Re: IML: colling system pressure?

["Dennis" <Barracuda360@xxxxxxxxxxxxxxx>]

Take the thrmostat out and stick the hose in there.  take the bottom hose 
off the engine, turn the water on till it runs clear.  Do the same thing, 
backflush your heater core, but keep the water pressure turned down on that.

Dennis
68 Omaha Orange FB 360
67 Imperial Titanic 4 door sedan
64 Dodge 880 land yacht w 413

----- Original Message ----- 
From: <therichardsonfamily@xxxxxxxxxxx>
To: "IML" <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Tuesday, February 20, 2007 12:35 PM
Subject: IML: colling system pressure?


> 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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