-------------- Original message --------------
From: therichardsonfamily@xxxxxxxxxxx
> Here's a question for Dave, but others may have some insight as well.
>
> My '67, 440 cid (Imperial engine) has newly replaced freeze plugs, and a lot of
> casting sand and junk in the cooling system. Prior to doing a closed system
> flushing with "Cascade", I want to get most of the garbage out using a garden
> hose on the lower radiator hose, thereby avoiding the redone radiator.
>
> We all know 15-18 psi is what a radiator cap opens at. However, my garden hose
> may be as high as 25 to 30+ psi. Can the head gaskets, etc. and inside of the
> engine take that kind of pressure? Does anyone know what pressure exists inside
> the block? Or would I be wiser (with this old , tired engine) to just throw an
> old radiator on and do a closed system flush? Any other drawbacks to my open
> system flush?
>
> Thanks for any input.
>
> Dan Richardson
> 300L Family Heirloom
>
>
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