01/09/2026
⛽ PETROL IN A DIESEL - PART 2
DON’T TURN THE KEY!
If you realise you’ve put petrol into a diesel vehicle, one of the worst things you can do is start it.
Once the engine is started, that contaminated fuel can be drawn through the fuel system and into the high-pressure components.
That can turn a wrong-fuel mistake into a much bigger repair.
With the Prado we showed you yesterday, we first needed to work out exactly what condition the engine was in.
So before we went any further, we:
🔧 Used a bore camera to inspect the tops of the pistons and cylinder bores for signs of damage
🔧 Carried out a compression test
✅ Confirmed engine compression was OK
🔧 Installed new injectors
🔧 Replaced the fuel filter
⛽ Bypassed the contaminated fuel tank
🔧 Supplied the engine with clean diesel from a separate container
✅ Successfully test-ran the engine
This gave us a safe way to prove the engine and fuel system before moving on to the final repair.
Friday: we’ll show you how we finished the job and got it back onto clean diesel.