Intro to the LR4, LM7, and L59 LS Family: Gen. 3, 4.8L / 5.3L, Iron Block, Truck Engines LR4 The LR4 was introduced in 1999. Along with the LM7 and LQ4, they were the first LS truck engines. The LR4 …

Upgrading the LR4, LM7, and L59 Engines Getting more power out of my engine On a stock engine, the following upgrades can improve performance and fuel economy: A Cold Air Intake Kit Headers An …

Chevy LM7 Engine Specs LS Family: Gen. 3, 4.8L / 5.3L, Iron Block, Truck Engines

Gen. 3, Iron Block, LS Engines The following specs apply to RPO codes: LR4 LM7 L59 LQ4 LQ9 **Click the blue links in the table for more detailed information**

The only 2 engines with the same technology is the L20 and the LMF. The difference between these engines is Displacement. Pull the oil pan to check the crank and rods.

Identify Chevy LS Engines by VIN Chevrolet's 3rd and 4th generation small block engines are generally known by their RPO code. You can determine the RPO code if you have the Vehicle Identification …

Identify Chevy LS Engines by Inspection Before you begin any project, you need to know the starting point. When it comes to Chevrolet's 3rd and 4th generation small blocks, there can be a lot of …

LS Family: Gen. 3, 5.3L, Aluminum Block, Truck Engines LM4 The LM4 was introduced in 2003 as a lightweight version of the LM7. It was available in GM SUVs until 2005. The LM4 was also known as …

LS Connecting Rod Bolts: First Design vs. Second Design Between 1997 and 1999, GM used 2 different types of Connecting Rod Bolts. Each have different torque specs, so it’s important to know the …

Installation Procedure, Torque Specs and Sequence To properly install your LS Intake Manifold, follow the steps below. This will ensure a good seal to the cylinder ...