The best way to do this job is to drop the engine, and transmission with the engine cradle. This will give you more room to work and make it much easer. If you do not have a lift this job will take a very long time and be very hard.
The thermostat on a 2004 Chevy Venture is changed by draining the radiator, removing the upper radiator hose, and unbolting the thermostat housing. The old thermostat and gasket can then be removed and replaced.
The best time to replace a 2004 Chevy Venture timing chain is when it becomes weak or broken. It is not something that needs replaced routinely.
I replaced a 2003 Chevy Venture thermostat once before. It is buried on the top right side of the engine under the throttle assembly. You can see the thermostat cover by following the 2 inch black tube from the top of the radiator to it. It is easy to replace one you remove the throttle assembly which is very difficult to do, especially if you are not familiar with engine repairs. This is not a four screws and your done job. Take it to a mechanic if you are unsure. Luckily, I had a mechanic who helped me when I did it!
buy a repair manual at any parts store and it explains it step by step
The heater core is plugged. Blow it out with a compressor. If that does not work replace the heater core.
under the van, in the center.
Dexcool
there is no timing belt -- only a timing chain that does not need to be replaced
on the right side of the motor The thermostat is beneath the throttle body & behind the exhaust crossover pipe. It's a ridiculously big job considering it's only a thermostat you're trying to replace
The thermostat on a 2001 Chevrolet Venture 6-cylinder 2-wheel drive car is located where the radiator hose ends. A replacement thermostat for a 2001 Chevy Venture is priced between $8.00 and $11.00 depending on where you buy it.
Dexcool
unless there is noise coming from the timing chain, you should never need to replace it.