Engine flush

[K9Gunner]

I am at 276k miles on my 2005 Yukon 5.3. Wanting to do an engine flush. I have LiquiMolli and Amsoil engine flush. Which one should I use?


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[ks03]

I’ve always been skeerd of engine flushes. I prefer the idea of reduced interval oil changes, which should eventually get you to the same point.

 

[K9Gunner]

I do 3k already.


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[afpj]

What kind of issues are you having that makes you consider a flush?

 

[K9Gunner]

Having some lifter noise


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[JonnyTahoe]

I am at 276k miles on my 2005 Yukon 5.3. Wanting to do an engine flush. I have LiquiMolli and Amsoil engine flush. Which one should I use?


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What are you waiting for. Your bought the stuff so why not use it and see if it fixes the lifter. Which one.. flip a coin.

 

[JonnyTahoe]

Having some lifter noise


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Lifter noise. Ya 276k your going to have some noise once in a while. After the flush it could actually get worse. see what happens.

 

[dougo]

My thought use Marvel Mystery oil as an additive it helped quiet mine , also make sure you don`t have a loose spark plug sounds just like a lifter. I have flushed mine at 150 to clean the out of the pan

 

[Rocket Man]

A lot of times on an LS, what sounds like lifter noise is actually an exhaust leak from broken exhaust manifold bolts which these engines are notorious for. I would check those first.