh]

Re: Ventilation Valve... Joe/Mike...

Joe: me thinketh you just pooped in the dipstick's wheaties. he was gettin ready to tool up for production of the white plastic bands. had his chainsaw sharpened and his sharpie full of ink. happy turkey day. mike

[Mike E.]

Re: Ventilation Valve... Joe/Mike...

Dennis--the undisputed original I have has no white/red band on it because "flow" with an arrow is stamped on the body, along with the original GM part number (which is the 7-digit number, not 590c)

[Michael H.]

Re: Ventilation Valve... Joe/Mike...

Mike,

I agree, I believe no "assembly line" installed valves had the paper tag. This also would include the slightly differently shaped black 590 for the 63 run. It's my opinion that the tag was only on valves sold through service.

The preproduction pictures seen in service manuals may show the tag on new 62's/63's but I believe this was a result of service parts being used and assembled on pilot run cars. There would have been no need for an ID tag at the Mill during the actual run as there was only one part number used on all 62-63 Corvettes.

[Dennis C.]

So Does This Mean...

I shouldn't have spent $500 on eBay for one of these tags...???

[Michael H.]

Re: So Does This Mean...

Ah....well....maybe I should delete my previous post until you have a chance to resell the tag on ebay? Should easily be worth the $500 that you paid for it. (plus $68. for shipping/handling)

[Joe L.]

Re: Ventilation Valve... Joe/Mike...

Mike-----

The CV-202 valve that I have has both the stamping with small arrows as well as the white band. The stamping is "to manifold" with small directional arrows on either end. I believe that all of the valves had the stamping, regardless of whether they also had the band. However, I do believe that only the SERVICE valves had the band. One of the valves I have (the one I pictured) is from 1962. The other is a later SERVICE valve, probably from from about 1964-65 (the CV-202 was discontinued in May, 1966).

Now, for another important matter on this subject. I've never been able to find from GM information that the CV-202 was used on 1962 Corvettes. That information came from Dale Pearman. Dale said that he had extensively researched the subject and felt that the CV-202 was the valve used for 1962 Corvettes. Given Dale's "affinity" and "attachment" to 1962 Corvettes, I always took it as "gospel". I've never really focused on C1 Corvettes, at all.

Another interesting point: I can find no indication that the CV-202 ever superceded to the CV-590. The CV-202 superceded to the CV-693. Later, the CV-693 was discontinued without supercession.

[mike mccagh]

Re: '62 PCV valve part number

mike, joe, dipstick: is the 62 PVC valve CV-202 part #'d 1552729 ? thanks, mike

[Joe L.]

Re: '62 PCV valve part number

mike-----

The part number embossed on the CV-202 valve is, indeed, 1552729.

[Dennis C.]

Another question...

...Is the PN the same for this valve on a 60 or 61 carb equipped car? I keep wanting to think it flowed the opposite way and attached back where the road draft tube would normally be.

[Joe L.]

Re: Another question...

Dennis-----

I believe that a 1961 Corvette used valve CV-276.