Engine flush

K9Gunner · Sep 24, 2020

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 · Sep 25, 2020

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 · Sep 25, 2020

I do 3k already.

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afpj · Sep 25, 2020

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

K9Gunner · Sep 25, 2020

Having some lifter noise

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JonnyTahoe · Sep 25, 2020

K9Gunner said:
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 · Sep 25, 2020

K9Gunner said:
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 · Sep 28, 2020

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 · Sep 28, 2020

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.

Engine flush

K9Gunner

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ks03

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K9Gunner

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afpj

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K9Gunner

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JonnyTahoe

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JonnyTahoe

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dougo

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Rocket Man

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