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Help! Coolant bottle empty again!

Linda z.

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I added about a pint of coolant to the black coolant container this morning. Drove about 40 miles. Just checked it its almost empty. No leaks anywhere. Checked underneath. What is happening?
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Linda z.

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Best guess without knowing more details: Head gasket
If the gasket were blown, wouldn't there be signs? Getting good mileage, no white exhaust fumes, no warning lights
 

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hawkeye816

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Couldn't this also be a case of a leaking oil filter assembly?
 

BDinTX

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What engine do you have?
 

Johnny B

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Lots of good ideas. You could pressure test the coolant system to see if it leaks down (that can be time consuming, but will show you if there is a leak in the coolant system). How about any filmy buildup in the tailpipe before running your jeep (oily feeling)? When you first start the jeep, is there a thicker than normal smoke emitting from the tailpipe? I hope this is an easy fix for you. Cause tis the season you should be out enjoying your jeep.
 

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Linda z.

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Lots of good ideas. You could pressure test the coolant system to see if it leaks down (that can be time consuming, but will show you if there is a leak in the coolant system). How about any filmy buildup in the tailpipe before running your jeep (oily feeling)? When you first start the jeep, is there a thicker than normal smoke emitting from the tailpipe? I hope this is an easy fix for you. Cause tis the season you should be out enjoying your jeep.
I've only had it for 2 weeks. 43,000 miles. I love it but now I'm freaking our.
 

tk1700

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The power train, which includes the engine, is covered by a 5 year 60k mile warranty. Find a good (if thats possible) Jeep dealer and have them check it out. Pull the dipstick and check to see if the oil is milky. That would indicate coolant is mixing in the oil. Hang in there and it can be fixed. You have a great vehicle that is a lot of fun.
 
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Linda z.

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The power train, which includes the engine, is covered by a 5 year 60k mile warranty. Find a good (if thats possible) Jeep dealer and have them check it out. Pull the dipstick and check to see if the oil is milky. That would indicate coolant is mixing in the oil. Hang in there and it can be fixed. You have a great vehicle that is a lot of fun.
Thank you.
 

Craigger

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If you're losing coolant, it's either getting pushed to another part of the engine (head gasket or cracked block) or it's leaking out of the engine to the outside. Not many places it can go.

Check the oil and check the coolant. How do they look? Any signs of coolant in the oil and vice versa? Post pictures here. You said no leaks but are you sure? Have you crawled underneath and looked for any drips or evaporated white spots in the engine compartment? It is possible that the leak is slow enough and near a hot part of the engine that the coolant gets evaporated before it can accumulate under the engine.

There is a TSB for your engine, but for an earlier year - not sure if it extends to the '21:

2.0 Turbo TSB

I'm guessing you'll need to take it into the shop to get it diagnosed and fixed. Could just be the TSB fix, water pump may be going bad, leak around the thermostat, or deeper engine issues but checking the steps above may start pointing you in the right direction.

Good luck.
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