What Causes the Wuling Hongguang Radiator to Boil Over
4 Answers
Here are the reasons why the Wuling Hongguang radiator boils over: 1. Water jacket in the cylinder block has sand holes or perforations leading to coolant loss: If no abnormalities are found during inspection, you can refill the coolant and continue driving. 2. Thermostat failure: When the engine temperature is too high, you can touch the upper and lower radiator hoses to check their temperatures. If there is a significant temperature difference between the two hoses, it indicates the thermostat is not functioning. Below are additional details on the causes of radiator boil-over: 1. Water jacket in the cylinder block has sand holes or perforations leading to coolant loss: If after driving a certain distance, the temperature remains high and coolant loss is observed upon stopping, it is likely due to sand holes or perforations in the cylinder block water jacket. 2. Thermostat failure: If replacement parts are not immediately available, the thermostat can be removed as an emergency measure, but it should be replaced as soon as possible. 3. Dirt accumulation on the radiator: Driving for extended periods on dirt or muddy roads can cause dirt to adhere to the radiator, which over time reduces cooling efficiency and leads to overheating.
As an experienced mechanic who frequently works on Wuling Hongguang vehicles, I've found there are quite a few reasons for radiator boiling. The most common is insufficient coolant, whether from leaks or natural evaporation, leading to engine overheating and boiling. Next is fan issues - a broken fan or blown fuse reduces cooling efficiency. There's also the thermostat getting stuck in the closed position, preventing coolant circulation and heat dissipation. Water pump failure can cause poor coolant flow, making boil-overs likely. Additionally, radiator clogs or coolant line leaks frequently occur, especially when driving in dusty areas with poor road conditions. If this persists, the engine could sustain serious damage, so never force drive when it's boiling - stop, let it cool, and check fluid levels. I recommend regular cooling system inspections and timely antifreeze top-ups (usually the blue-cap variety will do). It's best to get a comprehensive check at a professional shop to prevent potential hazards.
Last time I drove the Wuling Hongguang on a long-distance trip, the radiator boiled over, which was quite frightening. The main reason was a coolant leak or insufficient coolant, so I checked the chassis for any water stains. The fan not spinning is also quite common, especially in the scorching summer heat—loose fan belts or motor issues can prevent proper cooling. A faulty thermostat is another hidden danger; if it doesn't open, it blocks coolant flow, causing heat to build up. Additionally, if the water pump makes unusual noises or is worn out, poor cooling performance can easily lead to overheating. I immediately pulled over to check and found the coolant level was too low. Adding distilled water helped stabilize the situation. Ignoring this issue can affect the engine's lifespan, so don't take it lightly. Make it a habit to check the coolant reservoir monthly, and replace it if the color turns murky.
When driving the Wuling Hongguang, if the radiator boils over, it's mostly due to a cooling system malfunction. Low coolant levels cause rapid temperature rise, and a burnt-out or stuck fan not working is also a major cause. A stuck thermostat preventing coolant from reaching the radiator leads to engine heat buildup. Additionally, leaking or rust-clogged hoses can obstruct flow. It's advised to immediately turn off the engine for inspection to avoid engine failure. You can check if the fan is spinning and if the coolant level is adequate yourself.
