start-up noise

[Chicobiker]

2003 OBS 5spd
190,000kms

Lately, on a cold start, it makes a noise after the actual start of
the engine that I can best compare to a chattering squirrel. It
almost seems like the starter motor doesn't stop after the car starts
and I let go of the key.

What could this mean?

Nothing else seems wrong. Doesn't happen if the car is warm.

 

[Carl 1 Lucky Texan]

2003 OBS 5spd
190,000kms

Lately, on a cold start, it makes a noise after the actual start of
the engine that I can best compare to a chattering squirrel. It
almost seems like the starter motor doesn't stop after the car starts
and I let go of the key.

What could this mean?

Nothing else seems wrong. Doesn't happen if the car is warm.

I would put heat shields on the list.