Lexus 4.3L (261 cu in) firing order — what is it?
The guide to mastering the Lexus 4.3L firing order for a smoother drive.
Before the recent 5.0L V8 engine, Lexus made some exceptional and durable powertrains. It all started with motors like the 4.3-liter V8 and if you own a Lexus vehicle powered by this engine, reading this guide on the Lexus 4.3L (261 cu in) firing order will help keep it running smoothly.
We’ll also cover the cylinder configuration within the engine so you’ll have a clear picture of how to inspect the engine’s cylinders and properly maintain it.
Lexus 4.3L firing order
Let’s discuss the most important points first – the Lexus 4.3L firing order is 1-8-4-3-6-5-7-2 which is a different firing order from the 4.0-liter and the 4.6-liter Lexus V8s. That’s why it’s so important to use this particular firing order to avoid any mistakes.
If you are wondering why it’s so important to use the adequate firing order, it’s because that’s the only way you can properly check the cylinder firing timing. You can also apply the firing order to check the spark plugs and ignition coils if one of the cylinders fails to fire in the pre-determined moment, so that can lead to swift and affordable changes.
Lexus 4.3L cylinder diagram
The next crucial thing to know is the cylinder outline of this engine. Since it’s a regular V8, there are two cylinder banks and this engine uses an “even” and an “odd” cylinder bank. The first cylinder is located in the right-side bank, or the “odd” bank in other words.
The rest of the cylinders of the odd cylinder bank are cylinders number 3, 5, and 7. The opposite-side cylinder bank has cylinders 2, 4, 6, and 8. So, you’ll start with the first cylinder at the front of the engine within the driver’s side cylinder bank, and you can move your way through the rest by following the firing order.
Lexus 4.3L vehicle applications
Another important thing to know is the list of all the vehicle models that used this V8 engine under the hood. So, we’ll give you a complete list and you can check if your car fits the description and uses the 1-8-4-3-6-5-7-2 firing order:
- Lexus GS430
- Lexus LS430
- Lexus SC430
- Toyota Soarer
- Toyota Crown Majesta
The same base engine was also used in the Toyota Supra GT500 racecar so all the listed vehicles feature the mentioned firing order.
As you can see from our guide, the Lexus 4.3L firing order is pretty specific among all the Lexus V8 engines out there. So, we are happy to have been able to help with the precise firing sequence and hopefully, you’ll be able to use it for the benefit of your engine’s longevity.