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Here’s an in-depth teardown and analysis on the infamous GM LS engine!

In this video, we discover one of the most popular V8 engine, the GM LS series, which debuted in the mid 90’s and was used in many vehicles in General Motor’s lineup in the following two decades. A 4.8L LS Engine from a 2003 Chevy Silverado is completely disassembled and analyzed to find out why this engine is so popular and successful: Its small form factor, abundance and availability, cheap price, huge aftermarket support, reliability and strength.

Unlike newer overhead cam design engines, the LS managed to take the crown as one of the best V8 engines with its antiquated push-rod design. This design sets the camshaft in between the “V” of the engine, and uses individual push rods to power the valves on top the engine heads.


In this video we also examine a very neglected and sludged up engine and find out just what happens when you don’t change your oil, in addition to a few other weak spots to look out for if you are thinking of buying a vehicle with GM V8 engine, or building one to swap into your project car.


Engine teardowns and rebuilds can be done with common hand tools that can be purchased here: Impact Wrench:
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Engine hoist
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Impact sockets:
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Breaker bar:
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Angled needle nose pliers:
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Skip to section in the Video:
0:00 Introduction
0:55 Teardown
9:53 Component Analysis
17:50 Final Thoughts


This is the Camera I use:
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