spun MAIN bearing sound - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

zz430camaro · 07-25-2025, 04:14 PM

What does a spun main bearing typically sound like? I am getting a strange sound coming from my cammed LS3, not a knock and its only at idle, starting to think its a lifter wheel or a bearing going bad.

zz430camaro · 07-25-2025, 05:08 PM

Well, i pulled the oil filter and cut it apart and found some metal particles in it, not alot but they were there. Its eating a lifter or a bearing, first thing is to pull the heads and see if a lifter wheel is coming apart, hopefully I caught it in time and did not screw up the engine too bad. Still has perfect oil pressure and no knocking just a weird humming noise at idle.

joshnmn · 07-25-2025, 10:47 PM

Our damaged lifter made a weird noise too. Hard to describe but definitely caused it to run poorly and throw codes. Is yours running fine?

zz430camaro · 07-26-2025, 01:48 AM

Ya runs fine, just makes a weird noise, sucks

bsn · 07-26-2025, 06:48 AM

A bearing generally doesn't make any noise except for a knock, my money is on a lifter.

zz430camaro · 07-26-2025, 09:08 AM

Lets hope, maybe I can get away with a new cam and lifters

1JEWLDSSRS · 07-28-2025, 06:08 PM

Quote:

Originally Posted by zz430camaro

Lets hope, maybe I can get away with a new cam and lifters

Good luck, hope that's all it is...

07-25-2025, 04:14 PM	#1
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,498	spun MAIN bearing sound What does a spun main bearing typically sound like? I am getting a strange sound coming from my cammed LS3, not a knock and its only at idle, starting to think its a lifter wheel or a bearing going bad. __________________ 2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ

07-25-2025, 05:08 PM	#2
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,498	Well, i pulled the oil filter and cut it apart and found some metal particles in it, not alot but they were there. Its eating a lifter or a bearing, first thing is to pull the heads and see if a lifter wheel is coming apart, hopefully I caught it in time and did not screw up the engine too bad. Still has perfect oil pressure and no knocking just a weird humming noise at idle. __________________ 2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ Last edited by zz430camaro; 07-25-2025 at 06:10 PM.

07-26-2025, 01:48 AM	#4
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,498	Ya runs fine, just makes a weird noise, sucks __________________ 2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ

07-26-2025, 09:08 AM	#6
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,498	Lets hope, maybe I can get away with a new cam and lifters __________________ 2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ

07-25-2025, 10:47 PM	#3
joshnmn 2&THEHIT Drives: 5th Gen Camaro; 5th Gen Ram 3500 Join Date: Mar 2018 Location: Garner, NC Posts: 1,103 View My Garage	Our damaged lifter made a weird noise too. Hard to describe but definitely caused it to run poorly and throw codes. Is yours running fine?

07-26-2025, 06:48 AM	#5
bsn Drives: 2013 ZL1 Join Date: Sep 2021 Location: Virginia Posts: 469	A bearing generally doesn't make any noise except for a knock, my money is on a lifter.