5K blower motor.

[Steve Sherman]

I have been anticipating replacing the blower motor on my 87 5K for a
while.  I've already got a new replacement motor (how's that for
planning ahead).

My  question is how long is my blower motor likely to last once it
starts making a squeaking noise on right turns?  It had been quiet and
working well for 4-5 months now, but just started making noises on right
turns.  The noise goes away after a min or so, or the next left.

If I can safely put off the change until warmer weather (3 months or so)
I'd really like to do that...  However I don't want to get stuck in a
snow storm sometime without a blower.

Any histories out there as to how long a blower has once it starts
making noises like this??

TIA