What is a coolant bypass hose for?

The coolant bypass pipe or hose directs coolant flow through the engine based on different conditions of the engine, like a traffic guard who directs traffic into an optimal flow. In the engine, this flow is directed by the thermostat, which closes when cooled.

How does coolant bypass work?

When the engine is cool the thermostat is closed. This allows coolant to circulate through the engine by way of a bypass canal located directly below the thermostat. As the engine warms up, the thermostat begins to open allowing coolant to pass through to the radiator.

How much does a coolant hose cost to replace?

The average cost for radiator hose replacement is between $138 and $159. Labor costs are estimated between $81 and $102 while parts are priced at $57. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.

Why is my coolant hose leaking?

Causes of Coolant Hose Leaks. Unfortunately, even the best hoses will eventually wear out over time. Hose leaks are the most common result of this, and they occur when cracks or abrasions form on the hose. Over time, the cracks get bigger, causing it to leak coolant.

How long do coolant hoses last?

Coolant hoses typically last several years, though anything longer than 10 years may be pushing the limits. Rubber weakens with age and from repeated exposure to hot coolant, so the older they get the higher chance they’ll leak and cause the engine to overheat.

What causes coolant to leak from the bypass tube?

If the o-ring or gasket wear out or tear, coolant will begin to leak from the bypass tube. This may produce a coolant smell from the vehicle’s engine bay. Some coolant bypass tubes are located near the top of the engine, and as a result may produce a coolant smell far before any coolant can be visibly detected without opening the hood.

What should coolant level be for antifreeze leak?

The coolant level should be between the “min” and “max” markings. If the tank is full, what you are smelling is probably not an antifreeze leak. If the tank’s level is below the minimum mark or it’s dry, you’ve likely got a problem and it is time to consult an expert technician.

Why do I have a leak in my bypass pipe?

Wiggle the bypass tube free from the bottom of the thermostat housing and pull it loose from the turbo return tube. 16. At the point you can probably see that the upper o-ring appears to be crushed, pinched, or otherwise damaged. This is the source of your leak.

Why is it important to know if your car is leaking antifreeze?

Antifreeze plays a key part in keeping your engine running properly, so it’s important to know if it’s leaking. If your vehicle is leaking antifreeze, the problem needs to be repaired promptly, before it causes much bigger, more costly issues. Despite its name, antifreeze does more than just keep your vehicle’s radiator from freezing up in winter.