cooling help

Hello ,
I have a 70 challenger rt ,383 ,4 speed , 70k orig miles ,all orig .Heater delete car .
redone motor ,stock manifolds etc , block flushed , orig radiator redone , new water pump , tried 180 thermostat , tried without ,orig clutch fan etc. no money spared .
it wants to run on the way hotter side of the gauge ?
should i consider a new alum , 4 row radiator or ? Been fighting it for a while .
any help is awesome ?
thanks hp

h paul said:

Hello ,
I have a 70 challenger rt ,383 ,4 speed , 70k orig miles ,all orig .Heater delete car .
redone motor ,stock manifolds etc , block flushed , orig radiator redone , new water pump , tried 180 thermostat , tried without ,orig clutch fan etc. no money spared .
it wants to run on the way hotter side of the gauge ?
should i consider a new alum , 4 row radiator or ? Been fighting it for a while .
any help is awesome ?
thanks hp --

Click to expand...

-- Check the temp, at the neck where the upper hose connects to the block, with a digital thermometer, to be sure that Your gauge is correct. -- Do you have a shroud ? -- Is the crank pulley smaller than the water pump/fan pulley? It should be the same or ideally larger. -- 180 t stat is good. -- a 7 blade Mopar fan works good for Me. - If You decide on a new radiator - pay attention to the tube size. Some larger rads have real small tubes. For example BeCool rads are 2 row with 1" tubes. -- I'm surely not an expert, but these are some of the hurdles that have plagued Me.

As above.... start with checking you actual temps using in infrared temp sensor pointed at the upper hose, t'stat housing, and upper tank. No need fixing everything else if the gauge is inaccurate.

Under what conditions exactly does it run hot? At idle in traffic, or at higher speed cruise in the interstate? This info will help narrow down on where any problem is.