Mechanic Left Coolant Reservoir Empty -
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Go Back > Models > Jeep Wrangler Forums > JK Wrangler Technical Forum > Mechanic Left Coolant Reservoir Empty

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Unread 10-26-2014, 04:52 PM   #1
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Mechanic Left Coolant Reservoir Empty

About 4 days ago, I took my '13 JKU to the dealership's service department to have a window motor replaced, my oil changed, and the recent transmission line recall work completed. The next two days, I noticed that it was slightly harder to accelerate like the engine was ever so slightly bogged down, and that it decelerated faster then it used to when allowed to coast at around 30 mph. That night I decided to check my fluids just in case they were not filled correctly at the mechanic and, sure enough, my engine coolant was bone dry. I filled the reservoir up but the JKU still seems to feel (albeit minimally) different. It's not very noticeable but it is definitely different. I did not notice the engine overheating at all but I do not know what else it could have affected. Could someone tell me the smart way to approach this situation with the service center by making sure that they fix anything that could be wrong with it?

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Unread 10-26-2014, 05:18 PM   #2
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With the engine cool did you remove the radiator cap and check the level? Is the overflow reservoir low or completely dry? Did the tech do any work which would involve draining the overflow reservoir?
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Unread 10-26-2014, 06:31 PM   #3
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2014 JK Wrangler 
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Location: Bloomsburg, Pa
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To my knowledge the work you had done doesn't involve the cooling system in any way!But they may have disconnected the battery for a while and the systems have to relearn your habits.Or maybe they reflashed your system?
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Unread 10-26-2014, 07:18 PM   #4
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Based on the OP's info, there's no reason for the Coolant reservoir to be "EMPTY" and---

It looks like the only thing the service mechanic is guilty of is not even noticing the lack-O-Fluid in that highly visable reservoir and it has nothing to do with the Auto tranny fluid line work --

Unless he removed it to get to the tranny fluid lines/fender liner, on the drivers side--

Maybe he dumped it and was gonna fill with new/improved MOPAR Fluid---and forgot-

This would warrant a return visit to the dealer and 24 question time !

Good luck

Yellow Jeep No. 683
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Unread 10-26-2014, 07:32 PM   #5
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I do know that when cold the fluid is generally at MIN line or below, which is very far down the overflow bottle. It then expand to near MAX when hot. If your system was low you likely would hear lots of gurgling from air pockets and if really low, your temp gauge would go way up. Also, make sure you put the correct special coolant in your system or you'll brick your heater core over time.

Maybe your gas pedal needs recalibrated?
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