Question about 1998 Dodge Ram 2500 2WD

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2000Dodge ram Should the lower radiator hose be warm when the heat is on

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Both upper and lower should be warm when engine is warmed up and thermostat is working properly

Posted on Dec 27, 2008

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Posted on Jan 02, 2017

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I have a 2004 Dodge ram 1500 5.7. Luke warm heat


are you talking about your heater core for heat in the truck ? is there a valve in the heater hose that you have to open to get the hoses hot to the core this is under the hood , follow the hoses , could be clogged core , does it over heat , or get up to temp should be about 190 normal temp for most motors why did you change these parts anyhow , did you use the radiator fix bars leak stuff that you put in , bars leak , if so you may have clogged your core , take the hoses off the core and blow it out ,pain in the but you went this far , ck for that valve to open

Mar 07, 2015 | 2004 Dodge Ram 1500

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Heaters running cold at 90 degrees


If the engine is running at a normal temperature I would suspect the thermostat.
Normally from a cold start the coolant should only circulate through the bypass hose, the heater matrix, and back through the engine, As the engine warms up and the thermostat begins to open the coolant is directed through the main radiator - at this point you will be able to feel the upper and lower radiator hoses warming up.
If the thermostat is faulty and permanently open you will be able to feel the upper and lower radiator hoses warming up very soon after starting the engine and at the same time as you feel the heater hoses begin to warm. This causes most of the heat to be radiated away and so the heater will never warm up.
Unfortunately the thermostat is hidden underneath the water pump on a passat and requires the cooling system to be drained before it can be changed. It may also require the power steering pump to be removed to get access to the thermostat cover.

Feb 01, 2014 | 2001 Volkswagen Passat

1 Answer

2002 dodge ram no heat


Do you live in an extremely cold region? If so, those folks usually have a problem with heater in winter time. With a fully warmed up engine, how hot does it get in degrees F? Are the heater hoses hot?

Mar 12, 2017 | 2002 Dodge Ram Pickup 1500

1 Answer

Over heating


AGE & MILEAGE...SERVICE HISTORY? COULD BE A THERMOSTAT (FEEL TOP RAD HOSE COMPARED TO LOWER HOSE FOR EQUAL TEMPS...IF LOWER IS COOLER (AFTER 15 MINS OF WARM UP)...THERMOSTAT IS STUCK!
ALSO COULD BE PLUGGED RADIATOR, HEATER CORE...ETC.....

Mar 10, 2013 | 2000 Saturn SL

1 Answer

2005 Chevy Impala...all I did was change the lower radiator hose because it was leaking. Now the car overheats, the upper hose is hot and the lower hose is warm. Does this model have vapor lock issues or...


the lower radiator hose is a return hose and there are no vapor lock issues. If your coolant level is full when you start your vehicle and when it heats up and the system pressurizes your coolant expands with heat and then that excess pressure will go through the overflow outlet to the reservoir and the reservoir has a relief opening near the top to relieve pressure or for excess fluid to come out. If the lower hose is just warm then your water pump may not be circulating properly (be sure to check belt for tension no more than 1/2 inch of play should be present). One messy way to test water pump would be to first drain coolant if it is good to reuse it, then remove the lower hose, open the radiator cap and put a water hose in it and turn on half way. Look at the volume of water coming out and have someone start the vehicle and idle at about 2000 rpm if that volume has not doubled your pump is bad

Apr 28, 2011 | 2005 Chevrolet Impala

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2000 Dodge Ram Heat not hot, only luke warm @ idle only 105 deg. @ 1500 rpm. So far this is what i've done and tried: Changed Thermostat with 192 deg oem repl. Changed radiator cap unhooked both heater...


did you use pure antifreeze if so remove it all and add a 50/50 mixture because antifreeze will not heat up good if its pure. needs water to allow good heat.

Jan 05, 2010 | 2000 Dodge Ram 1500 Truck

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2002 dodge 1500 Changed radiator, thermostat, and hoses. No heat


Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.

Nov 19, 2009 | 2004 Dodge Ram 1500

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No fluid in top radiator hose heat dont stay warm..


try sqeezing the radiator hoses several times, upper and lower and fill coolant if it goes down. this should get the air bubbles out.

Nov 26, 2008 | 1992 Ford Aerostar Extended

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