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58Bonne's 1958 Bonneville

2019 June
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StylinMontana

Coolent flush

Question

How to on 00' montana with 3.4l. I can do it, but whats best way? I would pull drain plug in rad, stick in hose, turn on hose, run engine until fluid out of drain in rad it clear.

thanks :agreed:

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All I do is take the lower rad hose off and let the engine drain for a bit. Then take the upper hose off and run water through it via my garden hose to push most of the remains out of the engine. Re-attach both hoses and fill.

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I just wanted to add that pulling the lower rad hose is the preferred method.

Some people have had the radiator drain plug leak after it is removed and re-installed later.

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