Question about 2001 Chevrolet Monte Carlo

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Car overheating replaced everything and still overheats

My 2001 monte carlo ls 3.4 keeps overheating. within the last 6 weeks i have replaced upper and lower radiator hoses, thermostat (put a 180 in it to run cooler) water pump, fans (and hardwired them to a switch, always have them on when engine running) and new radiator cap. I took it to a radiator shop yesterday and they told me it was the intake manifold gasket. ok cool so i replace it. this morning i go to get some gas and within 3 miles it keeps spiking. i have no coolant in my oil, thus i think the head gasket is good. i replaced daggum near everything i could think of short of the radiator itself. i live in south florida so nothing is frozen or needs to be thawed. someone please help. im running out of ideas, and money

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  • 52 Answers

Is it truly overheating? Could be a bad sensor or gauge.

Posted on Dec 24, 2014

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  • Chevrolet Master
  • 3,592 Answers

Try a pressure test on the radiator while it engine is running.. If your head gasket is broken the compression of the engine goes into the cooling system. If the pressure rapidy increases it would indicate a head gasket problem.

Posted on Dec 24, 2014

  • Brett Duxbury
    Brett Duxbury Dec 26, 2014

    I just thought of a possible cause. How much oil is in the engine is it at an adequate level on your dip stick

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Posted on Jan 02, 2017

SOURCE: Oil in over coolant tank

since you are running green coolant in a car designed for dexcool that may have contributed to a leaky intake gasket and/or head gasket. dexcool was specially formulated to run in the GM vehicles because the gaskets and seals can be easily distorted when the wrong chemicals are soaking them. oil in the coolant is usually either a head gasket or the lower intake manifold leaking into the cooling system. also if the intake gaskets werent done properly that would cause oil in the coolant as well. i suggest you take your car to a reputable shop and have it tested for a headgasket leak and to have the lower intake inspected.

Posted on Feb 17, 2009

  • 14036 Answers

SOURCE: 2001 Monte Carlo continuously overheating...

DID YOU BLEED THE COOLING SYSTEM.THIS VECHICLE WHEN YOU REMOVE MOST OF THE COOLANT TO REPLACE WATER PUMP OR RADIATOR AND THERMOSTAT YOU HAVE TO BLEED OUT THE AIR TO GET COOLANT TO CIRCULATE PROPERLY. TO BLEED COOLANT SYSTEM WITH ENGINE COOL LOCATE BLEEDER SCREW AT WATER PUMP BY HOSE OPEN BLEEDER SCREW A LITTLE TO LET SOME AIR OUT WHILE YOU.POUR ANTIFREEZE IN RADIATOR.WHEN RADIATOR COOLANT LEVEL STOP DROPPING CLOSE BLEEDER SCREW AT WATER PUMP BYPASS HOSE.START ENGINE LET IDLE UNTIL GET WARM AND COOLANT DROPS IN RADIATOR ADD MORE COOLANT.WHEN COOLANT START RISING AT RADIATOR.PUT CAP ON RADIATOR LET VECHICLE IDLE A LITTLE AT A TIME.UNTIL THERMOSTAT OPENS THEN YOU CAN WAIT A LITTLE WHILE TAKE A LARGE RAG OVER RADIATOR CAP OPEN A LITTLE YOU WILL HEAR AIR STEAM HISS THROUGH CAP BUT DONT OPEN ALL THE WAY.WHEN HISSING STOP SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME SO YOU WONT GET SCALDED.YOU CRANK ENGINE UP A LITTLE STOP WAIT A WHILE BEFORE OPEN RADIATOR CAP.KEEP DOING THIS PROCEDURE UNTIL RADIATOR COOLANT STOP DROPPING.WHEN COOLANT STOP DROPPING.BLEEDING COOLANT SYSTEM COMPLETE.IF VECHICLE KEEP OVER HEATING CHECK OIL CRANK CASE LOOK LIKE MILK SHAKE YOU HAVE A BLOWN HEAD GASKET.

Posted on Dec 03, 2010

  • 180 Answers

SOURCE: 2001 monte carlo ls 3.4 overheats!! replaced everything

You have to bleed the air out of the system. There are 1 maybe 2 bleeders on the front of the engine on the cooling system bypass pipe one near the upper hose the the othe on the drivers side of the pipe. They are brass with a small bleeder valve in the middle. Get the car up to temperature and take your time to allow all the air out. Refill cooling system after it cools. Hope you didn't do any damage running it hot.

Posted on Dec 27, 2013

Testimonial: "I did bleed the system and its the same thing. is it possible to have a bad head gasket without having coolant in the oil?"

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1 Answer

2001 monte carlo ls 3.4 overheats!! replaced everything


You have to bleed the air out of the system. There are 1 maybe 2 bleeders on the front of the engine on the cooling system bypass pipe one near the upper hose the the othe on the drivers side of the pipe. They are brass with a small bleeder valve in the middle. Get the car up to temperature and take your time to allow all the air out. Refill cooling system after it cools. Hope you didn't do any damage running it hot.

Dec 27, 2013 | 2001 Chevrolet Monte Carlo

1 Answer

2001 monte carlo trans slipping


Transmission is due for a rebuild

Stop using it --- as it will only overheat more
& ruin hard parts inside it

There is no fix for slipping

Oct 26, 2012 | 2001 Chevrolet Monte Carlo

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I have 2001 Monte Carlo that was running fine last week. I had to replace the water pump and intake gasket this week. Now when u first drive it. It shifts really hard out of first gear. It shifts fine...


Check and see if there is not a vacuum hose dislodged, the vacuum modulator may not be getting enough vacuum and causing the "hard shift" condition.

Dec 16, 2011 | 2001 Chevrolet Monte Carlo

1 Answer

200w cheve monte carlo overheating,changed,radiator,water pump.


Change the thermostat and the coolat resevoir cap.These are the 2 main things for overheating problems. The thermostat sticks and the cap will let coolant escape from the tank, after a couple of trips the engine overheats. Also make sure your cooling fans are coming on. Physically pull the relays and all fuses, as the do lose contact.

Apr 26, 2011 | 2001 Chevrolet Monte Carlo

2 Answers

2001 montie carlo fans wont cool off engine


if it is overheating try replacing the thermostat first. If it is stuck closed the coolant cant cycle through the engine properly. Also, try a flush and fill.

Feb 25, 2010 | 2001 Chevrolet Monte Carlo

1 Answer

I have a leak in my radiator hose its a 2005 chevy monte carlo.....


It is time to replace the hose. If you wait until later to change the hose, then you will overheat the engine. When replacing the hose, it is best to change both the upper and lower hoses at the same time.

Feb 15, 2010 | 2001 Chevrolet Monte Carlo

1 Answer

How do I connect tranny to radiator coolant lines monte carlo


The lower line off the transmission will connect to the lower radiator fitting and the upper transmission to the upper radiator.
Good luck.
Regards,

May 17, 2009 | 1995 Chevrolet Monte Carlo

1 Answer

Cooling fans wont turn on


Hello. I understand your frustrations as I too own a 2001 monte carlo and have had the same problem...along with several others. My engine temp gauge would show ZERO degrees because of the bad coolant temp sensor. So I replaced it with one from autozone (BIG MISTAKE) The one from autozone was **** and gave the car a different problem. The fans would not run while the engine was running and would run when the engine was off until the battery rundown protector would shut them down. this lasted about 2 weeks during which I had to keep my heater on (in the middle of summer) to keep my car from over heating because my fans wouldnt run. The autozone jerks said "if my temp gauge was working then the sensor was doing its job" and that "there is another problem" Well I finally called the dealership and they told me that autozone is junk and to try advance auto parts and to get the next one up from the cheapest...this is what they use...and NASCAR uses. It was a few dollars more (around $25) Problem solved. However a few months later the cooling fans went completly out..this was due to them experiencing such high temperatures for 2 weeks. I replaced them with ones from a salvage yard for $50. Dont let this happen to you...

May 16, 2009 | 2001 Chevrolet Monte Carlo

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