Hi there,
These quick fixes at best do a temp sealing job, but if the head is damaged or the gasket the pressures and heat generated internally of the engine will continue to damage components and further failure will result, also these chemical sealants also can clog radiators and cause further problems, my advice is fix it properly and don't relay on chemical fixes.
Mark (mhpautos)
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Wednesday, January 21st, 2009 AT 3:20 AM