Dsheps

So I used about a 1/4 of a can of seafoam spray through the intake on a warm engine while revving at 1500-2k, I didn't spray in one go, sat for 15mins before tuning her over and burning carbon off. Took her on the freeway for 10mins 60-70mph 3000rpms, came off the freeway and heard this knocking sound, my first guess is carbon deposit stuck in the chamber but I tried driving a bit more hoping it would eventually burn off, knocking became louder as I go up in rpms and longer the engine is running, no loss in power, used a stethoscope over the valve covers, sounds like a woodpecker even sound throughout, checked underneath on the oil pan, sound was more faint. Anyone have any ideas?

NC01TA

With the engine warmed up that doesn't sound very good. Thanks for the audio. Many of us get the cold engine sounds but they go away when the engine is warmed up. Sorry to hear this noise but maybe someone will chime in with helpful info. Interesting that it started with the Seafoam.

the_merv

iTrader: (88)

That high of RPM on the freeway for that long may have spun a Rod, or it's a Lifter messed up which is not good either.

Pull the Valve Covers and look at the Rockers, if you're lucky one came loose. If all look good check to see if any have excessive play up and down.

01CamaroSSTx

iTrader: (3)

Knock Knock Knocking on heavens door.

I wouldn't keep running it as that sounds like rod knock but it might be a stuck valve that ended up smacking a piston..Have you drained the oil and inspected the oil and filter for any signs of what looks like glitter/bearing material? Wouldn't be a bad idea to have the oil sent off for analysis. Pull the valve covers and inspect and maybe even rent a borescope to look into the cylinders.

strutaeng

Oh Man, that doesn't sound too good. I also vote for draining, inspecting the oil and cutting open the oil filter.

the_merv

iTrader: (88)

I opt for pulling the Valve Covers, because you can see what the Valve Train looks like as well as glitter in the oil.

Dsheps

I appreciate the responses, pulling the covers tomorrow. I'll update as I go along

Dsheps

So I've hit snag. The coil pack mounting bracket is a PIA I got the first bolt but the second is loose but is too long and hits the firewall

NC01TA

^^ Sorry man. I hope someone can assist with this...

the_merv

iTrader: (88)

V6 car? I don't think it was ever mentioned.

Dsheps

Yes v6

the_merv

iTrader: (88)

Never worked on them just did the V8 stuff. One would hope you don't have to drop the K-member to remove the coils..

Withers

This doesn’t look good mate, hope you get the help required

Dsheps

Sorry I've been too busy but the update is not good news, one of the connecting rod bearings got loose and completely welded itself to the bottom connector. So now I will be dropping the engine and trans and while I'm at it will be doing a complete rebuild. Deep cleaning the block and all new gaskets since I'll finally be able to get to the oil pan lol.

the_merv

iTrader: (88)

They do that, what we thought it would be.

01CamaroSSTx

iTrader: (3)

Perfect time for an LS engine and tranny swap that is if you had everything else that's needed to make that swap I'm curios if anyone's swapped a V8 in these cars and kept the drive by wire setup the V6 4th Gen cars had?