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Engine Overheating

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Use Prestone 50/50 mix the green stuffs

Check if it has an airbleed screw-if so open it up and remove the resevoir bottle cap, now put coolant in it untill it comes out of the airbleed screw then close the screw. Now start it up and put heater at high-let it idle till it comes up to temperature-keep an eye on the resevoir keep it fill at all times, once the upper hose gets too hot-stop you're done
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Wednesday, November 1st, 2017 AT 8:12 PM (Merged)
Tiny
BEANER
  • MEMBER
  • 2 POSTS
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 98,000 MILES
I have a 99 Lumina. In the past year, I lose engine coolant slowly. When the engine gets hot, I turn the air on and cools. Silly? But, lately, I'm losing coolant faster. And engine gets hot quick. I would also know the engine is getting hot because heat didn't work, and cool air was luke warm. Then the air kicks in. Last night, I did lose a whole tank of coolant. I filled it again this morning, and made it to work. Any ideas? Thank you!
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
The first thing you need to do is pressure test the cooling system and determine where the leak is. This engine is notorious for leaking intake manifold gaskets
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
HSOBCHINSKY
  • MEMBER
  • 5 POSTS
  • 1999 CHEVROLET LUMINA
Engine Cooling problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic

Well I finally took your suggestion and tore down the engine. What I found was lower intake gasket split and leaking just above the trans bell housing and decided to pull the rear cylinder head off also. What I found there was I think cylinder #2 definately is burning coolant, this cyl. Is extreamly clean and wet compared to the other two that have carbon build up.
I could not find where the coolant is entering from, I inspected the Head, Gasket and Cylinder walls. The only suppision I have is a vertical white line on the cylinder wall and I sent a pic.
What I don't understand is before the tear down I did a pressure test on all cylinders and they all held pressure about (100 psi) for about 2o minutes each. How can I find where the coolant is coming from.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,262 POSTS
Sorry, but we didn't get the picture. As far as coolant getting into the cylender, it either comes from an intake leak, headgasket, or a cracked head / block. THere are no other ways for it to get into the cylender.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
MOTOMIKE228
  • MEMBER
  • 3 POSTS
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 152,000 MILES
Engine Cooling problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic 152000 miles

I replaced the intake manifold gasget and now when I drive after about 10 min the temp gauge goes to about 180 to 200 is this the normal driving temp?
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
RENAUDTN
  • MECHANIC
  • 636 POSTS
Yes it is.
Your thermostat opens around 195.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
CGDIVER
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 139,000 MILES
Heater problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic 139000 miles

my car temp gets really high then the temp light comes on then I hear some flapping by the gas pedal and firewall then the temp goes back to normal for awhile then rises back up.I have the heater on but its cold when I hear the flapping noise the air changes it gets warm for a little bit then back to cold.I never had a problem with my heat it was always hot now its cold and car temp gets high please help.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
ERNEST CLARK
  • MECHANIC
  • 1,730 POSTS
You have air in your cooling system. That's why your heater doesn't get hot.

When you hear the "flapping" noise, that's because when your rev your engine, the water pump speeds up and forces the air bubbles out of the way. Then your heater will get hot until it the heater core fills up with air again.

There's an underlying cause why there's air in your system. You'll have to find it.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
GIS
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 97,472 MILES
Engine Cooling problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic 97472 miles

I have oil leaking into my rad and I am not sure what this is from. Can u help

it does not overheat
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check the transmission fluid level if low that is the oil you see. The transmission cooling tank in radiator is leaking into coolant.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
EDRAGT
  • MEMBER
  • 2 POSTS
This is more than likely Tranny Fluid from the Transmission Cooling tank. If so, you will want this to be resealed and have the radiator flushed numerous times. You will also want to replace all of the hoses involved as the tranny fluid eats through the rubber.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
KLCAMERON
  • MEMBER
  • 4 POSTS
  • 1999 CHEVROLET LUMINA
Engine Cooling problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic

I just bought a 99 chevy lumina a few months ago it seems to be losing coolant it doesn't seem to be leaking (It doesn't show up on my driveway) it isn't in the oil or the transmission fluid. I was wondering about the intake manifold, is there any way to check?
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
DNAPRORACING
  • MEMBER
  • 120 POSTS
Get a pressure check done. A bad head gasket can make coolant vanish as well. I had a cutlass that drank up the coolant, turned out to be a cracked block. Doh!
But get it tested, it could be a simple solution.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
DUCK23310
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 20,000 MILES
Engine Cooling problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic 200, 00 miles

sorry for spelling. Where does it go. Putting in a new one. The theromostat
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS


https://www.2carpros.com/forum/automotive_pictures/170934_lumina_thermostat_housing_1.jpg



Welcome, my info showed the above location, 3.1L engine.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
GMFTB63
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 142,000 MILES
Engine Cooling problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic 142000 miles

I bought my car over the summer noticed it used a little more antifreeze then it should, but now that its winter where I live its using a lot of antifreeze. What could be the problem?
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
ERNEST CLARK
  • MECHANIC
  • 1,730 POSTS
If the coolant isn't leaking out on the ground, then it's leaking inside of the motor.

Check your oil. If it's a milky white, then the intake gasket is blown and the coolant is leaking into the oil.

If not, then you have a leaking head gasket and it's leaking out of the tail pipe.

As cheap as your motor is, I'd buy a used one with low miles. (If you can find one)

It'll be about the same price as fixing your motor, but you'll have a lot more reliability. And used motors usually come with a 12 month/mile warranty.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
ACOYNE
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 160,000 MILES
Engine Cooling problem
1999 Chevy Lumina 6 cyl Front Wheel Drive Automatic 160000 miles

I have a 1999 Chevy Lumina. I have engine coolant in my oil. It sometimes runs hot and the heater does not work. What type of problem could this be?
Thanks
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum, there are service bulletins about the intake manifold gasket causing oil/coolant leak. I can't be sure that is your problem, just a thought.
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Wednesday, November 1st, 2017 AT 8:13 PM (Merged)

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