Thread: I think I'm in big trouble, knocking sound from engine....

Driving home today and just before I got home I had to pass someone and when doing so I heard a knocking noise come from the engine.

Got home popped the hood and heard this knocking noise coming from the engine, seems louder on the passenger side near the pulleys.

http://s1127.photobucket.com/user/th...ofmi3.mp4.html

http://s1127.photobucket.com/user/th...sxyik.mp4.html

Hooked up my phone with Torque to check for KR, not sure if that means anything but i have 0 KR like usual.

Let it sit for awhile, started it back up and if anything its louder. Sounds like "rod knock" or something serious.

So......am I fuuKed?

That's what I'm thinking. I've heard that same exact noise from 2 different 3800's and both ended poorly.

And I'm assuming if it is rod bearings its new motor time. Not worth it to try to replace correct?

Sounds like you get to play the motor swap game, at least you can go SC now.

Sent from the Milky Way

This is rod knock.

just for sh*t and grins look at the balancer and see if the rubber has ripped had that problem on my gtp and I thought the motor let go

Originally Posted by 00grandprixgtp

just for sh*t and grins look at the balancer and see if the rubber has ripped had that problem on my gtp and I thought the motor let go

This, you don't really hear it till you rev the engine.

Originally Posted by 00grandprixgtp

just for sh*t and grins look at the balancer and see if the rubber has ripped had that problem on my gtp and I thought the motor let go

Not exactly sure what I'm looking for, can you elaborate?

Possible flexplate? Just because its not super constant like the video slick posted

Sent from the Milky Way

And if it was the flex plate how could I tell that it was bad?

Look at the harmonic balancer, if the rubber is ripped/torn it will make a noise like someone sticking a wooden spoon in a box fan.
Jack up car remove dust cover and visually inspect the flexplate from under the car.

I'll have to check it tomorrow, no time left today. Thanks for the help so far today, I have another video I'll post in a bit here.

when my hb went I was in boost and it sounded like a rod let go even took the belts off and still rattled but mine seemed to go away when u got into full boost because it would lock into place I though forsure when I heard it the motor was done looked in the wheel and found balancer.jpg

That happened to my 97, though I blew up my engine.

169k miles. What really sucks is I took VERY good care of it and is otherwise in perfect condition (minus a few dings you know).

Literally everything works on it, tranny shifts perfectly and so on.

its time to give one up for the gipper it seems.

get him a new power plant. if you drive or run it longer it will sound like slicks vid.

check all the other things listed too. all relevant.

but it does sound like a rod bearing to me too.

Ok not starting it anymore, although I think I have confirmed my fears. I checked the dipstick and found some sparkles in it. Not a ton, but enough to notice.