Understanding Common Volkswagen Jetta Radiator Troubles
Your Volkswagen Jetta radiator is very efficient and reliable when it comes to keeping your engine cool, but it is still not safe from various forms of damage. Since a failed radiator leads to a lot of safety issues, it is very important to diagnose radiator problems as soon as possible.
Inconsistent radiator performance
If your Volkswagen Jetta radiator seems to perform perfectly until you start speeding up on the freeway, there's a big chance that something is restricting the flow of coolant within your radiator. Clogged radiators often show signs of failure at high speeds, so you should check for blockages if your engine's temperature suddenly spikes when you're going fast. Some common sources of radiator clogging include dirt, bugs, and rust.
If your Volkswagen Jetta usually overheats because there is too much pressure inside your radiator, you probably have a faulty radiator cap. A problematic radiator cap usually results from seals that have been damaged by coolant that boils and overflows from the radiator. To avoid coolant overflow, make sure that the spring on your radiator cap is not stuck due to dirt and debris. Try checking for signs of corrosion on your radiator cap, since this can also be a common cause of boiling and overflowing coolant.
Low coolant level due to coolant leakage is also a major cause of radiator problems. If you have been constantly refilling your radiator with coolant only to find out that most of it is gone by the end of the week, it's time to examine your radiator hoses for any holes. If you have replaced your radiator hoses but you are still spotting coolant deposits under your vehicle, the leak is probably on the radiator itself. Try checking for bubbles or steam coming out of your radiator to identify the location of the leak.
Other common culprits
Leaking and overheating are the most common symptoms of radiator failure, but it doesn't mean that you don't have to check out other components in your vehicle's cooling system. Many radiators have failed because of faulty thermostats, water pumps, and radiator fans, so make sure that you inspect these components for any defects as well. It is also advisable to do a visual inspection on your radiator to check for blown seams, worn-out solders, and leaky fittings.