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Old 03-05-2011, 12:26 AM   #1
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95 yj radiator question I need some help

Hey guys
My jeep has the 4 cylinder engine and what might be a radiator problem.

I took the cap off today to check the antifreeze levels because I've got a leak somewhere that drains it every month or so. When I took the can off there was a brown film over it. I've done some light mudding and a little off roading with it lately. My question is could mud or dirt have gotten in ky radiator through the leak? Would a radiator flush and me fixing the leak solve this? Or is it a sign of a bigger problem?

I know the leak is in the lower passenger side area and as far as I can tell not a hose problem. Also could it be rust even though the jeep isn't very rusty?

Any help would be very much appreciated. Thanks guys!

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Old 03-05-2011, 12:34 AM   #2
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It should say cap not can, and my not ky, sorry for not proofreading.

There's also a bad knock at high rpm's which I think is an unrelated exhaust issue, just trying to give all the problems I can to let you guys tell me how to fix it!

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Old 03-05-2011, 12:37 AM   #3
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I think ur best bet is go f urself.......love ya buddy!! Thanks for the help on my engine. Now let's do yours. Sorry have no idea why its that way
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Old 03-05-2011, 04:21 AM   #4
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You mentioned the antifreeze leaks down monthly. Does it leak on the floor or just goes down without seeing a leak. I have seen a brown film in radiator and it was from a blown head gasket and a cracked head. It is possible to get oil in the water the same way it is possible to get water in your oil. A compression test on the cylinders should point you in the right direction. The knocking at high rpm's might be a rod knock or wrist pin. Hope it is not as serious as this, but they are possibilities.
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Old 03-05-2011, 05:42 AM   #5
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Quote:
Originally Posted by chefbean43 View Post
I think ur best bet is go f urself.......love ya buddy!! Thanks for the help on my engine. Now let's do yours. Sorry have no idea why its that way
With that type of off the wall crap, I think you need to go sit somewhere and have a little chat with yourself. Or maybe a professonial.
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Old 03-05-2011, 12:47 PM   #6
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Originally Posted by tnjeeprider
You mentioned the antifreeze leaks down monthly. Does it leak on the floor or just goes down without seeing a leak. I have seen a brown film in radiator and it was from a blown head gasket and a cracked head. It is possible to get oil in the water the same way it is possible to get water in your oil. A compression test on the cylinders should point you in the right direction. The knocking at high rpm's might be a rod knock or wrist pin. Hope it is not as serious as this, but they are possibilities.
I don't see the leak on the floor. The leak is so slow I think it may only do it when the engine has warmed up. And the knock turned out to be an exhaust issue. (a bracket rusted through) can I do a compression test at home or is it something to take to a shop? I'm wheeling on a budget here. Also could it be anything other than a blown head gasket. Such as a radiator that needs to be replaced?
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Old 03-05-2011, 12:49 PM   #7
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Also there is no oil leak, or water in the oil from what I can see.

Thanks for the help
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Old 03-05-2011, 03:10 PM   #8
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All you need for a compression test is a Compression gauge, though often a buddy helps or is necessary depending on the style of gauge.

I would buy a manual, Chilton or Haynes (though they are the same company now).
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Old 03-05-2011, 09:40 PM   #9
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If I had to give my 2 cents......... I would say let's get mine runnin and pull yours in and rip it apart like we did to mine?? Im just sayin......
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Old 03-05-2011, 10:40 PM   #10
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Don't jump to any immediate conclusions with a head gasket issue. If it is not overheating or loosing heat you may be getting ahead of yourself. I'm not saying that can't be the issue but when there is oil in the antifreeze it is very obvious. It gets real thick and gunky and will usually even flow over and stand in the overflow. How long has it been since you have had the coolant flushed? If the antifreeze breaks down and has lost it's ability to protect the system then electrolysis takes place and the cooling system actually starts to rust. I would go to a parts store or a local shop and have them test the antifreeze and see where the ph level is at. And I agree that you should go rent a coolant pressure test kit and find where the leak is coming from. Good Luck!
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Old 03-06-2011, 12:56 PM   #11
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Originally Posted by L98 YJ
Don't jump to any immediate conclusions with a head gasket issue. If it is not overheating or loosing heat you may be getting ahead of yourself. I'm not saying that can't be the issue but when there is oil in the antifreeze it is very obvious. It gets real thick and gunky and will usually even flow over and stand in the overflow. How long has it been since you have had the coolant flushed? If the antifreeze breaks down and has lost it's ability to protect the system then electrolysis takes place and the cooling system actually starts to rust. I would go to a parts store or a local shop and have them test the antifreeze and see where the ph level is at. And I agree that you should go rent a coolant pressure test kit and find where the leak is coming from. Good Luck!
Thanks buddy I'm going to rent it tomorrow. But it doesn't run hot or lose heat and its been too long since a coolant flush ill start there.

Thanks for all the help you guys are life savers

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