Blue Devil Head Gasket Sealant (32 oz.) - BLU38386
Blue devil engine and cooling sealant December 6, 2010 1999 gmc jimmy 4.3 eng.Had water running down side of motor and from tailpipe,either bad head gasket or intake manifold gasket,i didnt flush eng.like they say to do, poured in slow ran for an hour in 20 mins.no coolant leaks,thought i'd give it a try before tearing into top of eng.couldn't ...