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2017 Discovery Sport HSE - Coolant Leak & Low Coolant Warning

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David L. · rep 0 · May 22, 6:35 AM · 1 replies · solved · Question

Vehicle: 2017 Land Rover Discovery Sport HSE

Hey everyone,

I've got a 2017 Land Rover Discovery Sport HSE with about 75,000 miles on it. Lately, I've been getting the 'Low Coolant' warning message on the dash, and I've noticed a small puddle of what looks like coolant under the front passenger side of the car after it's been parked for a while.

I've topped it off a couple of times, but it seems to be losing coolant pretty consistently. I'm hoping it's something I can tackle myself, like a loose hose or a simple O-ring. Has anyone else experienced this with their Discovery Sport? What are the most common leak points I should be checking first?

Any advice on where to start looking or specific parts that tend to fail would be greatly appreciated before I take it into a shop. Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 6:35 AM

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Hi Chris,

Coolant leaks are a common issue across many vehicles, and your 2017 Land Rover Discovery Sport HSE is no exception. It's good you're addressing it promptly, as consistent coolant loss can lead to overheating and more severe engine damage.

Here are the common areas to inspect and steps you can take:

  1. Visual Inspection (Cold Engine):

    • Radiator Hoses: Check the upper and lower radiator hoses for cracks, bulges, or loose clamps. Pay close attention to where they connect to the radiator and engine.
    • Coolant Reservoir: Inspect the plastic coolant expansion tank itself for cracks, especially around the seams, and check the cap for proper sealing.
    • Water Pump: This is a very common leak point. Look for coolant residue or drips coming from the front of the engine, often near the drive belt area. A failing water pump might also produce a whining sound.
    • Radiator: Look for green or pink (depending on your coolant type) stains on the radiator fins, particularly at the top or bottom edges.
    • Heater Core Hoses: These run from the engine bay into the firewall. Check for leaks where they connect.

  2. Pressure Test (Recommended):

    • If a visual inspection doesn't reveal the leak, a cooling system pressure test is the next step. You can rent a pressure tester from most auto parts stores. This tool allows you to pressurize the system when the engine is cold, making small leaks more apparent as coolant will be forced out.

  3. UV Dye:

    • Adding UV dye to your coolant system can help pinpoint elusive leaks. Drive the car for a day or two, then use a UV light (blacklight) to scan the engine bay and undercarriage for glowing coolant traces.

Common Causes for Land Rover Discovery Sport Coolant Leaks:

  • Degraded Hoses: Over time, rubber hoses can harden, crack, or become brittle.
  • Water Pump Failure: The seals or bearings in the water pump can wear out, leading to leaks.
  • Cracked Coolant Reservoir: Plastic components can become brittle with age and temperature fluctuations.
  • Radiator End Tank Leaks: The plastic end tanks of the radiator can crack.

When to See a Shop:

  • If you cannot locate the leak after a thorough inspection and pressure test.
  • If the leak appears to be coming from a difficult-to-access area, such as the heater core (which often leaks inside the cabin) or an engine gasket.
  • If you suspect a water pump failure and are not comfortable with the replacement process, as it can be complex and requires specific tools.
  • If the engine is overheating rapidly, as this indicates a significant leak or other serious issue that needs immediate professional attention.

Addressing this quickly will prevent potential engine damage. Good luck!

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