Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
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runs hot

Old 10-28-2009, 10:09 PM
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got a 1990 cherokee that runs hot quick i took the therm.out, flushed it out, done a compression test and no water in my oil. about 5 to 10 min. after idleing it starts going back into my ress. with a stream as big as the hole. was wondering what yall thoughts r bot it. thanks in advance.
p.s. it starts bubbling out the ress.
Old 10-29-2009, 12:24 AM
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head can be not good is there knock in the vale cover
Old 10-29-2009, 01:30 AM
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radiator clogged?
Old 10-29-2009, 01:49 AM
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did you do a fluid change
Old 10-29-2009, 05:41 AM
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1990 isnt that renix with the closed pressure system? Did you burp it well after taking the t-stat out etc?
Old 10-29-2009, 05:49 AM
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it can be water pump
Old 10-29-2009, 12:45 PM
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Mine ran hot because my coolant bottle was leaking.Fix it and now it dont get hot anymore.
Old 10-29-2009, 12:50 PM
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check the pump remove and inspect it ,,mine run hot and the blades on the impellar were gone I guess they just rusted away ,,new pump from the zone and prob. was solved its abt a 2 hour job...
Old 10-29-2009, 12:52 PM
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Aint there like a weeping hole on the water pump that when it starts to go bad it will leak?
Old 10-29-2009, 01:15 PM
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jeep85
is this the knock your talking about?
Mine does this and gets hot like 220-230 after 15min of driving
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