Did pouring water into the crankcase do any permanent damage?

Dear Car Talk | Sep 01, 2000
Dear Tom and Ray:
She was driving our son to work in the Chevy when it started smoking. Apparently, the radiator was nearly out of fluid. So when she got our son to work, he went in and got her a gallon of water to put in the radiator. She popped the hood and poured in the water ... right into the crankcase! Needless to say, the car needed to be towed to a garage that specializes in classic cars. After I stopped laughing and picked myself up off the floor, I started to wonder just how much damage she actually did. Will the oil just need to be drained, or does pouring a gallon of water into the crankcase ruin some parts as well? I'm dying to know! -- Jim
TOM: Well, here's the story, Jim. If she just poured some water into the crankcase, realized her mistake and then called the tow truck, it's unlikely she did any permanent damage. In that case, the crankcase could simply be drained and refilled with oil. End of story.
RAY: But don't despair yet, Jim! If she poured in the water and then tried to START the car, she undoubtedly wrecked the engine. Water is a lousy lubricant -- at least compared to oil. So if she tried to run the car with a mixture of water and oil in the crankcase, she almost certainly scraped the living bejesus out of the rings and bearings. If that's the case, you can go ahead and have a good laugh, because she'll need an engine.
TOM: But don't get carried away with delirious laughter, Jim. Most likely, the next time she appeals for an increase in child support, it'll be earmarked for Fred's Classic Car Engine Rebuilding.
She was driving our son to work in the Chevy when it started smoking. Apparently, the radiator was nearly out of fluid. So when she got our son to work, he went in and got her a gallon of water to put in the radiator. She popped the hood and poured in the water ... right into the crankcase! Needless to say, the car needed to be towed to a garage that specializes in classic cars. After I stopped laughing and picked myself up off the floor, I started to wonder just how much damage she actually did. Will the oil just need to be drained, or does pouring a gallon of water into the crankcase ruin some parts as well? I'm dying to know! -- Jim
TOM: Well, here's the story, Jim. If she just poured some water into the crankcase, realized her mistake and then called the tow truck, it's unlikely she did any permanent damage. In that case, the crankcase could simply be drained and refilled with oil. End of story.
RAY: But don't despair yet, Jim! If she poured in the water and then tried to START the car, she undoubtedly wrecked the engine. Water is a lousy lubricant -- at least compared to oil. So if she tried to run the car with a mixture of water and oil in the crankcase, she almost certainly scraped the living bejesus out of the rings and bearings. If that's the case, you can go ahead and have a good laugh, because she'll need an engine.
TOM: But don't get carried away with delirious laughter, Jim. Most likely, the next time she appeals for an increase in child support, it'll be earmarked for Fred's Classic Car Engine Rebuilding.
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