Corvette C3 Headlights Vacuum Relay Valve (Dogbone)
thingiverse
This is alternative control valve (dogbone) to headlight vacuum relays, when original valve doesn't hold vacuum. You will need print this valve (I use ABS material 100% infill) and then put 2 o-rings (I used 5mm inside diameter and 2mm thickness) to grooves on each side of the valve and change this valve with that inside of vacuum relay. For complete take apart vacuum relays and then put them together use instructions in this link - http://www.corvette-101.com/relays.htm (It was very helpfull for me). If you need some more information, write a comment.
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