Engine/Piston Knock 2000 Silverado Good or Bad!?! Help!!!

Colossus · April 18, 2018

On 4/16/2018 at 8:15 PM, TEWNCfarms said:

Yeah it’s definitely louder at cold start and goes away within 30 seconds, but this is all the time when I’m not driving fast.

Yup, it would happen cold or warm on my trucks. A good full synthetic oil and good quality oil filter sometimes help.

TEWNCfarms · April 18, 2018

10 hours ago, Colossus said:

Yup, it would happen cold or warm on my trucks. A good full synthetic oil and good quality oil filter sometimes help.

That’s what I’ve got... Mobil 1 high mileage 5w30 with extended perf Mobil 1 filter.

Colossus · April 19, 2018

you are in good shape then. You can try different oils though some noticed less knock with different brands.

TEWNCfarms · April 19, 2018

8 hours ago, Colossus said:

you are in good shape then. You can try different oils though some noticed less knock with different brands.

Okay cool good!

My knock does go away after I rev up to 1500rpm

Supreme Pizza · April 21, 2018

Just run it till it explodes. Once it blows up, buy a $100 junk yard motor, and pay someone $250 to install it.

TEWNCfarms · April 21, 2018

19 hours ago, starman8tdc said:

Just run it till it explodes. Once it blows up, buy a $100 junk yard motor, and pay someone $250 to install it.

Well hopefully it won’t blow up!

So I checked it out with the stethoscope and it definitely is coming from the front end of the block, not the power steering or flywheel. Hopefully it’s just because of this high mileage Mobil 1 and the pistons are slapping when idling, because like I said it doesn’t make the knock once i hit 1,500rpm.

Supreme Pizza · April 22, 2018

Might be worth checking your oil pressure with a gauge. A Seafoam flush on the top end might help if you have a carbon issue.

TEWNCfarms · April 22, 2018

7 hours ago, starman8tdc said:

Might be worth checking your oil pressure with a gauge. A Seafoam flush on the top end might help if you have a carbon issue.

Yeah I’ve done the oil sea foam once and the top end Flush twice... a few months ago and a month ago

Colossus · April 22, 2018

then you have yourself a very clean engine! Just drive it and be happy

Supreme Pizza · April 23, 2018

Ya, I wouldn't worry about it man. Just drive it and be happy - like Colo said.

Mike GMC · April 24, 2018

Could.it be a loose timing chain slapping the timing cover? Not sure exactly how to check this without pulling the timing cover though.

Maybe, it you had a valve cover off, you could turn the crank bolt slowly by hand back and forth about 10 degrees and see if there is any lag in the valve train moving when you change direction????

A tiny bit of lag is probably to be expected, but if it's significant, you may need a new chain.