What Causes Low Coolant in the Overflow Tank?

2 Answers
OAaron
08/31/25 7:01am
Low coolant in the overflow tank is caused by a radiator leak. Related information: 1. Introduction: The car radiator, also known as the heat exchanger, is the main component in the car's cooling system. Its function is to dissipate heat. The coolant absorbs heat in the water jacket, flows to the radiator to release heat, and then returns to the water jacket to circulate, achieving temperature regulation. It is an integral part of the car engine. 2. Expansion: The radiator is a crucial component of water-cooled engines. As a key part of the cooling circuit in water-cooled engines, it absorbs heat from the engine block to prevent overheating. Due to water's high specific heat capacity, its temperature does not rise significantly after absorbing heat from the engine block. Therefore, the engine's heat is transferred through the liquid cooling circuit, using water as a heat carrier. The heat is then dissipated through large-area cooling fins via convection to maintain the engine's optimal operating temperature.
Was this review help?
8
0
Share
McAmy
09/13/25 3:22am
Let me share some insights on the issue of low coolant level in the overflow tank. The most common cause is leakage – aging hose connections may crack or the radiator itself might develop fractures, leading to dripping that's visible upon close inspection. High engine temperatures also accelerate coolant evaporation, especially after long summer drives. Worn water pump seals or a faulty radiator cap can cause slow leaks too. More seriously, internal leaks like a blown head gasket allow coolant to burn off, causing faster fluid depletion. I always remind myself to regularly check coolant levels and use proper antifreeze mixtures instead of tap water to prevent rust and clogging. Neglecting this risks severe engine overheating with costly repairs. Prevention beats cure – spending a few minutes monthly for checks and pre-trip inspections saves big on safety and repairs. Since adopting this habit, my vehicle's condition has significantly improved.
Was this review help?
4
2
Share
Expand All
More Forum Discussions

Which Direction to Loosen Wheel Lug Nuts?

For passenger cars, wheel lug nuts loosen counterclockwise (lefty-loosey); For trucks, the left-side wheels follow righty-tighty/lefty-loosey rules, while right-side wheels use lefty-tighty/righty-loosey. Here are the details: Lug nut basics: Passenger car lug nuts loosen when turned counterclockwise - place left hand toward wheel center and lift wrench upward with right hand; Truck lug nuts differ by side - left-side uses reverse threads (tightens when turned in vehicle's forward motion direction), right-side uses standard threads. Tightening technique: Since tires are secured by five lug nuts, first install four in crisscross pattern, then the fifth. Maintain equal turns per nut to ensure even load distribution.
13
1
Share

In which year did Geely acquire Volvo?

On March 28, 2010, Geely officially acquired 100% of Volvo Car Corporation. Below is a partial introduction using the 2021 Geely Boyue as an example: 1. Exterior body dimensions: Taking the 2021 Geely Boyue as an example, it is a 5-door, 5-seater compact SUV with body dimensions of: length 4519mm, width 1831mm, height 1694mm, wheelbase 2670mm, fuel tank capacity 58L, and curb weight 1575kg. 2. Engine: The 2021 Geely Boyue is equipped with a 1.8T turbocharged engine, with a maximum power of 120kW, maximum power speed of 5500rpm, maximum torque speed ranging from 1500rpm to 4500rpm, paired with a 6-speed manual transmission.
11
4
Share

Where is the fuse box of the Buick Verano located?

The fuse box of the Buick Verano is located below the original air conditioning control panel. You need to remove the gear shift lever side panels, then unscrew the 4 screws behind them. After removing the panels, take out the cigarette lighter and remove the cover plate to access the fuse box. Below is an introduction to the Buick Verano: The Buick Verano is built based on Buick's latest family design language, featuring a winged chrome grille, LED automatic sensing headlights, LED taillights, 17-inch ten-spoke dual-tone aluminum alloy sport wheels, and a fastback roof. The interior of the Buick Verano follows the 360-degree wraparound design concept, with dynamic lines and a new cool black color scheme, creating a youthful and sporty atmosphere. It is equipped with a two-piece oversized panoramic sunroof, front multifunctional seats, a three-spoke sport multifunction steering wheel, dual barrel-style gauges with a 4.2-inch high-definition trip computer, and dual-zone independent automatic air conditioning.
19
2
Share

What is the method for marking motorcycle tire specifications?

There are two methods for marking motorcycle tire specifications: one is the code designation method, and the other is the metric designation method. The code designation method is represented as "b-d", where b is the tire's section width, d is the tire's inner diameter (also the tire's diameter), both measured in inches. The "-" in between indicates a low-pressure tire. Below is a related introduction to motorcycle tire specifications: 1. Tire inflation pressure value: The inflation pressure of motorcycle tires generally ranges between 147 kPa and 343 kPa. Sometimes, the tire specification may also include a ply rating at the end, such as 2.75-17-4PR, indicating that the tire's section width is 2.75 inches, the inner diameter is 17 inches, and 4PR means the tire has 4 plies. 2. Functions of the tire: (1) Direct contact with the road surface, bearing the weight of the vehicle body. (2) Utilizing the elasticity after inflation to cushion and partially absorb vibrations and impacts caused by uneven road surfaces during driving.
11
2
Share

Is it necessary to equip a life jacket in the car?

It is not necessary to place a life jacket. Here are the specific details regarding the reasons: Reasons: Because there is no time to put on a life jacket. If the vehicle is involved in an accident and submerged in water, there is no time to open the trunk and search for a life jacket. Many vehicles do not have a connection between the interior and the trunk, so placing a life jacket inside the car serves no purpose. After the vehicle is submerged, the priority is to open the door or break the glass to escape from the car. Essential items to place in the car: Reflective vest - It helps to clearly indicate the driver's position when the vehicle breaks down, serving as a reminder for vehicles behind. Triangle warning sign - Also serves as a warning. It should be placed 50 or 150 meters behind the vehicle. Vehicle fire extinguisher - In case of a fire in the vehicle, a fire extinguisher is needed for rescue.
6
1
Share

Is it necessary to register window tinting on the vehicle license?

No, it is not necessary to register window tinting on the vehicle license. Here are the specific details: Introduction: If the vehicle is tinted with a transparent film, there is no need to register it with the vehicle management office. However, if the tint has color and changes more than 30% of the vehicle's body color, registration with the vehicle management office is required. If the vehicle's color is altered by more than 30% without registration and the modification is not approved, the vehicle will fail the annual inspection. Vehicles with unauthorized color changes may be temporarily impounded by traffic police, and insurance companies generally do not cover accidents involving such vehicles. Tinting considerations: When selecting a tint film, apart from brand and quality, the most important factor is the light transmittance. It is advisable to choose a film with a light transmittance of over 85%, as traffic regulations require a minimum of 70% light transmittance. Films with lower transmittance will not pass vehicle inspections and may impair driving visibility.
5
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.