HELP! Engine Knocking Noise 3800 Series II

[Eastahtata]

I know this is old but I've heard of flex plates cracking on this car. Easy inspection by opening the covers by the starter

[Tenkolazy]

that sounds like a piston or a piston part that is big not the crankshaft something is hitting the cylnder wall back n forth like its looose as fuck.but problably a piston connector thats to long.

[colinchandler696969]

no it is actuall a hollow crank shat that breaks in the engine

[XxzemogxX]

Dude had the same prob. It might be the crankshAFT BARRING

[tolerance775]

LMFAO i was like wtf it looks to different then my engine then i was like oh... mine has an s/c on top

[WWBZT1]

were you getting a MIL light on . should have a code for that cylinder not firing if it is the rocker stuck open or the push rod

[WWBZT1]

what is the upper intake manifold made of

[LimizukiStudios]

yep, sounds exactly like what happened after a mechanic broke one of the rocker arms in our engine (was stuck open and bent a little) while they were replacing the head gasket. the rod was just rattling around, not knowing what to do. They fixed that free of charge thank god because it WAS their fault in the first place

[aintnunbutapenut]

ohh yes that would be your ramrod :/

[ajpunisher666]

no oil 

[DisposableLifeForm]

Ha, now I see, you found the rod knock.

The harmonic balancer can come apart and the slapping balancer ring sounds like rod knock too. Easy to check, just try to move the ring. Might put some bearings in my LeSabre, still a great car.

[DisposableLifeForm]

This car is probably gone by now, but right at the end it sounded like a valve popping open. That would be a broken valve spring or rocker. A vacuum gauge would show a  fluctuation coinciding with the sound.

Could be a rod, my LeSabre lost a rod bearing at 180,000 mi.

[YourePrettyGoood]

sounds horrid

[lilbogle1991]

YOUR OIL PUMP IS GOING BAD IT IS NOT PUTTUIN ENOUGH OIL TO HEADS WITCH WILL WILL CAUSE THE ROD BEARINGS TO WHERE OUT AND CAUSE A KNOCK.ITS NOT THAT BAD NOW.DONT RUN IT ANY MORE PU;; THE OIL PAN OFF AND LOOK FOR SHAVINGS IN THE PAN AND THE ROD BEARINGS. AND IF THATS NOT IT THE IT IS YOUR LIFTERS..

[WWBZT1]

@lilbogle1991 i agree, it only does it under load, if it was something in the valve train it would constant and probably the MIL light on.

[stickit2damanleosis]

sounds like lifters, try taking off the alve covers and looking for a dead, or half dead rocker

[HDXFH]

Rod Knock, caused by either:, Redlining (Excessive revving, Lack of maintenence, E.G, Low on oil& also Because it was seized, so that means that the Rod / crank bearing would've spun, which damages the crank if you keep running it

[AWESOMEFULLNE55]

ended up being a rod knock.

[grandamle91]

Mines doing the same but alot more can't figure what it is

[1955mjf]

Did you find out what the noise in the engine was ? My Park Ave is doing the same thing.

[hartzellfever]

sounds like its your hydraulic lifters, but i would get more answers on this matter.