Blown Head Gasket

These Toyota four cylinders are nearly indestructible. Nearly. The trick is to have a coolant leak, and let the engine get really reaallly hot.

Then the head gasket will split, allowing exhaust gasses to get into the coolant passages. After that, you'll just need to build a paper-mache volcano around your radiator cap and tow it to your kid's science fair.

https://video.wixstatic.com/video/f235be_1d080909feac4695ba91474429ac311f/1080p/mp4/file.mp4