It’s a cool morning.
Cooler than it’s been in weeks.
You roll out expecting an easy run — good air, cooler temps, nothing pushing the truck too hard. But before long, you notice the temperature gauge creeping up. Not spiking. Just climbing. Slowly. Steadily. Enough to make you uneasy.
You back off the throttle.
Change gears.
Try everything you normally would.
But no matter what you do, the temperature won’t settle. On a day like this, it shouldn’t be happening. You know something’s not right.
You limp it back into town and make the call.
We get you in straight away.
Once the truck’s in the workshop, we don’t guess. We run it up on the spot and start checking temperatures properly. Using a heat gun, we measure the top radiator hose and then the bottom radiator hose.
The readings tell the story straight away.
The engine is getting hot… but the heat isn’t moving through the radiator like it should.
That points us in one direction — the thermostats.
To be certain, we pull them out and do a simple but effective test. They go into a pot of boiling water. A healthy thermostat should open as the water heats up, allowing coolant to flow.
These ones don’t move at all.
That confirms it.
The thermostats have failed closed, restricting coolant flow and causing the engine to overheat — even on a cool morning.
Fresh thermostats go in.
We refill the cooling system, bleed it properly, and run the truck back up to temperature. This time, the heat readings between the top and bottom hoses make sense. Coolant is flowing exactly as it should.
We take it for a test drive.
The temperature stays steady.
No creeping. No guessing. No stress.
Same day, you’re back on the road — confident the issue has been properly diagnosed and fixed, not masked or ignored.
Overheating problems don’t always come from obvious places like radiators or hoses. Sometimes it’s the small components — like thermostats — that quietly cause big issues when they fail.
That’s why at Webbie’s Mechanical, we test, confirm, and verify before replacing anything. Because getting it right the first time means less downtime, less cost, and a truck you can trust to keep working.
📍 Webbie’s Mechanical
When your temperature doesn’t make sense, we find the reason — and get you moving again.
