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Old Oct 2, 2012 | 01:08 AM
  #1  
90CherokeeLaredo's Avatar
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From: Central California
Year: 1990
Model: Cherokee
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I took this video right after I drove about thirty miles.


Click the picture

Turn up the sound... I think the reservoir may be overheating and the coolant boils over and comes out from the lid. Should I be worried about this or am I just worrying about nothing?
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Old Oct 2, 2012 | 01:09 AM
  #2  
NorCalJeep's Avatar
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From: Santa Rosa, California
Year: 1987 Comanche,1990
Model: Cherokee
Engine: 4.0L Renix
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What is your temp usually at? You will definitely need to get a new overflow bottle.
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Old Oct 2, 2012 | 07:29 AM
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From: Williamsport, Pa
Year: 1997
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First of all, I'm not getting the video, just a picture. Second, it's quite possible that you have a blown head gasket. Exhaust gasses escaping into a coolant passage will cause pressure to build in the system. This is commonly noticed when the engine is cold and you start it and after a minute you shut it off and then open the coolant resivor. If you hear air pressure release then it's time to take it to a shop and have it checked.
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Old Oct 2, 2012 | 07:56 AM
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Year: 2001
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^^^Eh, I dont think its necessarily indicative of a blown head, its a renix era..they are known for finicky cooling systems. Anyways..I had the same issue with my 88..took a few different steps and never had the problem again, I went ahead and swapped in a new t-stat, replaced upper and lower rad hoses, did a complete flush, and then..replaced the entire reservoir and it solved my problem, I had a small (I mean damn small) crack in the reservoir that was causing the pressure to escape.
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Old Oct 2, 2012 | 08:47 AM
  #5  
cruiser54's Avatar
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From: Prescott, Az
Year: 1990
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First off, replace that chinese crap-cap with one from Napa. 703-1396.
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Old Oct 2, 2012 | 11:18 AM
  #6  
90CherokeeLaredo's Avatar
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From: Central California
Year: 1990
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Originally Posted by Cherockee
First of all, I'm not getting the video, just a picture. Second, it's quite possible that you have a blown head gasket. Exhaust gasses escaping into a coolant passage will cause pressure to build in the system. This is commonly noticed when the engine is cold and you start it and after a minute you shut it off and then open the coolant resivor. If you hear air pressure release then it's time to take it to a shop and have it checked.
Click the picture, it will take you to the video on Photobucket.
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