Radiator Issues – What to Look for and How to Fix Them

If your engine is getting hotter than it should, the radiator is probably the first thing to check. A faulty radiator can lead to overheating, loss of power, and costly repairs if you ignore it. Below you’ll get the most common signs, easy DIY checks, and clear advice on when to call a professional.

Top Signs Your Radiator Is Failing

1. Coolant leaks. Look under the car after it’s been parked. Patches of green, orange or pink fluid mean the radiator or its hoses have a hole.

2. Engine temperature spikes. If the gauge climbs into the red zone quickly after you start driving, the coolant isn’t circulating properly.

3. Steam from the engine bay. White or grey steam is a clear warning that the radiator is overheating or the coolant is boiling.

4. Low coolant level. Even if you can’t see a leak, a dropping coolant level means something is escaping – often the radiator.

5. Rusty or discolored coolant. Fresh coolant should be clear or bright pink. Brown or milky fluid signals internal corrosion or a head gasket issue.

DIY Checks and When to Call a Pro

First, let the engine cool for at least 30 minutes before you open the radiator cap. A sudden burst of hot steam can burn you badly.

Next, press the radiator hose gently. It should be firm but give a little under pressure. A soft, sagging hose can mean air in the system or a failing pump.

Run the engine with the heater on high for a few minutes. If hot air blows from the vents, the coolant is circulating through the heater core, which suggests the radiator may still be working.

If you notice any of the signs above or your DIY checks are inconclusive, it’s time to book a professional. A qualified mechanic can pressure‑test the radiator, flush out any blockage, and replace worn‑out seals. At Northwich Tyres Centre we can run a quick cooling‑system inspection, replace a leaky radiator, or fit a new one if needed.

Remember, regular maintenance is the cheapest way to avoid big radiator headaches. Check coolant level every month, replace it according to the manufacturer’s schedule (usually every 2‑3 years), and keep the radiator fins clean of debris.

Got a radiator that’s been acting up? Bring it to Northwich Tyres Centre for a thorough check. Our team will tell you if a simple fix will do or if a new radiator is the smarter move. Keep your engine cool, keep your wallet happy.