Ask the Car People.SM


Chevy Venture overheating problem

178 messages,  Last post on Feb 12, 2013 at 10:47 AM

You are in the Chevy Venture Forum.

What is this discussion about? Chevrolet Venture, Engine, Van

Messages Page 13 of 18

#118 of 178 Re: Chevy Venture 2003 [bethany380] by k00l4id

May 15, 2010 (4:14 am)

Replying to: bethany380 (May 14, 2010 8:38 am)
Ive also experience the same problem. Turned out there was a pinhole in the side tank of the rad, causing an air bubble in the system. I would suggest making ssure that ALL of the air has been "Burped" out of the cooling system. I had to pull my rad and solder up the hole and re flush the system, should take about 6hours total to get all the air out of the system. Pull the rad cap off, top up the system, drive it for half an hour, park it and check the temp of the rad cap. Im going to bed dollars to donuts that its stone cold(the rad cap). crack the bleeder screw next to the thermostat housing and allow the air to escape. Once the engines cooled down enough top the rad up and close the screw. repeat the process. Just a side note, on mine, the temp would react normally after the first top up and air bleed. Continue to burp it until you are satisfied that all the air is out. On the final burping of air, i would suggest leaving it overnite with the rad cap off, top it up in the morning, run it for half an hour(driving not idling) pull it into the driveway, top up the overflow and mark on the bottle where the level is hot, let it cool down and see where the level is. if the overflow is empty theres still air.

#119 of 178 Re: Chevy Venture 2003 [bethany380] by AJGWHEELS

May 16, 2010 (9:40 pm)

Replying to: bethany380 (May 14, 2010 8:38 am)
first check the flat grey connector thats in front of the fans , sometimes they get burn inside , second do you have rust inside the radiator? this indicates theres a air escape and is not completely sealed or have air inside , need to purge by loosing the 2 valves , one near the water pump and one near where the thermostat is.

#120 of 178 WHAT AM I MISSING? by msargent76

Jun 15, 2010 (9:58 am)

I have an overheating problem with my 2000 Venture also. I have replaced the water pump, thermostat, changed the radiator cap to a vented one in case it overheats again, flushed the system, and when that didn't work, I clean out the system and used blue devil for the head gaskets. The radiator is building tremendous back pressure that backs up into the reservoir when it gets really hot. If you look down into the radiator while it is running, you can see a little rust circulating in the new antifreeze, so I know there is sludge down in the system, how much? I don't know. At an idle, the radiator starts pumping water out where the radiator cap would be, but if you increase the RPMs the water sucks back down into the radiator and you can see the vents in the radiator circulating. The thermostat checks out fine, fans are fine, circulation flows through the water pump and out to the radiator so water jackets seem fine in the engine. Could it possibly be the catalytic converter clogged with the sludge? I'm at my wits end!

#121 of 178 Re: WHAT AM I MISSING? [msargent76] by AJGWHEELS

Jun 15, 2010 (11:11 am)

Replying to: msargent76 (Jun 15, 2010 9:58 am)
you need to purchase a Special GASKET KIT design for VENTURE , its by VICTOR FLINTZ ( hope I got the name right) if it was never done , you need to replace the PLENUM GASKET & THE EXTERIOR GASKET & the rest of the kit parts that come along so you can have Piece of mind , If your good with tools then
buy the HAYNES REPAIR MANUAL for this vehicle , it should take about 2 to 5 days to complete this project. AJ

#122 of 178 Re: overheating problem fixed [k00l4id] by james1967

Jun 26, 2010 (11:07 am)

Replying to: k00l4id (May 28, 2009 9:56 am)
this issue sound similar to mine, i have 98 venture ..had a head gasket changed, after it was overheating, found hole in the gasket.. now the engine seems ok except there is air or pressure in the hoses.. the the needle stays low, except for idle.., i took it in and mechanic fiddled with the relay fuse and put another used one in, and the engine check light went out and the pressure was fine, until i took it on the road for a test..after i gave it some gas couple times..the engine light returned with a little power loss on the accelerator and pressure came back in the hose again and remains that way.
 
this issue is kind of screwy,;mechanic said pump is working but he didn't test it and i changed a new thermostat before i got the head gasket changed (prior), ( used a stop leak product for the rad before i changed head gasket also) there's no leaking of fluids and nothing contaminating the oil, rad been flushed too.
Only other thing i can think of is the AC light stop working short time ago and couple other electrical issues hasn't worked for a longer period.
and when i accelerate putting more load on the engine..(like up hill) the check engine light flashes and power is reduced on the accelerator.

#123 of 178 Overheating by jrumley

Sep 27, 2010 (9:38 am)

I have a 2002 venture. If it idles it slowly goes to red, driving, after five minutes. When in red, heater blows barely warm. The radiator cap and top of engine just warm. In red the engine will preignite and stall. Once stalled it has to sit for fifteen minutes before it will start again. When this happens water vapor comes out of the air cleaner box and water droplets are on the surface of the maf screen.
I have taken out the thermostat, vented the cooling system. I have taken it to a radiator shop, they are not sure. No exhaust gases in radiator. Where is the water vapor coming from. Could it be a bad manifold gasket? Thanks

#124 of 178 Re: Overheating [jrumley] by davy2

Sep 27, 2010 (9:46 am)

Replying to: jrumley (Sep 27, 2010 9:38 am)
With you vehicle running open the hood and check to see if both cooling fans are running. If not turn on your A/C and check again. There are 3 resistor switches inside the fuse block that drive the cooling fans. Turning on the A/C overrides the temp sensors

#125 of 178 Overheat by jrumley

Sep 27, 2010 (10:07 am)

Thanks for the reply. The fans are working and sounds like the correct speed.

#126 of 178 Overheat by jrumley

Sep 27, 2010 (7:23 pm)

Iam the previous owner of the above problem,but. I found it. I pumped up the cooling system to fifteen pounds. Hissing came from the intake manifold near the throttle body. This is critical, since lower cooling system pressure the lower the boiling point, check it out. Anyway, will order the manifold gasket kit from GM.
 
      Tha

#127 of 178 Overheating by jimmie60

Oct 11, 2010 (5:31 pm)

I have replaced the thermostat on my 1998 Chevy Venture and filled the coolant resevor; however, the car still is overheating. I have checked for leaks and have found none. Any suggestions on what could be the problem? The thermostat does not seem to be opening up at all.

Messages Page 13 of 18

To POST a message, please Sign In.

Advertisement

Browse by Category

Browse by Vehicle
   View All Vehicles

Browse by Board
Browse by Topic
View All Topics

Edmunds Community

Advertisement