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deerhunter

Oil change...... and flush???

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Simplicity314
The old timers would use that or diesel to flush crankcases, but that was before detergent oil. Sludge would build up in the crankcase and needed to be flushed. You don't need to flush the crankcase with anything--almost all oil has detergents nowadays. Just make sure you get it warm before you change it.

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lndscpr
my friend Eddie would use gasoline. Remove the sparkplug, drain the oil. Put in some gas and turn the flywheel.I heard it is dangerous. But he could get the oil as clean as could be in an old engine.

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ikipp
Reminds me of a conversation I had with my dad. Way back when, in the days of the old ford model A. Dad used coca-cola to flush out the car radiator. Left coke in it overnight and he swore that when they flushed it out in the morning that the radiators were very, very clean. Not a old wives tale, its true. In the engines they used kersoene as a cleaning solvent.

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ZippoVarga
I mentioned this once before and thought it worth mentioning again. Rislone. 6oz in the larger 10+ hp motors. Top off with your choice of oil. I've used Rislone since the 80's and swear by it's ability to prolong oil life and keep things clean. I've also used Coca-Cola for cleaning. The theory is that the Phosphoric acid in the Coke will act as an emulsifier to grease and sludge. Although.......I wouldnt suggest using it on any internal parts of ANY engine just because it's also got sugar in it. Muratic Acid was always my choice to clean out radiators and heater cores. 1qt acid, top the radiator off, run the engine for about 20 minutes or how ever long it takes to open the thermostat then thoroughly flush the system for another 30 minutes with the engine running at normal operating temp. Making sure you totally drain the engine block as well as radiator by way of the heater core hoses. Dang....I can get long winded about these things some times. Sorry!! Hope my 2 cents worth helps.

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BLT
Just remember this, what ever is flushed loose is liable to be picked up and splashed out some where. Better off draining oil at regular intervals and let the stuff come out the drain port. Engine oil is still a cheap commodity.

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