LS Firing Order [Diagram Explained]

All LS have multi-cylinder engines. They are V8 motors with eight cylinders and have one driving rod. For a vehicle to move effectively, the spark plugs in every cylinder should spark and push the cylinders in a specific way. This is the Ls firing order that links to the proper sequence at which inward engine cylinders are sparked to deliver power.

You can also characterize it as the request in which power is conveyed across various engine cylinders. All LS Engines have a sequence that is 1-8-7-2-6-5-4-3 firing order. You can also re-design it by changing the sequence according to the manual instructions which are 1-8-4-3-6-5-7-2 firing order.

LS Firing Order 2024

The Firing order for Ls is 1-8-4-3-6-5-7-2

Explanation of the Ls firing order diagram? 

The engine Ls order shows the arrangement wherein the power occurs in various cylinders. As there are various sorts of engines, there are various kinds of firing orders as well. The Ls order is 1-8-7-2-6-5-4-3. This is said to be a cross-plane driving rod that is equally divided by 90°.

This is the most important update on the vehicle’s firing order even if it’s small or big cylinders. The authentic LS order is 1-8-7-2-6-5-4-3. The firing order  1-8-7-2-6-5-4-3 makes a fair showing of firing on the other hand between banks. However much as could be expected. With this change, the firing order of cylinders 4 and 7 are exchanged.

This Firing order applies to 

  • Chevy 4.3
  • Chevy 3.3
  • Chevy 3.8

Torque Specifications

Fastener Type Torque Spec
Main Cap Bolts 95-105 ft.-lbs.
Connecting Rod Bolts 40-45 ft.-lbs. (45-50 ft.-lbs. for Boss 351C)
Cylinder Head Bolts (Follow factory torque sequence) 105 ft.-lbs. (125 ft.-lbs. for Boss 351C)
Rocker Arms (Non-adjustable) 18-22 ft.-lbs.
5/16 in. Intake Manifold Bolts 21-25 ft.-lbs.
3/8 in. Intake Manifold Bolts 28-33 ft.-lbs.
Oil Pump Bolt 25 ft.-lbs.
Cam Bolts 40-45 ft.-lbs.
Cam Thrust Plate Bolts 9-12 ft.-lbs.
Harmonic Damper Bolt 70-90 ft.-lbs.
Flywheel/Flexplate Bolts 75-85 ft.-lbs.
Pressure Plate Bolts 35 ft.-lbs.
Front Cover Bolts 12-18 ft.-lbs.

Check out Ford 4.6 Firing Order

What are some major advantages of Ls firing order? 

A few of the most important advantages of Ls order are as follow:

  1. Make the sounds more advanced.
  2. Boost energy.
  3. Improved forces.
  4. Amazing Cooling.
  5. Fast running of the engine.

Changing your engine’s firing order from the conventional version to the better LS request is justified. The methodology is designated “The 4/7 Swap.” All you need to do is just continue. They are going to inform you whether it is worth your money or effort or not. Also, whether it fulfills the necessities or not.

Try Out Firing Order of 5 Cylinder Engine

What are 4.8 LS Order and Cylinder Numbers? 

The 4.8 LS is otherwise called The Vortec 4800. LR4 is the other name for it. It was presented in the ’90s. It’s among the main truck motors of the LS Generation III. It stayed underway until 2007. Also the form of LS Engines, the LR4 is a strong sturdy magnum that is still used today.

The 4.8 LS is quite advanced with superchargers, turbos, high-stream cylinder heads, cams, nitrous oxide, and advanced systems. A very much changed 4.8 LS can create up to 1000 strength. The 4.8 LS was easily available but in limited models. Few of them include the Chevrolet Silverado 1500, the Chevrolet Tahoe, and the Chevrolet Express.

LS Cylinder Numbers Vs. SBC/BBC Cylinder Numbers

All LS, Small Block, and Big Block engines have similar cylinder numbers. They all stick to the LS firing cylinder numbering system. According to the manual, the vehicle’s front, odd cylinders 1-3-5-7 are toward the driver’s side. On the other hand, even cylinders 2-4-6-8 are on the right side. It is opposite cylinder 1 and cylinder 2 but in the same direction.

Try 6 Cylinder Engine Firing Order

LS Vs. SBC/BBC Firing Order: Which is better? 

As you all are aware the firing order of SBC and BBC that is 1-8-4-3-6-5-7-2. There is also a new firing order for LS Engines: 1-8-7-2-6-5-4-3. After amazing virtual experiences and engine tests, GM thought of the LS order. The firing order is perfect according to the vehicle and the system.

Why Is Ls Engine Firing Order Important? 

The perfect ls firing order in an engine outputs at least vibrations in the system. This will lead you towards a smooth ride and will protect both the driver and the traveler from getting into an accident.

Do All LS Engines Have the Same Firing Order? 

An LS series engine’s firing order is completely different from LT1 motors’ firing order. The motor firing order has traded cylinders 2, 3, 7, and 4.

Check 16 Cylinder Engine Firing Order

GM LSX Firing Order Animation LS1 LS2 etc

Jake Mayock