Can You Put Lq9 Pistons in a Lq4

The short answer is yes, you can put LQ9 pistons in a LQ4 engine. The main difference between the two engines is that the LQ9 has forged internals and can handle more power. The LQ4 has cast internals and is not as strong.

If you are planning on increasing the power of your engine, it is recommended to upgrade to forged internals.

  • Remove the old pistons from the Lq4 engine
  • Clean the engine block and make sure all of the old piston rings are removed
  • Install the new pistons into the Lq4 engine block
  • Torque the connecting rods to specifications using a torque wrench
  • Reassemble the rest of the engine and install it back into the vehicle

Lq4 to Lq9 Piston Swap

If you’re looking to upgrade your engine, a piston swap is a great way to go. The Lq4 to Lq9 swap is one of the most popular swaps around. This swap will give your engine more power and torque, as well as improve its overall performance.

Here’s everything you need to know about this popular engine upgrade. What is an Lq4 Engine? The Lq4 is a 6.0-liter V8 truck engine that was produced by General Motors from 1999-2007.

It’s known for its high reliability and durability, making it a popular choice for those looking to upgrade their truck or SUV. What is an Lq9 Engine? The Lq9 is an upgraded version of the Lq4 engine.

It was also produced by GM, but only from 2007-2009. The main difference between the two engines is that the Lq9 has forged pistons and connecting rods, which makes it stronger and more durable than the Lq4. Additionally, the Lq9 has cylinder heads with larger intake and exhaust ports, which improves airflow and increases power output.

Can You Put Lq9 Pistons in a Lq4


How Do You Know If My 6.0 is an Lq9 Or Lq4 Pistons?

If you have a 6.0L GM engine, it will either be an LQ9 or LQ4. To tell the difference, you need to look at the block casting number and the head casting number. The LQ9 has a block casting number of 12561467 and a head casting number of 090.

The LQ4 has a block casting number of 12563293 and a head casting number of 862.

What Pistons are in a Lq4?

LQ4 pistons are high performance, forged pistons that are designed for use in race engines. These pistons are made from high strength aluminum alloy and feature a number of design features that make them ideal for use in high performance applications. The most notable feature of the LQ4 piston is its “D-shaped” combustion chamber which allows for better flame propagation and higher compression ratios.

The LQ4 piston also has a number of other design features such as an oil ring groove that is located above the wrist pin, and special hardened valve reliefs that allow for increased durability under high loads.

How Strong are Lq4 Rods?

LQ4s are one of the most popular engines used in drag racing. They’re incredibly strong and can handle a lot of power. Many people have been able to get their LQ4s to produce over 1,000 horsepower with the right modifications.

The rods in particular are very strong and can withstand a lot of force. With the right pistons and other components, an LQ4 can be built to handle even more power than that.

LS Piston Installation (LQ4 6.0)


In short, yes you can put LQ9 pistons in a LQ4 engine but there are a few things to keep in mind. The main difference between the two engines is the compression ratio; LQ9s have a higher compression ratio than LQ4s. This means that if you’re running high octane fuel in your LQ4, you may want to consider using lower octane fuel in your LQ9.

Additionally, the piston rings on an LQ9 are designed for less clearance than those on an LQ4 so you’ll need to shim them accordingly.

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