LS3 motor knocks getting louder
Thread Starter
TECH Enthusiast
Joined: Jul 2010
Posts: 593
Likes: 29
From: Florida
TECH Fanatic
Joined: Jan 2009
Posts: 1,063
Likes: 475
From: Bostwick, GA.
"Headers had a small leak, possible sucking air back into the chamber. All the carbon on the pistons and heads may do it also".
1. The header leaks will mess with the O2 readings.
2. The piston tops show a very inconsistent carbon pattern with the center two on both banks washed and the outers on both banks with heavy carbon build.
How were the injectors cleaned?
If it was my engine, it would be on an engine stand and completely disassembled and inspected.
1. The header leaks will mess with the O2 readings.
2. The piston tops show a very inconsistent carbon pattern with the center two on both banks washed and the outers on both banks with heavy carbon build.
How were the injectors cleaned?
If it was my engine, it would be on an engine stand and completely disassembled and inspected.
Thread Starter
TECH Enthusiast
Joined: Jul 2010
Posts: 593
Likes: 29
From: Florida
"Headers had a small leak, possible sucking air back into the chamber. All the carbon on the pistons and heads may do it also".
1. The header leaks will mess with the O2 readings.
2. The piston tops show a very inconsistent carbon pattern with the center two on both banks washed and the outers on both banks with heavy carbon build.
How were the injectors cleaned?
If it was my engine, it would be on an engine stand and completely disassembled and inspected.
1. The header leaks will mess with the O2 readings.
2. The piston tops show a very inconsistent carbon pattern with the center two on both banks washed and the outers on both banks with heavy carbon build.
How were the injectors cleaned?
If it was my engine, it would be on an engine stand and completely disassembled and inspected.
TECH Fanatic
Joined: Jan 2009
Posts: 1,063
Likes: 475
From: Bostwick, GA.
And it still knocked.
All those kits do is dissolve the crap already in the filter baskets and push it into the nozzle.
That still doesn't account for the messed up piston tops, heads, and who knows what else.
Just because the inj squirts, it doesn't mean they are remotely close in flow volume.
All those kits do is dissolve the crap already in the filter baskets and push it into the nozzle.
That still doesn't account for the messed up piston tops, heads, and who knows what else.
Just because the inj squirts, it doesn't mean they are remotely close in flow volume.
Thread Starter
TECH Enthusiast
Joined: Jul 2010
Posts: 593
Likes: 29
From: Florida
And it still knocked.
All those kits do is dissolve the crap already in the filter baskets and push it into the nozzle.
That still doesn't account for the messed up piston tops, heads, and who knows what else.
Just because the inj squirts, it doesn't mean they are remotely close in flow volume.
All those kits do is dissolve the crap already in the filter baskets and push it into the nozzle.
That still doesn't account for the messed up piston tops, heads, and who knows what else.
Just because the inj squirts, it doesn't mean they are remotely close in flow volume.
Joined: Apr 2006
Posts: 3,890
Likes: 1,137
From: Grand Rapids, Michigan
I came up with a way to flow injectors backwards to clean them. Works pretty well. Got an injector tester tool off Amazon for $30, which pulses the injectors in short bursts or steady state. Hooked up a Mityvac to the inlet side of the injector, then stuck the injector in a bowl of cleaner. Pulled 20" on it and turned on the tester. Flowed backwards quite well, bringing quite a bit of crud with the cleaner.
What I heard in the video just sounded like the injector solenoids clicking, which is normal.
also if the engine has been sitting so long it could have a sticky lifter or 2 that might have went away after a couple heat cycles.
also if the engine has been sitting so long it could have a sticky lifter or 2 that might have went away after a couple heat cycles.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
