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Join Date: Sep 2006
Location: The Bluegrass State
QJet Experts: Need pictures or help with idle vent valve
I am almost done rebuilding the original Quadrajet for my L35 396 car, and I am confused about the fuel bowl vent assembly. This carb has a little rubber flapper that is attached to a small metal strip. There is also another metal piece that hooks into a small metal rod that wraps around the accelerator pump lever. Fromm what I have read, the rod is supposed to be actuated by the pump lever to open it in the idle position and allow it to close otherwise. To add to the confusion, I read that some models have a thermostatic bi-metal strip that is supposed to open the valve at temperatures above 75*, and the rod is supposed to close the valve for off-idle operation.
I'm pretty sure the small metal strip that the rubber seal is attached to is the aforementioned bi-metal strip. I think I understand how it is supposed to be installed, but I am not sure about adjustment and operation of the other metal lever and actuating rod that attaches to the accelerator pump lever. Can anyone shed some light on this? Some pictures of the vent correctly installed on a Q-jet would be very helpful. This part is usually under a small square metal "doghouse" on top of the carb's fuel bowl.
I'll try to get some pictures of my carb and the parts in question later today when I get home from work.
Thanks for any help!
1967 RS/SS 350 Conv - triple black, 4sp, tach & gauges
1969 VN-built RS/SS 396 Conv - Garnet Red/Black, 4-sp, tach & gauges