kyledye25

The only thing I need is a radiator. And maybe the hoses. But ill buy those this week. I want to know why its smoking.... my cooling system even now with an old rad is running real good. But I think something else is causing this smoke. Idk if its cuz its getting to warm while highway driving or what. But it stays cool all other times. Even today when its 90+ degrees.

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djb383

Absolutely positive smoke is at the cat? Could be oil on hot exhaust somewhere. Don't forget a new fan clutch.....much easier when the old rad is out.

Cherryokee

X2 on the fan clutch. Definitely worth a quick checkout.

kyledye25

Lol did you all read....lol I'm getting a Taurus fan to replace my clutch fan. It works fine. Just would be better. New rad, hoses, and e fan soon. Is this a head gasket problem? I'm not concerned about my cooling system....it works fine. Could be better though. Smoke coming from somewhere. Could be head gasket once it gets too hot. Because it never smokes any other time.

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papod

how does the bg work great?

djb383

Yep, we read, but u r questions and overheating statements are in present tense, and your plans are in future tense. Until u tell us what u have done, it's kinda hard to guess what u r future plans will yield. The stop leak goes directly in the rad, not in the overflow bottle.

kyledye25

It can be put in the over flow bottle. The BG rep says its good in case you don't want to throw it all in at once. If your skeptical of the product. It worked. Just like he said it would. I am getting new stuff for the jeep. But no one knows what the smoke could be? I have ideas. But I want to see if anyone has has had this problem at all. I know if I put a new rad it would never happen. But its a problem and I want to fix it now before it gets worse. I think its the bead gasket. So I think that's on my list to do very soon. I just find it funny when people state stuff to do that I already did. Or will do. The fact is it will smoke and I don't know why. I know it does it when it runs a little hot but it shouldn't at all. I have never over heated this jeep. Maybe the previous owner did. That's why I would like some input. I'm sure a few people have uad this happen....

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kyledye25

Well I'm home after the 3 hour drive home. Of course it was dark and much cooler. Never went over 210 unless I tromped on the gas. And I did so a few times. But never got high enough to turn the efan on. Even when I hit construction and was creeping along it never got hot enough for the efan to run. So its a little weird but the head gasket is the only thing that comes to my mind. So its something I want to do soon and not wait for it to actually completely fail. A blown head gasket is something I don't want to happen to my jeep. So if replacing it now prevents it then I want to do it. I know there are some of you that say if it ain't broke don't fix it. But I just can't wait for it to brake. I don't like bring stranded or having to pay for an unnecessary tow. Especially when it could have been prevented. Just how I see things.

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djb383

[QUOTE=kyledye25;1021375.........But no one knows what the smoke could be?..........[/QUOTE]

I believe there have been several suggestions as to what the smoke could be....no?

kyledye25

BG did work. Real well. Stopped all leaking. I cleaned all the dried coolant that was sprayed every where and what not. Still clean a week later. Havnt added any coolant.

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kyledye25

Well my O2 sensors work like they should. My fans work. Both. Work just like new. Thermostat and water pump are new. Working great. Rad is old but working. Not great but it does work. I'm getting 17 mpgs on average. It gets driven mostly city but every so often a little bit of highway. Which will get me 18 mpgs or so. I may reset my computer. I didn't do that after my tune up. I did plugs, wires, cap, and rotor. Ran a carbon cleaner through the vacuum line. BG product. Worked good. Also a fuel injector cleaner from BG that you add to the tank. Have done that twice. I also cleaned my throttle body as well as many sensors. Cleaned my coolant temp sensor as well. Moved my intake air temp sensor from the intake manifold to the air box. Found the thread on here and did it right after my tune up. I have done wiring before and it seems to be fine. What else needs down? People just say do this do that. I will do a compression test when I get a chance. But I'm moving this week. So may not happen. Also buying a new rad, getting a Taurus efan, new leaf spring bushings, 1 inch shackles, and probably an add a leaf set up. I just did my rear shocks a week or so ago. Still a little sagging in the rear. New shocks up front with small spacer is on my list. But bushings are first. Sway bar bushings are on the way. Bought them last night. I just want to here if anyone had this happen to them and what they did to fix it or if it got worse and then they figured it out and fixes it. I don't want to hurt this wonderful 4.0 motor. The thing runs great! Absolutely love it. Last thing I want to do is blow the head gasket and possibly ruin my head. And so you all know this post is kind of an update so you don't have to go back to read..probably wouldn't anyways. Lol. This is a 96 country.4.0 high output with an auto tranny. Command track. So with all that said no one has had this happen? I do think the head gasket was done before I bought it. This because the gasket on the intake and exhaust manifolds look new. As well as others. The guy also said just flushed the coolant. Which I didn't believe after I did it and it looked old. Oh and I flushed it twice. Once not long after I got it. Then it leaked a little coolant so that's when I did the t stat and water pump. So I flushed it then too cuz I wanted to be safe. Still leaking but not terrible. So hats when I added the BG stuff. Ran cooler and all leaking stopped. Now what.....guess after the compression test I won't know. After the test it may point me in the right direction.

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freegdr

i would check the clutch fan for proper operation

kyledye25

UPDATE: drove 3+ hours each way today. On the way up to my parents the Jeep smoked for only a few short seconds. Went away quickly. I was driving at about 65 for a good 40 minutes. Then came up to a toll and it smoked while I was slowing down. That was it for the way up. I was driving 60-65 mpg the entire time. I have a new 3 row rad, thermostat, waterpump, a/c compressor, belt, plugs, wires, cap, rotor....few other small things. I believe something is leaking onto the exhaust. It happened on the way home....I was hammering the jeep a few times. So when it smoked it did so for a minute or two...more then usual. Coolant is spot on....marked it before I left. It's spot on when warm and cooled down. Oil is spot on. Tranny fluid is the only thing I didn't check today before I left. It looks like somehow something is leaking onto the exhaust right before the cat. It kind of coats the metal underneath right above the cat. It was wet when I looked. And looked like it was dripping onto the hot exhaust. Then smoking. Not sure what though in what it is. It was hot so I didn't touch it or anything. Looks like more is coated. I cleaned it all off recently knowing I was going on this trip. So I will need to rack it up and take a look. Any ideas? It not a head gasket...I thought it was but the smoke isn't coming from the exhaust. It's hitting the exhaust and smoking. Not coming out of the exhaust pipe. The rear hatch of the jeep is covered in spots. Like grease or something. I'm assuming from whatever is leaking. This only happens when driving on the highway for decent lengths of time. Never city driving. No specific temperature. The new rad keeps temps under 210. I'm not sure what this could be exactly. I'm sort of stumped. Hoping to get ideas before I get a chance to take it to work and put it up in the air so I can take a look. I find it sort of hard to believe no one has had this same problem.....I'm assuming it happens. The jeep has new everything almost....everything is flushed and has new fluid all together. this thing runs like a champ other then this little issue. Jeep drives no different when it smokes. Temp didn't go up this time. Oil pressure didn't move. Rpms didn't jump or anything. When it happened on the way home I slammed on the gas and no more smoke....just the same amount. Smoked for a bit longer then usual. It's not super thick but enough to notice and I'm sure tick off the people behind me. Anyone? Just start throwing ideas out there I guess.....anything. It will get me thinking and ill know what I need to look for. Thanks

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kyledye25

Oh and my clutch fan works 100%. E-fan 100%. I truly dont believe its cooling system related. But I guess I never know.

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94JeepCherokeeMan

Clean the engine with the engine brite heavy duty stuff and everything underneath. This can reveal a lot, as I've learned. Maybe the smoke is coming from grease off the driveshaft? Is there a lot of grease by the zerk on the front shaft? Is the rear main seal leaking and possibly blowing oil droplets onto the cat under heavy acceleration (heavy acceleration=high oil pressure=higher chance of oil seeping/leaking)? I'm just throwing a couple ideas out there. My Jeep's cat was removed by the PO, so I've not had this problem, man.