Why are LS engines bad?
For an engine that is touted as such a performance-oriented engine, the LS has some shortcomings. Some LS variants have been plagued with bad piston-ring seals. This issue can cause oil-consumption issues. As this issue gets worse it can also create an increasing amount of blow-by in the engine.
Is a 5.3 Vortec an LS motor?
The Vortec 5300 is a small-block V8 GM engine that was produced from 1999 until 2013. While the 5.3L Vortec is based off of the LS engine platform, it itself is not technically an LS engine. The engine went through two different variations during its lifespan, Gen III and Gen IV.
How much do LS swaps cost?
A more realistic starting budget is around $1500 to $2000 for a basic swap using a common truck engine, factory exhaust manifolds, and your existing front crossmember and rear axle. Swaps that require fabricated oil pans, aftermarket crossmembers, or rear suspension overhauls can set you back considerably more.
Are LS engines good for racing?
The aluminum LS engine blocks are nearly as strong as the Gen 1 and Gen II cast iron blocks. … It has loads of other features that are handy for race vehicles, but is simple enough to work on a stock engine. The cylinder heads of the LS engine gives it a huge advantage over the classic small block.
Why do LS engines use oil?
It’s a fact: GM LS engines consume excessive amounts of oil. … Unburned oil expelled from the cylinders can coat the inside of the catalytic converter and prevent it from reaching its proper operating temperature. This creates deposits that impede exhaust flow and reduce power output.