496 mag coolant change
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Thanks for the help here Ray. I was able to find the SB side plug and drained out a little over 3 gallons. The port side is buried under tubes and wires and so I wasn't able to drain that side. 2003 engine 800 hours with original coolant and it looked really good yet and was good on the freeze test strip. I figured I was able to replace more than 60% of the coolant so maybe I'm good for a while.