Ticking lifters?

2007 CHEVROLET EXPRESS
320,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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IMTOOLER59
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when I start it in the morning it clatters till it is at OT, then it quiets almost completely. Today it won't quiet down all the way. I suspect crap in the lifters because When I bought it, I had to pull the oil pan to clean out the sludge and replace the pickup seal. Is there a quick and dirty way to clean out the lifters? it's probably not worth replacing them. but it runs rather well except when it clatters.
Nov 15, 2024 at 4:36 PM
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STRAILER
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With 320,000 on the engine I would say it is worn out. I would put 2 bottles of Lucas engine oil treatment and run it until something happens then replace the engine. You might want to change the oil and filter and add a heavier weight oil.
Nov 16, 2024 at 10:05 AM
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IMTOOLER59
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I mentioned it came on suddenly. That's not the symptom of a worn-out motor. This answer is pretty generic.
Nov 22, 2024 at 2:52 PM
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STRAILER
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I didn't see where you said it came on suddenly, I apologize.
Nov 23, 2024 at 9:18 AM
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IMTOOLER59
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The apology is mine, I actually didn't say it came on suddenly, but it was kind of implied in my question.
Nov 23, 2024 at 1:08 PM
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STRAILER
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This engine has the cylinder delete which causes lighter issues which can be the problem with your engine is, you upload a short video of the engine making the noise I can tell for sure what's going on.
Nov 24, 2024 at 10:56 AM