I drained my coolant and when I was refilling it, I noticed what almost looks like a rotting rubber ball floating around in there. What the deuce is that? Is it normal? Should I remove it asap??

Thanks,
Chris

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'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09