Folks,

Today the alternator belt on my 240D broke. I drove it six miles without the water pump or fan before I realized what happened. The temperature gauge has been spotty of late (you can bet I'm fixing that post-haste) so I can't say how high the coolant temperature got. I can say that the highest speed I got up to was 55 for half a mile. I ended up putting about 1.5 quarts of fluid back in after I parked it.

I'm replacing the belt tomorrow, and I have high hopes that the engine is not too damaged. With the transmission in neutral I can turn the crankshaft, so at least it didn't seize up.

The question is: how can I check if I damaged the engine? What is liable to break when an engine overheats?

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'Betsy the Getaway Car' : 1978 MB 240D, 582k
'The Mistress of the Sea' : 2001 Giant Boulder, 10.30k