I have an '87 Bronco II with a leaking head gasket. It's has 250k on it and I just use it for local running around. It's losing water into the exhaust and compression on 1 cyl is down.
Until I can repair it right, I've looked at the stuff you put in the water that's supposed to seal it up. Does anyone have any experience with it? Does it work and does it cause other problems like plugging up the radiator and heater core?

I've seen 2 types. One you just dump in the water and run it. The other requires draining and completely flushing the system as it reacts with antifreeze.

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