Engine Block Specifications. Casting Numbers: 12567392, 12567393, 12551358. Material: Iron. Displacement: 5.3L / 325 cid ...

Along with the LM7 and LQ4, they were the first LS truck engines. The LR4 was available in GM pickups, vans, and SUVs until 2007. It was a 4.8L engine known as the Vortec 4800. LM7. The …

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The LR4, LM7, and L59 have very strong blocks. They can handle over 1,000 hp. using nitrous, a blower, or a turbo. However, you will need to upgrade the internals to handle that kind of …

If you don't have the VIN, you can still identify the engine. Below you'll find pictures and descriptions to help you spot the important differences followed by an identification chart …

The information below applies to vehicles with the original engine still installed. If you have a second-hand vehicle that doesn't match the info below, the engine may have been swapped …

The LY5 was introduced in 2007. It replaced the LM7 as the Vortec 5300. The LY5 was upgraded with Active Fuel Management (AFM) technology. It was available in GM pickups and SUVs …

The block is secured to the engine stand. It may rotate with the added weight of the cylinder head. Installation Process. Press new Dowel Pins into the engine block. There are 2 dowels per side …

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 the Vortec 5300. L33. The L33 was introduced in 2005 …

Engine displacement can be listed in cubic inches (c.i.d.), cubic centimeters (cc), or liters (L). How is it calculated? Displacement is calculated from other engine measurements. You will need to …