Question about 2004 Dodge Ram 1500

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Truck is running hot. Relaced thermasta and still runs the same. Noticed the top hose gets real hot while the bottom one doesnt. Dont get it.

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The cooling water doesn't seem to making it through the radiator. Look for plugged radiator, blocked upper or lower hose, or ineffective water pump. Remove the inlet and outlet hose after draining coolant from the radiator. Hold your hand over the lower hose outlet while someone fills the radiator with cold water. When full, leave the cap off, then remove your hand from the outlet. If the core is unobstructed, the water will rush through it in a few seconds. Check the upper hose inlet--there should be no obstruction. Inspect the interior of each hose looking for collapse or other blockage. If ok, that leaves the water pump--remove it from the engine and check that the impeller turns solidly with the driving pulley. Any looseness there is grounds for replacement. Hope some of this helps!

Posted on Jul 07, 2010


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