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Every other spring I flush the coolant in my El Camino. Drain it out, hook up a garden hose, fill it up, and run the engine for a while to make the water pump, pump some water.
The radiator is pretty old. Just standard old Prestone green fluid. I take the old fluid to our local hazardous waster disposal facility along with the paint, brake fluid, motor oil, and florescent light bulbs I accumulate.
I have no real help for a VW system with an oil cooler. The Elky does have a transmission cooler built into the radiator, but it has never leaked. I had to upgrade the two row radiator with a 3 core radiator long long ago when I discovered the factory 2 row was just not adequate on hot days.
There are adapters that go from a garden hose to the radiator fill cap to flush it all.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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