engine noise

[3.8 LA LEY]

Any idea what this could be ? Sounds expensive

I can tell you its not the converter bolts.. just finished checking them.

 

[mblum]

Sounds valvetrain related. For starters pull the valve covers and look for loose/broken rocker arms, anything that might be loose or out of place.

 

[BEATAV8]

Yeah sounds expensive. Oil pressure getting lower over time?

 

[Nigel]

Hard to tell from a recording, but unless you can definitely tell where it is coming from I would take the accessory belt off and start it just to rule a bad accessory or rattling belt tensioner. Then start looking internal.

 

[Chuck Leeper]

Details on the engine?
Balancer loose?
Converter bolts tite and the flex plate loose or cracked?
Oil filter cut and inspected?
SM readings, data logs?
Plugs look like?

 

[HighMileage]

Any idea what this could be ? Sounds expensive

I can tell you its not the converter bolts.. just finished checking them.

What’s the oil pressure?

 

[Eds87GN]

I thought I had big troubles deep in my motor and when I started the disassembly I noticed a witness mark inside the driver's side valve cover where a rocker arm was lightly tapping it.
A slight adjustment of the valve cover is all it needed!

If it were mine, what Nigel said above is where I would start.

Ed

 

[3.8 LA LEY]

all the rockers are tight, I'm thinking I might of cracked my flexplate. have to lift it up and do some digging

 

[GNVYUS 1]

Keep Lifters in mind in case you get deep into things and nothing shows up, it almost sounds like a few are possibly not pumping up under load.

 

[3.8 LA LEY]

almost positive I spun a main bearing....

oh well stroker kit here I come

what's weird is that I wasn't beating on it or anything just some pulls here and there

Now the real question is if i do a Stroker do I leave my 6266 or upgrade to a 6466 probably need to swap out converter too

 

[mblum]

What leads you to believe you spun a main bearing?

Oil pressure loss?

Did you cut the oil filter open and look for bearing debris?