Does Flushing Your Car's Engine Actually Work? || Before and After 

Here's a before and after look at what happens inside your car's engine after a 20min flush with transmission fluid!
Transmission fluid is known to have detergents that are good at cleaning sludge and built up debris. When used in an engine, it can provide a cleaning action to the engine's lubrication circuit, which includes the engine head, camshafts, oil galleries and passages, the oil pump, oil filter, oil pan / sump, crankshaft bearings and piston skirts.
In this video, a neglected 1999 Lexus ES300 with 273,000km is subjected to a 20 min flush with just ATF in the crank case. The old oil is drained, a new filter is installed, and a look under the valve cover and oil pan is taken before and after the flush.
Results indicate marginal improvements visually, with the black tarnish remaining on most parts of the engine, though softer to the touch to break apart. The filter picks up some minor speckles of debris, and the transmission fluid changes color from mixing with the remaining old oil in the engine. Overall, on an engine in really rough condition, more drastic results may be noted, but it was not worth the flush on this engine.
Flush your car's engine at home! Transmission fluid can be purchased here:
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New Oil Filters:
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Engine drain pan:
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Engine flush:
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This is the Camera I use:
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