There is this whining noise coming from the interior heater fan, when I turn on the heater. Its on the passenger side and it sounds like a cat being killed slowly. I think I'm gonna have to get behind the glove compartment box and take a closer look.
Any tips as to what this might be or how to handle it?
Thanks.
Matt
If it's the same as the '87, it's the same fan motor as a Chevy Celebrity uses, I think they may have updated the heater box design by that year though in which case I don't really know. In the older cars you get to the fan from underneath the dash, it's covered by the same cover to the right of the passenger's feet as the ECU is behind.
Thanks Chris,
That was helpful. Where did you get the replacement and what does it cost and what is it called exactly?
Thanks again,
Matt
compartment
BTW,
Can't I just WD40 the motor?
WD40 is not a long term lubricant. If you could get a drop of oil on the bearings, that may help, or it may only extend the life of the motor a couple of days. However, it's hard to get that drop of oil where it will do any good, especially on the fan end. To much oil will foul the brushes.
Also the motor is pretty cheap, I got mine for under $20 brand new, not worth mucking around with the old one.
Hi Matt: Water comes in through the air vent/cowl and sometimes gets trapped at the base of the motor, which eventually rusts the motor shafts and causes the howling, or ruins the motor. There is a rubber heater tube that is designed to dry the motor, but this doesn't always work. I documented the procedure on a 1985 740 I owned, along with some possible aftermarket sources.
-- Cameron Price Newington, Ontario, Canada
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