strange grinding noise from engine. cracked radiator!?

my radiator is cracked a little bit on top on the plastic part. when it is in drive, coolant flows out. and there is a grinding/ slight popping sound when it idles or when i start to press the gas.my car is just sitting on my driveway for now. is it from the water pump? or something else. please help!

2011-11-09T18:44:12Z

my engine does not overheat though

Stpaulguy2011-11-09T16:18:49Z

Favorite Answer

If the radiator is cracked, it can't build pressure. No pressure means lower boiling point of the coolant. I bet you're hearing coolant boiling at idle.

You're heading right into a major repair bill if you don't get it fixed NOW. One overheat and you can warp the cylinder heads. That'll cost you $1,000 PLUS the cost of the radiator.

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bandit_602011-11-09T19:12:22Z

maybe the fan is hitting the radiator shroud.

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Anonymous2011-11-09T16:00:39Z

could be pistons

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