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92 miata 1.6 engine coolant drain plug

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Old March 21st 17, 07:49 PM posted to rec.autos.makers.mazda.miata
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Default 92 miata 1.6 engine coolant drain plug

So, really old thread, but over the years I've learned a few things about my '91 - take with a grain of salt because I have a water cooled turbocharger hanging on the side of the engine.

When I drain my '91, I get almost 6 quarts out the radiator drain plug, as far as I can tell, if you don't tilt up the front of the car too much, the heater core, block, and everything else seems to mostly drain out the radiator drain plug. I'm sure there's some residual in there, but not great quantities.

The fun part comes when you fill it - only about 3-3.5 quarts goes back in. I start the engine and let it idle for ~5 minutes, then, when the thermostat opens, there's a giant sucking sound as the rest of the system fills up - I stand at the ready with additional fluids to put back the remaining 2.5-3 quarts when this happens.

I also have a stock '99 1.8 that doesn't seem to work this way, it more or less fills up first try.


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