How To Diagnose A Cooling System Problem

I'm now going to explain to you how to diagnose a basic cooling problem. First, we start by looking at the expansion bottle here where your radiator fluid is kept and it appears that the fluid is low in there. There are a number of ways you can test that.

We can test it by pressure testing it or we can test it by basically running the engine and sooner, the water's circulating properly. But with the engine running, we test the hoses, so test when it's getting warm. You've got warmth in the bottom radiator hose but the top hose is remaining cold.

This will remain cold for quite some time until the thermostat actually opens and allows all the water to flow from the engine to the radiator around the cooling system, the radiator located here under the front of the vehicle. It could be a number of reasons. It could be a stuck thermostat, it could be the thermostat is not opening, or it could be a blocked radiator.

The first thing we're going to look at is the thermostat, which is basically the thermostat, because it is not opening very easily and it's only allowing to get warm. It's not allowing the hot water to flow out of the engine. So now, it's been running for quite some time.

We now find that the top radiator hose is only becoming lukewarm whereas the rest of the hose is extremely warm and the car is effectively signing to overheat. So, it's now diagnosed that the problem is with the thermostat in this vehicle. But the other thing that you need to be careful obviously is you've got a lot of hot pipes, etc.

which contain, obviously, hot water and moving part. You need to be careful because there's a risk attached with this. If in doubt, I would recommend that you contact your local garage for further advice and perhaps get over to diagnose for you. .