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Old 08-01-2007, 11:01 AM   #1
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Need help! engine overheating

Well, this is probably going to be long but i'll try to sum it all up.
I will start out saying that i have a 2002 jeep wrangler 6 cylinder, with about 66,000 miles.
About a month ago my engine started to overheat, so i changed the thermostat and flushed the radiator and it ran normal for about 2 weeks. Then i had a long trip from michigan to ohio, well on the way it started to run at about 220, then eventually shot up to redline. I shut to motor off and saw that the coolant was in the overfill, so i waited till the radiator soaked it back up and drove on down the road. I made it home and it didnt overheat, but still ran a little warm. Well the next day i went to start it, and it was misfiring. I went to autozone got new spark plugs, a new radiator cap, and a new thermostat. It seemed to run fine for about a week, and then the same problem came about, So it has been misfiring when i start it up, but if i go down the road a little bit, shut it off and turn it on again it dosent misfire.

Well, i finally just gave it to the jeep dealership, and they did a pressure test on the radiator, and said it had a seal that was busted and needed replaced. I also asked them what was wrong with the engine, and if the spark plugs needed to be replaced again because of all the overheating, and they want more money to do that.

So, can i just put some stop leak in it for a week till i get a new radiator, and what is the best type of radiator for my money...(they want $750 to install a new radiator and hoses). And do you think there are any internal damages from the sounds of it, i think that maybe the spark plugs are just fouled out from the overheating?

And if you read this entire post, thanks alot... lol

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Old 08-01-2007, 11:05 AM   #2
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Old 08-01-2007, 11:37 AM   #3
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thats probably where i will order my rad, but i still need to know about the stop leak and if there could be anything internally wrong with my engine, and what?
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Old 08-01-2007, 11:42 AM   #4
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maybe change your distributor cap?
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Old 08-01-2007, 12:03 PM   #5
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Not a huge fan of stop leaks but Bars leaks it probably the best DO NOT USE ALUMNASEAL It works good but it will clog up your new radiator, As far asthe plugs change them aand see where it goes, What type of fouling are you getting? And I do belive yours a DIS Engine being a 6cy.
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Old 08-01-2007, 12:37 PM   #6
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X2 on the stop leak...don't use it unless you plan on selling it.

If you are going to throw in a new rad, I would add a new pump too while you are at it. Are you losing fluid? Does your exhaust smell sweet? If so, then you may have a bad head gasket or cracked head and are burning it. That will certainly foul your plugs.

Have you checked you oil? Does it look OK? If it looks like a milkshake, then you need to get a new head gasket and oil change.

Good luck....let us know how you make out.
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Old 08-01-2007, 12:48 PM   #7
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2002 do not have distributor caps.
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Old 08-01-2007, 12:49 PM   #8
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02's do not have distributor caps.
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Old 08-01-2007, 02:57 PM   #9
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just put a 3core radiator in its easy to install the main cost will be the radiator about $500
although Ive seen some 3core radiators on ebay for under $200
just they are not alumminum

but the stealership wants to much to install a radiator
on my comanche I paid $180 for a heavy dudy stock replacement from auto zone

If it where me I would just up grade to a 3 core radiator
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Old 08-01-2007, 03:37 PM   #10
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Search this site for radiator recommendations. Not too long ago someone posted a link to a vendor with a sweet looking direct drop in replacement radiator for only $165.
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Old 08-01-2007, 03:57 PM   #11
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all of these radiators should be drop in and not a bad price for a 3 row radiator

http://search.ebay.com/search/search...tor&category0=
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Old 08-02-2007, 01:44 PM   #12
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well, i just ordered my radiator and they said they would bring it to me tomorrow right to my front door. It's a 2 row raditor and i got it, tax and shipping included for $165.
Im going to install it some time tomorrow along with some new plugs, and see how it goes from there.

And thanks for all the replys.
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Old 08-02-2007, 03:46 PM   #13
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I am thinking your overheating might have cause the head gasket to blow. When you cheked the plugs did you see any dampness? Radiator problem should not effect the engine to misfire.

When you changed the coolant and thermostat. Did you let the enging heat up to get all the air pockets out.. This might have cause the overheating in the first place.

I dould do a compression check. for head gasket answer.
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Old 08-02-2007, 08:43 PM   #14
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my jeep gets hot to mostly when I run the ac but it also gets to 115 out here.
but when it gets hot like that I get the misfire thing to
I did check the head gasket and it is fine
compression is fine to
in fact after I removed the code everything is running as it should



in about a week I will be putting in an electric fan and get rid of the belt driven fan that should give me more power
If it still gets hot then I'll put in a 3row radiator in
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Old 08-03-2007, 08:57 PM   #15
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I just got my new radiator and i finally got it installed this evening. I started it up, and it was running really funny like it was still misfiring but the engine didnt come on. Well, i took it down the road a little bit and it seemed as if it wasnt misfiring it at all while i was driving it, just at idle. So, i shut the engine off and then when i went to start it back up the exhaust blew out a bunch of smoke and the engine is running super rich. If anyone has any idea what it could be please reply. It seems as if everytime i fix one thing there's still another...
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Old 08-03-2007, 11:05 PM   #16
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your check engine light should of come on
if so what code are you bringing up
you can do the three key turn it should bring up the code (if its a 2000 or newer)

and check your cat make sure its not cloged

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