Small conical-coil spring under knob late 70's early 80's Delco Stereo

[79 Eldorado]

One more question. I've seen these before but I don't recall which knob it fell from and the order of assembly.

When I was taking the knobs off on the 1979 Eldorado I thought something fell but I didn't see what it was. As I was working under the dash I saw the spring and immediately realized it was under one of the knobs. I think I was removing the left knob when it fell but because I never saw anything I didn't really note which side or at what stage of the removal it fell.

Funny too because the left knob does have a press function but it also works without the spring there.

Thank you,
Scott

[Eric DeVirgilis CLC# 8621]

The spring helps prevent the inner knob from changing positions when the outer knob is turned. They're usually installed on the radio control shafts on either side.

[79 Eldorado]

Eric,
Thanks for the explanation it's good to know the reasoning behind them. I only had one but I can tell the dash has been removed before. I guess I'll just put it on the driver side shaft and keep my eyes open for one for the passenger side.

While I was working on the Eldorado I had spares of almost all of the fasteners from years of working on my '79 Toronado but no extra springs. The knobs are easy enough to remove if I come across a spring in the future.

Thanks again,
Scott

[79 Eldorado]

Looks like I need to measure the spring I have because a place like this may have replacements:
https://www.thespringstore.com/stock-small-conical-springs-for-sale.html

[79 Eldorado]

In case anyone wants to see a photo I took a couple with dimensions and a 7mm screw for reference.

Wire diameter was ~0.63mm