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How to correctly do a coolant flush on a car that hasn’t been running in 20 years

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Old Jun 2, 2026 | 11:24 AM
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Jesse86
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How to correctly do a coolant flush on a car that hasn’t been running in 20 years
I have a 1986 rx7 that I’ve been trying to get running again, I’m now on the cooling system and want to flush out the old coolant. Are there any good ways to go about this without the car running yet? Thanks
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Old Jun 2, 2026 | 03:29 PM
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Yep. Drain from the radiator and drain from the block (theres a stud, i think its...14mm?...sticking out above the oil drain plug where the engine mount bolts are)

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Old Jun 2, 2026 | 05:19 PM
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Driver side, BTW. What we used to do is not acceptable now. I never recycled the fluids. just drained into the driveway.

Drain and fill your system until it's clean.
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