Question about 2002 Volkswagen Passat
Oil in the coolant is a bad sign. it means the head gasket could be in need of replacement, or the head is warped/damaged. pull the oil dipstick out and see if the oil looks milky, or tan like chocolate milk. if so, dont buy unless the seller fixes it
Posted on Nov 07, 2010
You could use a product called water glass or Sodium silicate that you can find at some pharmacy stores. Sodium silicate can be used to seal leaks at the head gasket. A common use is when an alloy cylinder head engine is left sitting for extended periods or the coolant is not changed at proper intervals, electrolysis can "eat out" sections of the head causing the gasket to fail. Rather than remove the cylinder head, "liquid glass" is poured into the radiator and allowed to circulate. The waterglass is injected via the radiator water into the hotspot at the engine. This technique works because at 210-220 °F the sodium silicate loses water molecules to form a very powerful sealant that will not re-melt below 1500 °F.
Posted on Nov 07, 2010
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