Question about 1989 Jeep Cherokee

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Heater hoses getting hot and raditor hose is not

We have put in 2 thermostast-neither of which are opening...the engine is now over heating...

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First check to make sure there is the right amount of coolant in it check the radiator cap what I mean is that it is holding the right pressure if it is 16lbs then it takes 16lbs of pressure for the thermastat to open also put on a glove and while the engine is running and it gets up to temp squeeze the upper radiator hose and if it opens up in your hand that is a sign the water pump is still working check the condition of the drive belt

Posted on Jan 18, 2009

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Change heater core water pump one pipe get hot


try some comma's?
my wild guess, is you are trying to fix a dead cab heater, right?
and if so, can be caused by 5 things wrong. total.
1 engine coolant not hot (180F or more)
2; fan dead.(cab heater fan)
3:or core , coolant path blocked. (seems you)
4; core exterior core blocked with leaves or pin needles. (sucked in)
5: optional core valve , stuck closed. (cable bad, etc)\



one pipe hot , means ,? core pipe 1 is hot, and other is dead cold?
this flow blockage , bingo !

if pipe 1 is 180F and other is 120f this is normal the heater is heating air in the cab and is dropping due to this heat exchange. (normal)
so why not do the 2 year full flush service now. (skipped i bet)
core hoses:
remove the 2 hoses on engine side, never core side (easy damage)
then back flush both hoses. with a garden hose.
if there is a valve there, test it and make sure it's opening... and free flowing.
and that both engine water ports are open too, from heater hose
to engine. (yes, they pack up too)

Dec 07, 2013 | 1998 Toyota Camry

1 Answer

I have a 1991 Ford Ranger 2.9,and I am having a heat problem I did change the thermostat but no heat yet,this is what I found so far. I checked top radiator and its hot,the bottom hose on radiator is cold....


ok in the engine compartment look at the radiator with the engine cold NOT ON" squeeze the hose with your fingers and feel if hose is crunchy or brittle if is possible a block could have happen locations /points at the vacuum heater valve gate on the heater hoses or a clogged up lower heater hose get a water hose and back flush the heater's hoses normal travel of water is from bottom to top so put the water hose to the tophose and flush backward and try to move the heater valve by finger and see if you get flow (mind you with hoses of the radiator DONT CRANK YOUR ENGINE)

Sep 10, 2013 | Ford Cars & Trucks

1 Answer

97 jeep gc only one heater hose is hot ? i get no heat


Yes. Is there a heat valve in the heater hose may not be opening. Next no heat valve disconnect both heater hoses crank engine and see where the water squirts out of engine thats where the inlet side of the heater Hook the garden hose to the other side and blow it out probably full of rust change antifreeze more often

Dec 05, 2011 | 1997 Jeep Grand Cherokee

1 Answer

1997 Camry 4-cyl fan works but heat very weak - coolant level ok


Probability 1) The thermostat is probably stuck open, coolant is not getting hot enough from the engine to provide heat.

Starting from cold, allow the engine to run and warm up. While doing this, feel the upper radiator hose - you should be able to feel the coolant heating up to the point the hose is uncomfortably hot. If it gets that hot, then go to next step.

Probability 2) The heater core flow is restricted, not allowing full flow of coolant into passenger compartment.

There are 2 smaller heater hoses that run to the firewall. Are either of these hoses getting hot? Both sides hot indicate full coolant flow. Both sides cool indicate heater control valve not opening fully.

Mar 01, 2011 | Toyota Camry Cars & Trucks

2 Answers

1992caprice over heating after replacing the thermostate


You either have the thermostat in upside down or you have an air pocket and the system needs to "burp". Sometimes this can be done by warming the engine and letting it cool down.

Feb 01, 2011 | 1992 Chevrolet Caprice

1 Answer

Car is overheating


First make sure the cooling system is full. This might require letting it cool and filling it more than once though the main raditor cap. Then it needs looked over for leaks. If it won;t stay full it'll overheat. The hose from the recovery tank to the raditor connection at the cap is a problem spot and it the raditor can't **** the coolant from the tank back into the raditor the engine will soon get low. If these things are alright then you neeed to watch it heat up, and see what's happening. The engine should worm up and as it does the upper raditor hose will warm and but hot but not right away. The side of the raditor should start to warm up soon after that, Touching the raditor it should warm up evenly from top to bottom if it doesn;t it's clogged. If the hose and engine get hot and the pressure inside the hoses rise but the raditor says cool then the therostate is sticking and needs to be changed. If the whole radidor gets hot till everythings too hot and the fan does'nt come on then you need to test the fan and it's fuses and connections. The cooling fan will be comanded on if you unplug the coolant temperture senser that's pluged into the side of the therosate hoseing as it's where the upper hose connects to the engine. If the fan seems to be coming on and hot air is coming off the back of the fan and it's still getting too hot and you've decided that the whole radidor is getting evenly hot then the engine may have an issue. Exhaust clogged up ( cat canvertor, muffer bent pipes) The check engine light might be on and the reasons it's on need to be examinded.

Dec 05, 2010 | 1999 Dodge Grand Caravan

1 Answer

Where do I find the thermostat on a 96 Honda CRV 2 Litre


thermo is on top hose opens to let cool water in once hot water has activated it so yes it will be on top hose on block

Jun 20, 2009 | 1997 Honda CR-V

1 Answer

2001 Bora Sport with no heat


When all your hoses are hot I want you to check the heater hoses near the fire wall. Are those 2 hoses equally hot? If not you may have a blocked or leaking heater core. Also make sure the flaps are moving to open the vent that allows the hot air passage to open.

Nov 07, 2008 | 2001 Volkswagen Golf

2 Answers

1998 jeep cherokeesport


Follow these steps:

Check coolant level, then start engine until it is warm and the thermostat opens. You will tell when it does when the needle on your temp gauge goes cold when it reaches around 180-200* and then goes back up. Now turn on your heater full blast and go to the engine compartment. You will see a heater valve located on the passenger side, next to the washer reservoir. It is a black thing with 4 heater hoses connected to it. Feel the hoses. When everything is working correctly it should be like this:

Hose going to waterpump will be hot
Hose going to (I think the thermostat housing) will be hot
2 Hoses going to heater core (mounted behind firewall) will be hot

1. If only 1 heater core hose is hot, heater core is clogged--
UNCLOG: remove 2 hoses going to heater core when engine is cool, hook water hose end to one of the sides and flush out gunk from heater core. Reconnect hose and you should be good.

2. If neither hose core hose is hot, heater control valve is bad or vacuum is bad--
Test Vacuum: remove vacuum line from heater control valve, you should feel the vacuum **** on it when pressed to your cheek and the heater control valve actuator should move when you unhook the vacuum line. If you have a good vacuum, it's probable the valve available at autozone part # 5941 for around $21.

To get heat while you wait to replace part, unhook silver arm on heater control valve that is hooked to the plunger. This will give you heat all of the time, but it is controlled by the bottom hot/cold switch on your heater control unit so you won't get hot in the cab. It will just circulate heat through the core.




Oct 25, 2008 | 1998 Jeep Cherokee

1 Answer

The inside of my camry is really hot


The heater works from hot water from the engine. The flow of hot water into the heater is controlled by the climate control computer. If this is not functioning properly it can be heating even if you have switched it off. Fixing the climate control system may be complex. The flow of water is controlled by valves which may be jammed open causing it to heat all the time. These are under the dash so to fix them you will have to dismantle most of the facia. This can be done but you may battle to find all the concealed screws and clips. If you try it take a careful note of where everything fits so you can put it back later.

To disconnect the heater completely you have to locate the rubber hoses that carry the hot water from the engine into passenger compartment. There will be 2 hoses, one carrying the water in and one carrying it back into the engine after it has circulated through the heater. You can stop the flow in 2 ways, as follows:
1 Disconnect both the in and the out hoses from their respective manifolds, buy a piece of rubber hosing the same size from your friendly auto parts store with 2 hose clamps and fit it between the in and out manifolds. This will take your heater out of circuit completely.
2 Put a clamp on the "In" hose (this will be the hose connected to the engine at the front near the water pump). You can do this with a "C" clamp that you can buy at any hardware store. This will stop the water flowing throough the radiator.

Good luck and stay cool.

Oct 10, 2008 | 2000 Toyota Camry

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