Coolant being forced out of coolant bottle - JeepForum.com
 
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post #1 of 6 Old 02-09-2019, 06:00 PM Thread Starter
Aussiegolf89
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I have a 2012 unlimited with around 105000 miles that has had over heating issues accompanied by cab heat issues. I have replaced the thermostat and radiator cap and she still gets to 3/4 hot and very little if any heat in the cab. If I keep the fan off for a while and turn it on, I get heat for about 30 seconds and gone. Any advice??

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post #2 of 6 Old 02-09-2019, 06:46 PM
DocAdams1
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Sounds like you may have the casting sand issue.

Normally I would suggest flushing the radiator/ heater core with clean water from both directions until everything flows clean. Then if the problem persists possible the water pump since you have replaced the rest. Unfortunately if it is the casting sand issue beyond replacing everything it would be difficult to clear up.

Try the flush and see if that helps.
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post #3 of 6 Old 11-12-2019, 06:27 PM Thread Starter
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So I took my jeep to the dealership and they have an extended warranty to 150000 on jeeps for a bad head on passenger side. The heads are on back order but at least it will be fixed!
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post #4 of 6 Old 11-14-2019, 11:36 AM
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Quote:
Originally Posted by Aussiegolf89 View Post
So I took my jeep to the dealership and they have an extended warranty to 150000 on jeeps for a bad head on passenger side. The heads are on back order but at least it will be fixed!
Hi Aussiegolf89,
We're happy to hear that your dealer was able to assist. We'd be happy to connect you with a Case Specialist to see if we could possibly get the parts to your dealer faster. Feel free to send us a PM.
Alex
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post #5 of 6 Old 11-14-2019, 02:57 PM
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so its over heating. they want to replace the head? that issue with the head NEVER caused a over heat Not once. That issue would be known by you. It would tick loudly, it will code for miss fires from the left bank #2 and/or 6. its not a dropped seat as well. This issue was/is for leaking exhaust valves. The dealer should only be replacing that head if its coded AND they did a leak down. Is it ticking? like A OLD VW bug?< that is always the first sign of a bad head/ valve issue.

I been through this back in 13, head was replaced. after they did that I did a serious flush of the system. The sand rumor back then. I never found sand i used pressure water running the jeep on infinite amount of water. Until that water was clear enough to drink. The water went into a bucket and then over flowed so any solid would have been seen. Nothing much really. But the rad fluid was contaminated by something. Bad fluid can leave solids that look like sand as well.

So your issues with over heating is the coolant contamination issue I am about sure. I know its not the head causing heating issues. Now there may have been sand in its cast but that is not going to make the valve be misaligned.

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post #6 of 6 Old 11-14-2019, 03:01 PM
Ross
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Your title says "Coolant being forced out of coolant bottle". If the vehicle is running while this happens it can be a head issue. Another issue you may have had was after it sits for a while it is a little harder to start, because coolant will go back in the cylinder. I had a 04 Runner that did this, it was somewhat common for this year 4Runner. I would also loose heat when the coolant got low. Coolant would not flow through the heater core when the coolant levels got low enough.



If it happens after you stop and turn it off it can be the thermostat. I have had a coupe vehicles that did this.

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