What is causeing this knock? Video included inside.

[Wingnut87]

I just realized I posted this thread under the wrong section. I'm going to repost in the Gas/general section. Everyone, thanks for your input so far.

[Trippin]

Time to pull it and take a look. It is definitely mechanical, my guess is, you broke or lifted the top ring land and a piece is stuck in the top of the piston and is hitting the head.

[joecar]

I just realized I posted this thread under the wrong section. I'm going to repost in the Gas/general section. Everyone, thanks for your input so far.

Tom, I moved the thread for you.

[dfe1]

It's hard to tell from the video, but it sure sounds like it is a mechanical problem with the engine. There's a definite knocking sound that is not spark knock. This may or may not show up as spark when you data log. What do your logs show? Possible causes could be anything from a cracked piston to loose cam bolts. I'd start pulling the engine apart and looking for the cause before knock knock turns into boom boom.

[kbracing96]

I hate to say it, but I didn't even have to finish the vid to tell you what that sound is, you have a rod knocking and it wants out. It won't run long like that. Sorry man, it sucks, but I'd put a 50 dollor bill on it :(

[Dlong]

Sounds like a rod know to me. With a video it is hard to tell but generally a deeper sound is a rod, something more like a tick is generally valvetrain. I would pull the pan and start feeling the rods from the back to front. If it is wasted you will be able to feel it. I would still check the bearings even if you don't feel anything. Good Luck

[Chuck L.]

Tom, I moved the thread for you.

Moving the rest of the posts over??
TIA

[joecar]

Moving the rest of the posts over??
TIA

Chuck,

lol... sorry, oversight on my part, I have now moved those 2 posts, we're all on board now.

Joe

[Wingnut87]

Well, it seems everyone thinks it is a rod knock. I will start pulling the bottom apart this weekend (I should have been racing by now). My new question is this: Why did the car run great for a few days? It was in a yard for a few months. I got it running and was driving it in and out of the garage for a few months. Then I got everything sorted out and it was great for about three days. Then the knock started. I guess I'm wondering what caused it and how can I prevent it once I fix my engine? Oil pressure was good. Fuel was at 54psi, but the PCM seemed to compensate for it. The car was running very rich (64 psi) for a while when I was trouble shooting it.

[Highlander]

i would suggest removing the valve covers first... its super easy and the problem MIGHT be there.... its a lot simpler....

if the problem is not there keep going via the bottom...