Any idea how that idle vent valve is supposed to work in 64 Rochester 4GC? There is nothing in 64 Shop Manual and nothing in 64 Delco Rochester 4GC Bulletin. I assume open when idle and closed when gas pedal is pressed ?

Views: 195

Reply to This

Replies to This Discussion

I kindly ask anyone who has original Rochester in his 64 to check if there is that idle vent valve in carb. Small plate in my carb says 7024031 so it is original 64. Thank you in advance.

I have what appears to be the same 4GC in my 62 deville, but I don't know what it does nor does the repair manual really give much insight.  

Thanks Luke

but I did not catch if your carb has that idle vent valve which I am pointing in photo.

I would like to find out if that was in 64 original Rochester carb of not.

It does indeed.  Vent valve and that actuating tang.  The manual says 

-position fast idle cam so that fast idle screw is on the highest step of cam

-vent valve actuating tang on pump lever should be contacting vent valve so that the rubber disc is just off it's seat

-to adjust, bend actuating tang

Thanks Luke. Do you mean 62 factory service manual?

Yes, for 62, it is a a different OEM number for 64 but I have gone and looked at 64-66 4GC's but I don't think there is much between them.  The remans available online for 7024031 have the tang and idle vent valve, and the purpose and setup is surely the same.

I was watching this thread because I wanted to know what it did too!   

RSS

Photos

  • Add Photos
  • View All

Forum

Current 1963/64 Cadillac Listings on eBay

Started by Jason Edge in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge 9 hours ago. 0 Replies

To see all 1963/64 Cadillacs Listed on eBay in the USA…Continue

Tags: ebay

Pertronix 3 install and resistor wire

Started by Dave Fehrle in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge 10 hours ago. 15 Replies

A few questions on the resistor wire, what color is it in the pic? The yellow/blue or black? And connecting to the ACC on the fuse box seems easiest way to go with the new switched wire, but where…Continue

Cruise control

Started by CHRIS CARLSON in 1963/64 Cadillac Specific Discussion. Last reply by Mike Travers 12 hours ago. 1 Reply

Is anyone using an aftermarket cruise control on there 64 Cadillac? what brand & model did you purchase?Continue

carter carb paper gaskets

Started by tim sparks in General Discussion 13 hours ago. 0 Replies

had my carter carb on my 63 rebuilt when i got it back rebuilder gave me 2 rochester paper gaskets according to the ones jason sells.will those be a problem putting them on my carter? thanks in…Continue

Blog Posts

accumulator dryer

Posted by CHRIS CARLSON on December 6, 2023 at 10:54am 0 Comments

Who rebuilds original AC  accumulator dryers for 1964 Cadillac? I have been on Classic auto air in Tampa FL wait list for over a year ,  There is one on Old air products web site that looks very similar to the original # 21-4214A but states it fits 1962 Gm cars, The one recommended for a 1964 Cadillac is half the length 21-4215A    What  is everyone using ? I would prefer to be as original as possible. Thanks

'63 Eldorado trumpet horn + 2 standard horns restoration

Posted by Les Eastling on November 15, 2023 at 10:34am 1 Comment

My son, unbeknownst to me, had all three of the horns on our 1963 Eldorado completely restored. We had recently added the Eldorado trumpet horn to the two standard horns and the sound was not very good... we had heard good ones so we knew something was not right... but there was not much we could do to get better sound from the 3 horns. 

There is a restoration service called The Horn Works who my son…

Continue

Clock ‘64 DeVille

Posted by Matt Vander Hooven on July 23, 2023 at 7:36pm 2 Comments

Is there still a member in the Detroit area that refurbishes clocks?

Matt VH

Spark Plug Heat Range

Posted by Patrick Westphal on July 7, 2023 at 10:00am 1 Comment

I found a diagram that illustrates the main factor in determining a spark plug heat range that I was trying to describe to you during the chapter get together.

Here it is:

 

The main factor is the length of the ceramic insulator from the middle of the spark plug to the tip (where the spark happens)  

The insulator…

Continue

Videos

  • Add Videos
  • View All

© 2024   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service