It is caused by a combination of factors, including:
- Coolant leaks
- Overheating
- Rust and corrosion
- Mixing different types of coolant
If you see sludge in your radiator or expansion bottle, you should take your car to a mechanic to have it diagnosed and repaired.
Repairs may include:
- Replacing the radiator
- Replacing the expansion bottle
- Flushing the cooling system
- Adding a coolant additive to prevent further sludge buildup
Ignoring sludge in your radiator or expansion bottle can lead to catastrophic engine damage, so it is important to take action as soon as possible.
Here are some tips to prevent sludge from forming in your Chevy radiator and expansion bottle:
- Use the correct type of coolant for your vehicle.
- Keep your cooling system clean and free of leaks.
- Flush your cooling system every 30,000 miles or 2 years.
- Avoid overheating your engine.
