Chevy Venture overheating problem

Chevy Venture overheating problem

Posted in the Chevrolet Venture* Forum

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leonel

Calgary, Canada

#1 Feb 25, 2009
I have a 2000 Venture and have been battling an overheating problem for 2 years. I was having coolant loss and was getting air in the system which would cause the vehicle to overheat. I would then have to bleed the air out by using the air bleeding valve located on top of the water pump side of the engine. I replaced the lower manifold and upper manifold gaskets, the water pump, the thermostat, overflow tank hose and the radiator cap. I still have the problem of air getting into the system. If the car sits in the cold for more than a few hours, you have to keep bleeding the system until it is at full heat. It seems the colder it is, the more this happens. It almost seems that when the enging cools off that rapidly, air is getting pulled in from somewhere. When the temp is warm out like 20 to 30 degrees, the system doesn't have this problem. There is never any visible leaking under the vehicle either. I have tried everything I can think of, if anyone has had or heard of this problem, please HELP!!! pls. some one email to me [email protected]
jay

United States

#2 Mar 9, 2009
I have the same problem but reversed in cold -20 to 33 it works ok but 40 to 65 it over heats and stops everything>I have change coolants and blow out heater core but problem starts after one month.
Jim Unsworth

Stoney Creek, Canada

#3 Mar 26, 2009
Sounds silly to me but I had the same overheating needle fluctuating problem and got it fixed by replacing the leaking water pump and installing a new thermostat. You see the thermostat is so hidden away and difficult to replace on the Venture so it doesn't get replaced. Mine did and since then the needle is just coming over the horizon.
marteen-j

Marietta, GA

#4 Apr 14, 2009
It is a sealed system, so if it is sucking air in, then it is also leaking out somewhere. There are a few exceptions such as a head gasket leaking where it is pushing compression air at high pressure into the cooling system. When you run the engine, hot or cold, do you see bubbles popping up to the radiator neck. If so, does it smell like gasoline or exhaust?
Tina O

Allegan, MI

#5 Dec 10, 2009
It is most likely the head gaskets, a problem GM has known about since 1997 with these vans, but for some reason never fixes or recalls. I had to have my fixed on my Venture ($2300)...yeah Thanks GM!!!

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learned to hate chevys

Bennington, VT

#6 Jan 17, 2010
hmmmmmmm , they took my post down , wondr why lol
Fran

Coatesville, IN

#7 Feb 27, 2010
I am in the midst of an overheating & wildly fluctuating temp gauge problem. I had hoped it was the thermostat- but the day after changing it the temp swings where back and the engine oil became contaminated with water-looked like coffee with cream in it.This means head gasket as far as I know. One note to any about to tackle the thermostat replacement: my Hanes manual gave a horrible from the bottom technique that included removing the exhaust pipes and studs-DO NOT DO IT THAT WAY. Remove the throttle body, and all you need is a shorty 13mm wrench or flat ratchet to remove the housing bolts. Anyone with any suggestions about the head gasket job?
Dave

Battle Creek, MI

#8 Mar 10, 2010
Head gaskets!! the dex cool,, eats away at the material over time, even after you have had the manifold gaskets redone, and had the green stuff put in. We just did the head gaskets on our 02, Had to get 2 reman heads, as 1 was warped beyond repair and the other cracked really bad. Buddy did it for me for $250 laber, but ea reman head was $250 plus the gasket and head bolt kit cost a total of $740,, So yeah $1000 bucks later. I'm all good to go. All with my van only having 77000 miles! Good thing I bought it real cheap!
Josh

Bloomfield Hills, MI

#9 Mar 11, 2010
My 2002 venture has same problems and is in the shop getting fixed, new intake manifold gaskets and new head gaskets and possibly new heads. GM used poorly made gaskets that fail after prolonged exposure to Dex-Cool antifreeze, they know of this failure but never issued a recall so $1900 later its all out of pocket for us the consumer.... Oh well we all need vehicles..
Jason

Oxford, MI

#10 Oct 27, 2010
1998 venture 2 month battle with overheating is now over. For 2 months the motor would overheat. I changed the water pump, thermostat and radiator. Nothing fixed the problem. Finally determined I had a head gasket leak. With 120,000 miles I was not interested in spending $1800.00. 2 weeks ago I used
BLUE DEVIL HEAD GASKET REPAIR. I followed the direction perfectly and the problem is gone. Whole job cost about $100.00. I no longer smell coolant and the temp. gauge stays steady at the first line. I would recommend this fix to anyone.
Matt

Montgomery, AL

#11 Nov 30, 2010
Dave wrote:
Head gaskets!! the dex cool,, eats away at the material over time, even after you have had the manifold gaskets redone, and had the green stuff put in. We just did the head gaskets on our 02, Had to get 2 reman heads, as 1 was warped beyond repair and the other cracked really bad. Buddy did it for me for $250 laber, but ea reman head was $250 plus the gasket and head bolt kit cost a total of $740,, So yeah $1000 bucks later. I'm all good to go. All with my van only having 77000 miles! Good thing I bought it real cheap!
What type of head gaskets did you go back with? GM or aftermarket? if you have time to answer, will you email me at [email protected]?
Matt

Montgomery, AL

#12 Nov 30, 2010
What type of head gaskets did you go back with? GM or aftermarket? if you have time to answer, will you email me at [email protected]?
dexter1962

Loudonville, OH

#13 Dec 26, 2010
Josh wrote:
My 2002 venture has same problems and is in the shop getting fixed, new intake manifold gaskets and new head gaskets and possibly new heads. GM used poorly made gaskets that fail after prolonged exposure to Dex-Cool antifreeze, they know of this failure but never issued a recall so $1900 later its all out of pocket for us the consumer.... Oh well we all need vehicles..
That's why GM went bankrupt and Americans are buying Honda and Toyota.
chris

United States

#14 Feb 10, 2011
Does anyone know how to bleed the system. I know there is 2 screws to bleed but wich gets opened first?

Since: Feb 11

Port Orange, FL

#15 Feb 17, 2011
Help, My 1999 Chevy Venture is leaking coolant the temperature gauge is up and down and I am losing coolant all the time. After having the thermostat changed some days it works great and other days it's up and down. But the engine is not over heating. They just purged it yesterday for air in the lines. It didn't help. Should I check the fan fuses first?
DADS 02 VENTURE

Yuma, AZ

#16 Feb 17, 2011
I very confused about my overheating problem on my 02 venture. I replaced the thermostat,water pump and bypassed the two heater cores. The temp gauge still continues to bounce around between the half way point and just before the red. I bled the system and now I am stuck. I am also have a service engine soon light on now, dont know if it is related. Does anybody have an idea what could fix this?
Jake 2000 Venture POS

Overland Park, KS

#17 Mar 2, 2011
i have a 200 chevy venture (lord help me) that belongs to my best friend and his wife and their 3 children. this is the only vehicle that whole family can use. so PLEASE help if can. Started overheating just out of the blue. i installed a new thermostat and water pump (everyone knows how much fan that was) bled the system and is still overheating! did compression test on all cylanders and everything checks out ok so, pretty sure not a head gasket. i can get the thing to run fine in the driveway at idle and sometimes around the neighborhood seens fine. as soon as i get to a highway or 2 miles away OVERHEATS. so PLEASE ANY suggestion would be greatly appreicated. if ya can help me fix problem and live somewhere by Kansas City, Mo i'll buy ya a beer or dinner getting desprite. thank you,
Jake
[email protected]
Ernesto

Calgary, Canada

#18 Mar 11, 2011
Jake 2000 Venture POS wrote:
i have a 200 chevy venture (lord help me) that belongs to my best friend and his wife and their 3 children. this is the only vehicle that whole family can use. so PLEASE help if can. Started overheating just out of the blue. i installed a new thermostat and water pump (everyone knows how much fan that was) bled the system and is still overheating! did compression test on all cylanders and everything checks out ok so, pretty sure not a head gasket. i can get the thing to run fine in the driveway at idle and sometimes around the neighborhood seens fine. as soon as i get to a highway or 2 miles away OVERHEATS. so PLEASE ANY suggestion would be greatly appreicated. if ya can help me fix problem and live somewhere by Kansas City, Mo i'll buy ya a beer or dinner getting desprite. thank you,
Jake
[email protected]
My 1998 did the same thing and found out that the air bubbles collect at the thermostat preventing the coolant to touch it and opening. I decided to drill a little hole on the new thermostat, right on the lip, before I installed it and like magic problem solved. So by drilling the hole the bubbles are pushed through and there is constant water flow to the thermostat, opening when it is supposed to. Hope it helps, I know it worked for me.
DADS 02 VENTURE

Yuma, AZ

#19 Mar 18, 2011
DADS 02 VENTURE wrote:
I very confused about my overheating problem on my 02 venture. I replaced the thermostat,water pump and bypassed the two heater cores. The temp gauge still continues to bounce around between the half way point and just before the red. I bled the system and now I am stuck. I am also have a service engine soon light on now, dont know if it is related. Does anybody have an idea what could fix this?
Let me update you since I last posted. I continued to try and find out what the problem is, I checked my oil and disappointment arose when i seen the color of the oil (milky). From what I recall from my automotive schooling is that it indicates a bad head gasket. After researching online a bit I noticed that these motors (gm 3.4l) have bad head and intake gaskets. Now my question is about fix. Do you have to pull out the engine to change the gaskets? From what I understand you drop tranny and sub frame thru the bottom and engine thru the top after taking everything off. Does anybody have any experience with this fix??????????HELP??????????
CKelley

Melbourne, FL

#20 Mar 19, 2011
How can you tell if they ( Chevy dealer) did change a head gasket. Can someone please let me know?

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