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I have had great success oiling the motor bearings. After drilling the access hole in the blower housing I use a 12" long piece of 3/16" copper tube to transfer the oil. I add a few drops on 20 weight oil into the copper tube and use compressed air (about 20 psi) to blow the oil into the bearing while the fan motor is running on #2. This will not over oil the bearings and cause oil film on the windshield.
This method has works well however it must be repeated about every 9 to 12 months depending on blower use.
Keep in mind this is a bandaid to the problem and eventually you WILL need to replace the blower motor. I have done this to prolong the misery of the dreaded blower motor change out on one of my 240's for the past 3 years.
Speaking from experiance (I have changed two blower motors) allow three evenings and a couple of adult beverages to install the blower motor and resister.
Good Luck,
Mike
Laharview Farm
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1984-244 GL with 256K (the first Brick), 1984-244 GL with 270K (parts), 1985-244 DL with 290K, 1989-244 DL with 120K, 67 Mustang (271 HP 289) with 260K and 62 F-250 4x4 (262 - 6 cylinder) with 74K
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