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2007, Part 1a: 5.7L V8 Engine Sludge and Gasket Change
To lay the groundwork, John stated: "I'm the original owner and did all cooling maintenance myself. I flushed and replaced the DEX-COOL twice since new (about 3 year intervals). I mixed 50/50 with distilled water and never added any other product except Bars Leaks factory sealer (gold powder). The orange sludge is about 1/4 inch thick."
believes the sludge above came either from the DEX-COOL itself or from
other components that were broken down by the antifreeze. He's convinced
that this sludge interfered with the cooling of the cylinder heads, causing excessive heat and leading to detonation. The detonation problems occurred mostly in hot weather.
Truly concerned about the future of his "Burb," and wanting it fixed right, John had called me last summer looking for a true expert to guide him through a quality repair. I pointed out several DEX experienced shops who I knew would lead him correctly. John chose to work with Bruce Balfour, owner of Mac's Radiator and Air Conditioning (562-920-1871), Bellflower, California. Bruce provided the Fel-Pro gaskets.
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