Question about 1988 Jeep Cherokee

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Bottom radiator hose not getting warm

I have a 1988 jeep cherokee and I have changed the thermostat and the bottom hose is still not getting waarm. Like it's not getting any circluation, what can I do to fix the problem. Could it be a water pump?

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Ive seen the impellers corrode on these jeeps and not pump any antifreeze

Posted on Oct 22, 2008

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If my top radiator hose gets hot but not my bottom one does this mean my thermostat is bad


I don't know how did you test your radiator but if you apply below steps you can clarify your problem easier.

If you want to test your radiator:
A) Park your car (it takes more longer to get real temperature values, if the car is moving)
B) Start the engine (don't forget to engage handbrake)
C) Wait around 10 to 15 minute
D) If your top radiator hose gets hot and bottom radiator hose gets warm; your radiator is functional. (In few minutes your radiator fan suppose to work)

If bottom radiator hose is still cold, it means there is a problem at thermostat. If you see any leakage at thermostat housing at the end of above step C, you need to renew thermostat housing gasket too. Even if you buy new thermostat, i suggest you to test it before assembly. If new thermostat doesn't open enough, your car may run so hot.

If you would like to test your thermostat:
A) Boil water in disposable bowl (thermostat may exposure chemical substances)
B) Put thermostat into boiling water.
C) If thermostat opens totaly, it is ready for assembly.

top-radiator-hose-gets-hot-but-not-3h5pkc2unruv115jj1tsixdi-5-0.jpg

Nov 20, 2014 | 2000 Jeep Grand Cherokee

2 Answers

If my top radiator hose gets hot and not my bottom one is that a sign of a bad thermostat


Apollo's answer likely correct but can also be caused by an internally delaminated hose or severely blocked radiator.
Flow diagram attached-

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Nov 20, 2014 | 2000 Jeep Grand Cherokee

1 Answer

98 grand cherokee little heat.heater hoses hot top rad warm bottom is cold collant barely luke warm


While it doesn't seem likely, if you've changed, or had the thermostat changed.... I'd say you got a faulty thermostat. I am curious as to what your temperature gauge says the temperature of the engine and coolant is.. If your gauge is showing hot, I can think of two more possibilities... the water pump isn't pumping right... and, if the water pump isn't working right, the problem can be a cracked head or block, which can cause an airlock in the coolant system. Check the coolant or radiator cap.

Nov 14, 2013 | 1998 Jeep Grand Cherokee

1 Answer

2002 jeep cherokee put new water pump and thermast in still getting hot like water is not flowing cheack top radiator hoses and its hot bottem hose is cold is it a bad radiator what can i do???


Hi David, How long did you run the engine before checking the temperature? The thermostat will only begin to open when the engine has warmed and the gauge begins to move. If after giving it a correct warming period it has still remained cold, I suggest the following. As you have already replaced the water pump, thermostat and radiator cap, the radiator may be blocked. Carry out a back flush, meaning, use a good quality radiator flushing chemical and follow the instructions carefully. Run the engine in accordance with the instructions. Let the engine cool and then draining, flushing the system by connecting a hose pipe with a fairly good head of pressure against the usual direction of flow. If that fails you may need to replace the radiator. Let me know how you get on, Happy new year Regards John

Jan 01, 2013 | 2000 Jeep Grand Cherokee

1 Answer

I put a new water pump on and my jeep and it still runs hot what can i do to stop it from running hot


Change the thermostat. Depending on the models it might just be 10 or less. Should sit on top. Follow the top hose from your radiator to the engine and you will see where the hose stops. Right there is your thermostat. You need to make sure you get one tha thas a gasket. Easy thing to do yourself with minimal tools. Good luck

Mar 12, 2011 | 1988 Jeep Cherokee

2 Answers

How do I install a thermostat on a 1999 jeep grand cherokee v8 4.7 engine


Hello,

To install a thermostat on Your 1999 grand cherokee jeep. You will be needing these instruments, Container, Clamp tool or vise-grip pliers, Thermostat and gasket, 10mm socket or wrench, Razor blade, Flathead screwdriver (if necessary). Then You carefully follow the steps below:
  1. Open drain **** on the radiator to drain the coolant from your Jeep Grand Cherokee. This drain **** is located on the lower right side facing the rear of your Cherokee. Use a seal able container and reuse the coolant if it is relatively new and clean.
  2. Follow the upper radiator hose to the point where it meets the thermostat housing. The thermostat is located inside the housing. Use a clamp tool or vise-grip pliers to loosen the clamp holding the hose to the housing. Work the end of the radiator hose free of the thermostat housing.
  3. Remove two bolts holding on the thermostat housing cover. Pull off the cover. Take note of the position of the old thermostat. Remove and install the new thermostat in exactly the same position.
  4. Scrape off residue of the old thermostat gasket from the inside of the thermostat housing cover using a razor blade. Avoid getting any debris inside the thermostat housing.
  5. Install the new gasket. Reattach the thermostat housing cover and radiator hose. Start your Jeep Cherokee and run the heater on high. Allow the engine to warm up. Check for leaks.
Those are the steps to follow to install your thermostat.
Hope this was helpful. Thank You for using fixya!!!

Jan 12, 2011 | 1999 Jeep Grand Cherokee

1 Answer

I'm trying to locate the thermostat on my 2000 jeep grand cherokee


  1. On 2000 Jeep Grand Cherokee 4.7L V8
  2. Remove lower radiator hose clamp and lower radiator hose at thermostat housing.
  3. Remove thermostat housing mounting bolts, thermostat housing and thermostat.

2000 Jeep Grand Cherokee 4.0l v6
Note:on the In-line 6 4.0L model the thermostat housing is mounted at the top of the engine block next to the water pump.

Nov 14, 2010 | 2000 Jeep Grand Cherokee

1 Answer

Over heating, engine only, just had radiator replaced


Thermostat, is where top radiator hose connects / it could be that it is air locked /also could be water pump after removing the thermostat you should be able to see if water pump is circulating. if it was a used radiator ? it could be just as bad as the one you just changed / Have it flow tested .gallons Pier. minutes. also mack sure no kinks in hose./ let us know .Thank You.

Apr 05, 2010 | 1999 Jeep Grand Cherokee

1 Answer

How do i change thermostadt on jeep cherokee


  1. Follow your upper raidator hose untill you find the themostat housing which is the ending point for the hose.
  2. Remove the two bolts that hold the housing (you may have to loosen the belt to get to one of the bolts).
  3. Remove housing and replace themostat and gasket ( remove any excess gasket that may have been left over ).
THE DETAILED PROCEDURE IS GIVEN BELOW
  1. Open draincock on the radiator to drain the coolant from your Jeep Grand Cherokee. This draincock is located on the lower right side facing the rear of your Cherokee.
  2. Use a sealable container and reuse the coolant if it is relatively new and clean.
  3. Follow the upper radiator hose to the point where it meets the thermostat housing. The thermosat is located inside the housing.
  4. Use a clamp tool or vise-grip pliers to loosen the clamp holding the hose to the housing. Work the end of the radiator hose free of the thermostat housing.
  5. Remove two bolts holding on the thermostat housing cover. Pull off the cover.
  6. Take note of the position of the old thermostat. Remove and install the new thermostat in exactly the same position.
  7. Scrape off residue of the old thermostat gasket from the inside of the thermostat housing cover using a razor blade. Avoid getting any debris inside the thermostat housing.
  8. Install the new gasket. Reattach the thermostat housing cover and radiator hose. Start your Jeep and run the heater on high. Allow the engine to warm up. Check for leaks.

Nov 08, 2009 | 1996 Jeep Grand Cherokee

2 Answers

How do I change the thermostat in a 2000 jeep grand cherokee 2000 Jeep grand Cherokee is over heating when idling. It was recommended to me to change the thermostat but I do not know how and am unable to...


follow top radiator hose from radiator to engine wear hose ends, it will be clamped to whats called the gooseneck, thermostat is under that. you will have to drain coolant, not all, maybe 1 half gal. before you remove it. 2 bolts new gasget new thermostat, just remember spring on new thermostat goes in engine.

Feb 01, 2009 | 2000 Jeep Grand Cherokee

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