Blown head gasket.
To remove the radiator drain plug on a 1998 Chevy Venture, first ensure the engine is cool and the vehicle is on a level surface. Locate the drain plug at the bottom of the radiator, then use a socket wrench or pliers to carefully unscrew it counterclockwise. Be prepared for coolant to drain out, so have a container ready to catch the fluid. Once the coolant has fully drained, you can replace the plug and tighten it securely.
for my 2000 Chevy Venture I use DexCool. It is the ONLY one recommended by GM.
Open plug at bottom or rear bottom of radiator
When the motor is cool, remove the radiator cap, start vehicle and wait for the temp to reach normal. Shortly thereafter, the thermostat should open and you should see coolant being circulated in the radiator.
On a 98 venture the starter is located in front and just under radiator. Simple to reach and change. I learned the hard way.
change your thermostat.
I've been told that a sensor located in the plastic reservoir has gone bad. I'm not sure where the sensor is located. It could be located inside the tip of the plastic hose that goes from the radiator to the reservoir.
how hard is it to replace a water pump on a 1998 chevy venture van?
The coolant temp sensor screws into the thermostat housing. This is located where the top radiator hose connects to the engine.
Low on coolant, stuck thermostat, faulty fan clutch, plugged radiator inside, plugged radiator outside,
no- 1998-2000 Chevy Venture vans only have a relay for the fuel pump and no fuse.
The wiper motor on a 1998 Chevy Venture is up under the vents next to the windshield. It is bolted to the firewall.