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Unread 03-01-2013, 03:09 PM   #1
AlexThePhotoGuy
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1985 CJ7 
 
Join Date: Feb 2013
Location: Decatur, GEORGIA
Posts: 132
HELP! Replaced Radiator and Thermo, now engine smoking!

Hey all. Just replaced my leaking radiator and hoses. I also found that the prior owner had taken out the thermostat. I put in a new thermostat (190 degree) and gasket. Flushed the system with distilled water. Refilled with new coolant/water.

I started it and was letting it run to circulate the coolant/water. After about 5 minutes it started squealing. Couldn't tell where the sound was coming from, but it didn't sound like the fan/steering belts. I shut it off and it was smoking.

Side note, it leaks oil- not a lot but some. I (dumbly) just added half a quart of oil without first checking the dipstick. After the squealing and me shutting off the engine, I opened the oil fill knob and smoke came out (some, not a ton).

1. What could the squealing be?
2. Could the smoke be from over filling with oil?

I don't want to run it right now. The temp gauge on the inside doesn't work, so I have no way to know if the engine was overheating.

Thoughts???

1985 CJ7 with 4.2L 258.

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Unread 03-01-2013, 03:18 PM   #2
AlexThePhotoGuy
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Now that I think of it, I definitely overfilled the oil because I added one quart over 2 days without even checking the dipstick (idiot!)

But does that cause smoking and squealing??
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Unread 03-01-2013, 03:19 PM   #3
CSP
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Where is the smoke coming from? Since it happens when you shut it off I assume it's not coming out of the tailpipe when it's running.

The squealing could be anything really. A bad bearing in the alternator or water pump or even just a belt contaminated with coolant.
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Unread 03-01-2013, 03:52 PM   #4
AlexThePhotoGuy
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1985 CJ7 
 
Join Date: Feb 2013
Location: Decatur, GEORGIA
Posts: 132
No smoke from the tailpipe. Smoke is coming from this random hole from the manifold (I just got this jeep last week, so I'm a newbie). I'm assuming that hole is supposed to have a hose going somewhere. See the center of this photo. It definitely smells like something may be burning, though it could be the old rusty coolant that spilled on top of the manifold burning off. It's on the driver side (see power steering on right for reference point).

Update- started it again and let it run for 10 minute. No squealing, but still a little smoke and burning smell from that same spot.
2013-03-01_16-45-00_356.jpg  
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Unread 03-01-2013, 04:02 PM   #5
walkerhoundvm
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1981 CJ8 
 
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That random hole should have a hose on it running to the air cleaner. Can't see if you have an OEM air cleaner, but in any case that just takes hot air from around your exhaust manifold to feed the air intake on cold start ups. It's not actually coming from anywhere but around the exhaust. Smoke coming out of it could be a hole in your exhaust manifold, or something spilled around there - like coolant.
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Unread 03-01-2013, 04:02 PM   #6
CSP
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Sounds like steam, not smoke. Anything you spill on the engine will burn off if you don't wipe it clean.
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Unread 03-02-2013, 11:33 AM   #7
AlexThePhotoGuy
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Thanks for the help guys. Had to go out of town, so I'm going to give it another try Sunday night.
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Unread 03-02-2013, 10:41 PM   #8
johnlaw484
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I'm betting the squealing is from antifreeze spilled on the belts when changing or adding the antifreeze.
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Unread 03-03-2013, 05:48 AM   #9
chooster5000
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1981 CJ7 
 
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Yeah antifreeze on belts makes one hell of a noise. I looked at a 98 Cherokee that had antizreeze dripping on the belt and it's was pretty loud. The guy said it needed a new belt, so he put wd40 on it to quiet it lol, I laughed when he did that
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Unread 03-03-2013, 07:41 AM   #10
wellmax
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1984 CJ7 
 
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first thing i would do is fix the temp gauge,
even if you have to set the new gauge under the hood (temporary), at least this would let you know that you are not letting the motor get too hot.

remember: running a motor without oil is the fastest way to ruin a good motor, letting a motor get hot is the second fastest way to ruin a good motor.
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Unread 03-03-2013, 07:44 PM   #11
AlexThePhotoGuy
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1985 CJ7 
 
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Thanks for the additional feedback.

The good news is that it made the 25 mile trek home today from my friend's house. No smoking, no squealing. Yes- temp gauge is on my short list. Though oddly enough, for about 20 seconds while pulling out of the driveway, the needle registered then it went back down to C. Not sure why. I have owned it for 2 weeks and hadn't seen any activity on that needle so far.

Added bonus- adding the thermostat made the heater start working. Was nice to have on a 40 degree day!
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Unread 03-03-2013, 07:50 PM   #12
walkerhoundvm
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1981 CJ8 
 
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You may just need a new temperature sensor. Mine wouldn't register when I bought it, picked up a new temp sensor and all is well. Alternatively, the temp gauge is burned out. To test - ground the temp sensor on the frame, temporarily, and watch if the needle pegs out. Do it for too long and you're sure to burn it out, so sit in the cab while a helper grounds.
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Unread 03-03-2013, 09:06 PM   #13
AlexThePhotoGuy
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Good advice. I'll pick up a new temp sensor this week. Anyone have a pic of where the sensor is?
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Unread 03-04-2013, 03:56 AM   #14
chooster5000
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Well mines on the back of the head next to the valve cover, or just above the water neck from my experience idk if it changed from a 79 engine
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Unread 03-04-2013, 07:18 AM   #15
walkerhoundvm
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Back driver's side of the block, next to the valve cover as Chooster said. Should have one wire running off of it. You WILL leak a little more antifreeze replacing it.
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oil , radiator , smoke , smoking , thermostat

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