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Weak-seeming starter

BILLDENNES

200,000 BMW miles so far
Problem fixed! Here's how

I checked all of the battery connections and found one that would tighten about a quarter-turn.

Now the symptom is limited to slow starter speed for the first half-second, sometimes. Always works on the second try.

:+)
 
Bill - you may want to have the dealer do a battery load test.

I had a poor starting condition and all my connections were tight.

When they did a load test the battery was at 55% capacity and this was after it was on the BMW Charger over night and a 1 hour drive at highway speeds to the dealer.

The battery was covered under warranty.
 
The resistance of copper in the motor increases 20% for every 100 F, so the motor is not as powerful when it is hot. The battery usually makes up for that. Sounds like a weak battery/bad connection, then when the Hot starter motor needs a bit more voltage, the battery can not supply it.

Rod
 
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