Water… Distilled? Purified? Hose??

Mike69cuda said

I have used tap water my whole life. Engine is full of metal crap anyway. Can’t see that it matters. Just an opinion.

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Depends on your water source .
Well water can be full of disolved minerals and salts that promote electrolysis and solid accumulations.
Some of the eaten out alum manifold, timing covers have severe material loss/crystalization.

https://www.forabodiesonly.com/mopar/attachments/sb_timing_cover_photo2-jpg.1715990010/