Overheating Stumped...

[Bill M <y1topbanana73@xxxxxxxxx>]

So I'm trying to diagnose the issue that's causing my new 4-core
radiator to make the car run hotter than with my previous 3-core
radiator. Not only does it run hotter at cruising, but it starts
getting hot IMMEDIATELY upon stopping at a light to the point of being
scary.

Basically the only thing I changed id the radiator. Car is 318 Poly
with a mild cam, 7 blade fan, fan clutch (confirmed working), no
shroud (never had one), now new 180 deg high-flow t-stat, spring in
lower hose.

The symptom I cant figure out now is...after testing things today and
keeping an eye on temps w/ a laser thermometer, I turned it off to let
it cool and scratch my head. When the rad, and upper hose had cooled
to ~165, the lower rad hose was dead cold. I pulled it off and there
is no restriction in the hose or the pump. I looked in the water pump
from below and don't see anything up there either. It's not leaking

Any thoughts??

Bill M
65 Coronet 500 'vert http://1962to1965mopar.ornocar.com/mmo62008.html
73 Dart Sport, 00 Cherokee Sport, 05 Ram 2500 CTD, 4WD, QC, LB, Laramie
21 Model T Depot Hack, 92 Accord, 06 Mazda 3

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