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Old 04-20-2008, 06:42 PM   #1
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Coolant leak


SHould I use Prestone Super Sealer. I have tried all the hoses etc. and cannot fine where the leak is comig from. Any suggestions? Also, the radiator does not seem to have the coolant flowing as fast as it should through there.... the water pump was just replaced, so was the thermostat. Everything was drained and refilled, but the coolant leak was before this...

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Old 04-20-2008, 08:10 PM   #2
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You need to find the leak.You don't want to stuff anything into your ride you don't need to.Does it leak when it sits or when it runs or both?Could be radiator,t-stat housing.Although you may have fixed the coolant leak and then inadvertanly started another one.Can you see the coolant leaking on the ground or do you just open the rad and see that your coolant has disapperaed?I've seen pinholes in radiators that leak when the car heats up but it dissapates from the heat and you can't even see it.I wouls suggest borrowing a pressure tester and pressurizing the cooling system and checking it out.Could be one of the new hoses leaking at the clamp.Worse case scenario could be a head gasket.Although you would probably be having more exstensive problems than that.Overheating all the time.Coolant blowing back through the overflow tank(compression leak).A little more detail please.

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Old 04-20-2008, 08:12 PM   #3
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if its from the radiator i would suggest putting a small amount of pepper directly into the radiator, its not a long term solution but works really good.
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Old 04-21-2008, 07:58 AM   #4
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i say fix it right. if you can't find it, pay a good mechanic to pressure test the system, they know what they're looking for.
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Old 04-21-2008, 12:13 PM   #5
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It's leaking at a slowly but surely pace. Every couple of days I will have to put in a 1/4 of a container of prestone. I can smell it while I'm driving, but it's not overheating. And I don't see it leaking from anywhere.

If it was a blown headgasket, what would the symptoms be?

What's a pressure test?

How do you tell if the radiator you had put in is a cheap POS or not? It doesn't seem like it let's the coolant flow at a fast rate through it.

The rest of the other parts I did myself after the radiator, "long story" but I put in the thermostat, sending unit and water pump.

Any help is appreciated!!
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Old 04-21-2008, 03:27 PM   #6
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Forget the headgasket theory.You would have already had major problems by now.(more than likely).If your rad was not working the way it should then again,you would have overheating problems.Don't worry about the rad for now.Concentrate on the leak.If you can smell it,it's leaking.A preesure tester is a small pump(loks like one of those small hand held soccer ball pumps)that you attatch to the radiator and you pump it up to pressurize the system.Once there is pressure on the system then you can check for leaks while the jeep is off.You could pick one up at NAPA fairly cheap and you'll have it for whenever.Make sure your rad cap isn't leaking either.
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Old 04-21-2008, 06:43 PM   #7
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ya, check your cap. and i'm all for someone learning to fix their jeep, but if you can't see the leak now, you probably won't see it with a pressure tester. but you might, if you're interested in fixing your stuff pick one up. but if you don't know where to look, it might not help you. so, if you don't think you'll find it, thats when i say pay a good mechanic to test it and tell you what it is. pay him $50, and then you can fix it yourself. or, a pressure tester even at napa is probably $100, pick it up and let her rip. good luck, let us know either way.
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Old 04-22-2008, 03:12 PM   #8
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I can smell it, but I can't see it and it's buggin the **** outta me. There's no spots on the pavement and no visible leaks.
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Old 04-22-2008, 03:32 PM   #9
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Quote:
Originally Posted by jeeper95yj View Post
I can smell it, but I can't see it and it's buggin the **** outta me. There's no spots on the pavement and no visible leaks.
It's probably evaporating while the engine is hot and doesn't leak with a cold engine because there is no pressure once it cools down. So a pressure check should help because you can pressurize the cooling system with a cold engine. So it can't evaporate before you see it.
If you had a bad head gasket you would see coolant in the oil (muddy brown oil) and/or white vapor out the tailpipe.
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Old 04-24-2008, 10:02 AM   #10
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coolant leak

sure it is not a head gasket? save some time and money have the system pressure tested. most shops will be decent and charge a 1/2 hour labor.This will save you time and agrevation in the long run. good luck.

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