Here's why:
* Combustion byproduct: The combustion process in your engine produces water vapor as a byproduct of burning fuel. This vapor is invisible until it cools and condenses.
* Cooling system: Some of this water vapor comes from the combustion process itself, but a small amount can also originate from minor leaks in the cooling system (though a substantial leak would be more noticeable).
* Cold exhaust: The exhaust system, especially in colder weather, cools the water vapor significantly, causing it to condense into liquid water. This water then drips out of the exhaust system. Because the exhaust system is usually lower on the passenger side, it's more likely to pool there and drip out.
When it's *not* normal:
While condensation is the most likely explanation, it's worth noting that excessive amounts of water, or water accompanied by other symptoms (white smoke, sweet smell, overheating, loss of coolant) could indicate a problem such as:
* Head gasket leak: This is a serious issue that allows coolant to mix with the combustion process, resulting in more water vapor in the exhaust. This would usually be accompanied by other symptoms.
* Cracked engine block or cylinder head: Similar to a head gasket leak, this allows coolant to enter the combustion chamber.
* Cooling system leak: A significant leak in your cooling system could lead to more water vapor in the exhaust, although this would likely also result in other problems, like low coolant levels.
What to do:
1. Observe the amount of water: Is it a small amount of condensation, or a significant stream? A small amount is normal.
2. Check your coolant level: Regularly check your coolant reservoir to ensure the level isn't dropping unexpectedly.
3. Look for other symptoms: Are there any other signs of engine trouble, such as overheating, white smoke from the exhaust, sweet smell (indicating coolant), or loss of power?
If you notice excessive water, or any other concerning symptoms, it's best to have your Chevy Venture inspected by a mechanic to rule out more serious problems. But for a small amount of water dripping from the passenger side exhaust, it's highly likely just condensation and nothing to worry about.
