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Old 01-07-2014, 09:29 AM   #1
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Water pump or Thermostat?

Thanks for reading this and attempting any help...

Came home the other day and noticed coolant on the garage floor. Opened the hood and discovered that I was very low and that it looked like coolant had sprayed out of the cap under very high pressure at some point.

Let me tell you that I am no mechanic, but seem to be less than completely worthless at replacing items and saving a fortune at the dealership. My question is..... How do I know what is bad? Is it likely the water pump not pumping coolant, or a thermostat?

Any help greatly appreciated.

Thanks

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Old 01-07-2014, 09:36 AM   #2
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Did you overheat? Is the cap on properly? The coolant recovery tank collects hot overflowing coolant, it shouldn't be coming from the cap, it should go right into the recovery tank. So if it came from the cap that's what I'd be looking into, first, you might have a bad cap.

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Old 01-07-2014, 10:05 AM   #3
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Nothing is ever that simple in my life, but I will check it out and really appreciate the response.
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Old 01-07-2014, 10:05 AM   #4
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Oh, and no I didn't overheat and never noticed a thing until I saw it on the garage floor.
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Old 01-07-2014, 10:11 AM   #5
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Check the cap. I have a feeling that might be your problem, it could be as simple as it wasn't on right, or it could be bad. Make sure the radiator is filled all the way to the overfill hole on the neck before putting the cap back on. Make sure the cap gasket is clean and there's nothing on the surface where it mates to the radiator. Tighten it all the way down.
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Old 01-07-2014, 10:14 AM   #6
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Will give that a shot. Thanks
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Old 01-07-2014, 10:27 AM   #7
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No problem, good luck! Just make sure you don't handle the cap when the engine is hot!!!!!!!!!!!!!! Check things on a cold engine!
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Old 01-07-2014, 10:36 AM   #8
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Had the exact same problem. Drove home from the store. Looked under the jeep for no reason really and coolant was pouring out. The problem is when it pours out while the engine is running it tends to hit the fan and spray everywhere. I couldn't pin point where it came from. The waterpump has a hole in the bottom left front face. Coolant will come out of that when it's broken. It cost me 50 for a new pump, like 12 for a new thermostat, and 5 for a new gasket. Lots more for that coolant haha. I changed it in the school parking lot, I'd never done it before that. It's simple, don't be afraid to do it. There are write-ups online and there's an awesome youtube video I can post which walks you through the whole thing. Let me know, please don't take it to the dealer. I'm tired of getting screwed by them, you probably are too. They will screw you, I guarantee it.
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Old 01-07-2014, 12:16 PM   #9
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Thanks a million and would love that link in the likely event im not lucky enough to have a lose or faulty cap.
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Old 01-07-2014, 06:29 PM   #10
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It is easy enough to determine if it is the water pump. Some parts stores loan out tools or rent tools, so you can pressure test a cold cooling system and in less than 5 minutes know if the water pump is bad, or locate external coolant leaks. Shops will do it for a fee.

The reason I pointed you to the cap is because :
Quote:
Originally Posted by NNeckJeep View Post
I was very low and that it looked like coolant had sprayed out of the cap under very high pressure at some point.

Thanks
It is also the cheapest and easiest to fix. Try the cap, if that doesn't work clean things up and look all around the water pump, or pressure test the system and you'll know in no time flat.
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Old 01-07-2014, 06:48 PM   #11
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And for god sakes make sure you put the right antifreeze in, or you could be in for bigger probs.....
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Old 01-07-2014, 09:16 PM   #12
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And for god sakes make sure you put the right antifreeze in, or you could be in for bigger probs.....
You better believe it with this cold snap!
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Old 01-07-2014, 10:59 PM   #13
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Old 01-09-2014, 10:49 AM   #14
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Thanks everyone. I had it in the shop a week or so ago to have a new bumper put on..... don't ask..... anyway, guessing they removed the radiator cap didn't put it back on tight. I drove in this AM to work, about 15 miles and the temp stayed right in the middle the whole way. Going to drive home and check it later when its not freezing a$$ cold. When I checked the cap to tell you the truth I didn't notice if it was on tight or not I was so anxious to look in the radiator at the coolant level. Guess we'll see.

The above post referencing the "type" of antifreeze has me stumped a little. What do y'all use?

Thanks for the vid tech!
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Old 01-09-2014, 02:10 PM   #15
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Quote:
Originally Posted by NNeckJeep View Post
Thanks everyone. I had it in the shop a week or so ago to have a new bumper put on..... don't ask..... anyway, guessing they removed the radiator cap didn't put it back on tight. I drove in this AM to work, about 15 miles and the temp stayed right in the middle the whole way. Going to drive home and check it later when its not freezing a$$ cold. When I checked the cap to tell you the truth I didn't notice if it was on tight or not I was so anxious to look in the radiator at the coolant level. Guess we'll see.

The above post referencing the "type" of antifreeze has me stumped a little. What do y'all use?

Thanks for the vid tech!
2013, 2014 use OAT antifreeze.

2012 and older use HOAT antifreeze.

Make sure that you use the correct antifreeze, and don't mix the two.......
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Old 01-09-2014, 02:28 PM   #16
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What was in there was orange. I topped with green. Are you telling me I need to drain this thing and go get a HOAT anti freeze? Go figure.... simple problem made worse by my non-mechanical A$$.
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Old 01-09-2014, 02:30 PM   #17
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Quote:
Originally Posted by NNeckJeep View Post
What was in there was orange. I topped with green. Are you telling me I need to drain this thing and go get a HOAT anti freeze? Go figure.... simple problem made worse by my non-mechanical A$$.
What year is yours? Orange would indicate HOAT.
OAT from the Dealer is purple.
So if yours is a 2012, or older, then it is HOAT, orange in color sounds correct.
Different manufactures make different color antifreeze, so green should not be a problem. It should say on the bottle, 5 years, or 150,000 miles.
Just don't mix the purple OAT with it. To the best of my knowledge, OAT can only be purchased from your Dealer, and it's very expensive! About $48.00 a gallon.
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Old 01-10-2014, 12:09 PM   #18
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Thanks OD. Mine is a 2007 so sounds like I should be ok.
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Old 01-10-2014, 10:42 PM   #19
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Mopar antifreeze ( OAT ) purple in color 2013 , 2014, is 10 year 150, 000 mile. I believe 2012 and down is ( HOAT ) 5 yr 100, 000 mile orange in color and yea don't mix.
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Old 01-10-2014, 10:45 PM   #20
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Quote:
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Mopar antifreeze ( OAT ) purple in color 2013 , 2014, is 10 year 150, 000 mile. I believe 2012 and down is ( HOAT ) 5 yr 100, 000 mile orange in color and yea don't mix.
Just tring to catch up to NNeckjeep on number of posts.. Ha lol...
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Old 01-13-2014, 10:32 AM   #21
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Yeah I don't post much. Just like lurking in the shadows and benefiting from all the great posts from everyone else on here. Cant tell you how much I have leaned.....and how much you SOB's have cost me ; )
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Old 01-13-2014, 11:04 AM   #22
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Is this the same Chrysler coolant that turns to mud?
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Old 01-13-2014, 09:51 PM   #23
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Is this the same Chrysler coolant that turns to mud?
What year jeep you got?

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