Seems like the 'simple test' for a clogged radiator is that you remove the
lower hose from the block and sort of rotate hose until it points 'up'. Fill
the radiator with water with the bottom hose blocked. With radiator cap
removed the water in radiator should rush out, almost like it is under
pressure, even spurt up about 8" in height, when you remove the rag you have
stuffed in the end of the lower hose.
If it does not, some of the radiator tubes or fin area is blocked from rust,
hard water scale, or other crud.
Obviously this is not a high tech test, believe it may be in Motors manual or
some Mopar shop manuals. ANd it do not tell exactly where in the radiator
the blockage is but it does tell U it are partly blocked. Now you remove
radiator and take it to shop for the 'real' test and hope it can be salvaged.
L.
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