Bshannon0890

I have a 5.3 that I put new rod bearings, main bearings, cam bearings, and piston rings In and I have a knocking sound that sounds like it's coming from the front of the motor I dropped the oil pan and could not find any issues with bearings expect for side to side movement no up and down. I found a scrape on windage tray at the back of engine but was not sure knock would come from this does anyone have a idea where this noise could be coming from?

Bshannon0890

https://youtu.be/of0Uxrv-Mhs

ahmed niaz

Pistons is loosen thats why that tik tak sound come when u accelerate when the engine is hot.
when u last time change ur car gaseket?

Che70velle

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G Atsma

Uhhh… yeah... wise move, Scott! lol

Ls7colorado

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LOL.............



Seriously though sounds like a piston pin, but who knows without tearing it down
Be sure to take the belt off and give it a quick start to see if it goes away (obviously dont drive it like that) Ive heard power steering pumps and Ac compressors sound similar to that too

turdnugget

Is it coming from the top or bottom? I had a rocker bolt come loose on me, and it made a nasty knock noise.

RIDETOEAT

Short video but sounds like top end pitch wise to me, deeper tones come from down low. To be fair it is impossible to know in a video but diagnose and fix it for sure. I got a 194000 mile 6.2 that has a little piston rattle when cold starting but quiets in a a couple minutes or a couple miles.

cam

iTrader: (9)

Sounds like it needs to come apart again unfortunately. Check all the specs by the numbers, something isnt happy

s30.hybrid

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00pooterSS

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Sounds like a rod bearing to me but it's always hard to say listening to a video and I'm in a loud shop too. When I listen for rod bearings I usually hold the idle up a little and lightly flare the throttle, real light, and the noise will go up and down with revs. Another way to see if it's a rod is disconnect one coil at a time and see if the noise stops, when it does you've found your cylinder with the bad bearing. Doesn't always work, but sometimes it does.

When you saw the mark on the windage tray, did you knock that part down or anything in case it's bent up and hitting?

MY_2K_Z

iTrader: (1)

I always change my car gaskets

TA_Freak

You got a part number for that .... and is it universal?

G Atsma

WHOA! You mean some AREN'T??? Ahhh MAAAAN....

8.Lug

All sorts of noises - the second before the video ended I heard a lifter tick, but just before that I heard rod knock. Make a longer video.

G Atsma

You guys all know you're dealing with something that happened over a year and a half ago, right? This thread only got revived by a troll post (#3)

Che70velle

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G Atsma

SOME did NOT...… lol

cam

iTrader: (9)

Hahaaa well OP what was it then, its been enough time to let us all know what it was?

s30.hybrid

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