coolant reservoir steaming -
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post #1 of 5 Old 04-19-2017, 03:30 PM Thread Starter
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coolant reservoir steaming

Drove the 89 XJ I6 about 6 miles to the shop today, and at the very end of the trip smelled hot coolant, pulled in the drive, and had steam jetting out of the small hose right at the overflow res. connection..... the half or less full overflow was boiling pretty good. I felt the upper radiator hoses, and they were cool enough to hold in bare hand...... I'm hoping the water pump died..... and it's nothing major. Anyone had this happen? I had no issues prior, did see a little liquid drip from bottom when I parked last week, but it stopped in seconds, and i never could locate a leak or identify fluid ( was on grass, and couldn't find the spot, the amount was so small ) I've been told coolant could drip from bottom of water pump on xj's if it's going bad.

Anyway, it's at the shop at least.... any ideas what I'm looking at possibly being the issue? I think water pump, but my kid's making me nervous, he keeps talking about head gaskets..... ( his only auto experience is limited and only import sports cars though )

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post #2 of 5 Old 04-21-2017, 03:15 AM
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A cool upper hose is a concern, that suggests no water is flowing out of the engine. May be water pump or thermostat, possibly a corroded or silted up head..

Steam from the reservoir connection next to the cap is normal, if the water in the radiator is pressurised and above boiling point it will turn to steam upon exiting.

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post #3 of 5 Old 04-26-2017, 09:01 PM
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1989 XJ Cherokee 
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Thats the same thing that just happened on my 89 xj i patched it up with some rtv by the return and it sealed it and stopped for a while until i was running on air and a drop of coolant im replacing the whole radiator overflow tank because there was a little crack in the side where the return lines goes i would check that.
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post #4 of 5 Old 04-28-2017, 08:59 AM
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Fix the hose. Refill with coolant.

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post #5 of 5 Old 04-29-2017, 07:52 AM
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And replacing the radiator cap every couple of years is cheap insurance.

Jeep Grand Cherokee WJ purchased Sept 2014
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