Quote:
Originally Posted by Formulabruce
That bad boy is a coarse sheet metal thread and 5/16 as I recall there is a large star washer, but it wasn't for grounding. This part of the ductwork is usually munched bad
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Thanks for your help Bruce. I'll try some different sheet metal type screws today.
As for the star washers I assume they were to bite in and hold the plastic without having to crank down too hard on those screws. Of course almost every used duct you see has the screw notches completely torn out anyway. That whole rail across the front is just too flimsy to take any over-tightening or flexing.
Agree that this section of ductwork is generally in pretty sad shape. Combination of crappy blow mold plastic, piss poor design, passengers' big feet and Stereo Monkey installation shops just undoing the two screws at the dash and reefing on the duct without 1st checking to find the support bracket on top and the two screws attaching it to the right side vent duct. Every issue I've had under my dash seems to have a line straight back to a stereo shop in Encino CA that the original owner paid to install an Audiovox unit in 1982.
I actually found a main air duct in reasonably good shape at Norwalk on Saturday. First used one I have ever seen with both the two screw notches intact and the top section where the bracket goes not cracked or chunked out. Not perfect but very repairable and in way better condition than what came with my car.