Radiator Problems...Please Help

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  #1  
Old 09-12-05, 11:38 AM
hobbydude
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Exclamation Radiator Problems...Please Help

Itstarted aboout three months ago. I replaced the water pump. The radiator is a year old. Now yesterday I had to replace the lower hose and it is still overheating. what is going on? I've kinda hit a wall here
 
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  #2  
Old 09-12-05, 02:22 PM
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Make/Model/Year/Engine?
It started overheating 3 months ago?
You put in a new water pump to fix the over-heating problem?
You replaced a lower heater hose to try and solve the problem?
When does it over heat?
At Idle? Highwy? Both? all the time? Sometimes?

Was the system flushed with the new rad.?
...or water pump?
...new thermostat with either?

How do you know it's overheating?
 
  #3  
Old 09-12-05, 03:58 PM
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I'd check the thermostat first.
 
  #4  
Old 09-12-05, 10:27 PM
hobbydude
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It is an 87' Jeep Garnd Wagoneer. It has a 4.0 liter striaght 6. I relpaced the water pump because the old died. At that time I also replaced the thermostat. I put a heavy duty one in b/c that was all Pep Boys had. I replaced the lower hose b/c it had a hole in it. I did get a flush after the water pump was raplced. I did the pump myself, but took it to a shop for the flush. Does this help at all? Thanks for any info. It over heats always
 

Last edited by hobbydude; 09-12-05 at 10:27 PM. Reason: p.s.
  #5  
Old 09-13-05, 05:05 AM
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Originally Posted by marksr
I'd check the thermostat first.
If I remember right, on the 4.0 it's pretty easy to get to
I'm not one for throwing parts at a problem w/o confirming they are bad, but I think I'd just replace it
They are not expensive
Could be backwards, the wrong one, or defective

Also check the hoses on the pump, make sure they are not switched
 
  #6  
Old 09-13-05, 03:12 PM
BuzzCut
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Did you put the spring back in the lower radiator hose. Sounds like it is collapsing.


Originally Posted by hobbydude
Itstarted aboout three months ago. I replaced the water pump. The radiator is a year old. Now yesterday I had to replace the lower hose and it is still overheating. what is going on? I've kinda hit a wall here
 
  #7  
Old 09-13-05, 08:14 PM
DNT1
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the Jeep 4.0s seem to need a real good fan clutch I chased a problem for a while on one before finally putting a fan clutch on it and curing the problem, also some of the 4.0 engines did in fact use a reverse rotation water pump you may want to double check that you did in fact install the correct pump.
 
  #8  
Old 09-16-05, 09:14 PM
hobbydude
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Well, it stopped. I put coolant in it every hour, so I guess it was just dry from when the hose blew. Thanks for all the advice guys. I really appreciate it.
 
  #9  
Old 09-16-05, 10:22 PM
jpotts461
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Closed systems require time to evacuate all air. There is an air bleader valve. They are not fill and go. Keep adding anti freeze and it will blead itself over time if it does not over heat.
 
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