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I'm guessing but OE installs were probably a special socket designed with keys inside it to align with the slots



This is what I was thinking, but was there never a special service tool (or whatever Mopar called their specific tools) that they used at dealerships back in the day? Surely they didn't use Vice-Grip(tm) pliers evry time.



ahhh , why wouldn't they ??

what engine are you looking for this non existent tool for ?



Um, because they are professional mechanics.

Just your standard Small Block LA engine, but the application isn't important really.

You can use a screwdriver and hammer to remove an ignition switch bezel, but we all know there's a correct tool designed for removeing the bezel. I just want to know if there is such a tool for installing and removing heater hose nipples. Maybe it doesn't exist, I dunno...that's why I'm asking.