could have a bad starter,not engaging the flywheel,or stripped flywheel
teeth.Or the drive gear engagement plunger/mechanism is sticking in cold
weather,not fully pushing the drive gear into the flywheel.
"teeth grinding" is NOT good.
Sticky plunger would be my first guess too, although a weak battery
could also do it, as cold will affect its capacity, and if it's already
marginal on CCA...
Most mechanical and battery shops will test the battery for free, so
that's an easy way to rule out (or confirm) the battery.
I charged the battery overnight and it did start, and left it running for 20
mins to charge, then turned it off, but it won't re-start, pointing to a
weak battery, which BTW was 4 yrs old, not 2 as I mentioned earlier.
So off to Autozone to get a pro-rated priced one for the 7 yr warranty.
seems to me that if the battery has enough juice to turn the starter
motor,it ought to be strong enough to pull the drive gear into the flywheel
and turn the motor.Generally,if the battery is too weak,it just makes the
solenoid click,not "teeth grinding".You may still have a sticky plunger.
BTW,4 years is about average for a car battery to last,IMO.
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