I think I've mentioned this before, but the Volvo 240 (aka "the Brick") had mediocre bearings in the ventilation fan motor, causing them to eventually start to squeal, especially when cold. (It also had biodegradable wiring insulation, but that's a story for another time.) This annoyance was made infinitely worse by the fact that, according to legend, anyway, the car's assembly process began with a worker suspending the blower from a string at the beginning of the assembly line, with the rest of the car then being assembled around said blower. No one in their right mind ever tried to replace the blower when the bearings went bad, as this required disassembling most of the dashboard and a little of the engine compartment. Instead, various 'Drill N Squirt' techniques were developed to bore a hole or two (or more, when you missed) in the ventilation plenum adjacent to the motor ends, squirt oil of various kinds* onto the motor shaft at the bearings, blot up the excess somehow, and then patch up the hole and reassemble just part of the dash that you had to remove to get that far. This band-aid usually lasted a year or so - sometimes more, sometimes less - and then had to be repeated. More than one 240 was sold just because of the noisy blower fan.
* I probably hold the record for the worst choice of oil. Not wanting to have to repeat the job, I used 80 weight synthetic gear oil, on the assumption that it would stick in the bearings, and by virtue of being full synthetic wouldn't smell sulfurous. Alas, they actually added sulfur to the oil (probably to be mean) and our 240 smelled like the Bowels Of Hell from then until we sold it.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.