Piston slap

[mikeyss]

Thank you, and I'm sorry my video does kinda suck hearing it. I will pop the hood this weekend and get a video. I am leaning towards this being valve train/lifter noise. It runs strong, and idles smooth. I should get the drivers side rear manifold bolt fixed, that also could be what I'm hearing.

The noise I'm hearing is kind of like yours, not as bad though.

 

[Derick]

I should get the drivers side rear manifold bolt fixed, that also could be what I'm hearing.

The noise I'm hearing is kind of like yours, not as bad though.

That certainly could be it. More revs = more vibration of the motor and if the manifolds aren't properly secured to the motor, well you can get all sorts of noise. I had to have new manifolds put on last year, and had at least 2 broken studs.

 

[mikeyss]

I was finally able to get another video of the noise that made me start this thread. I am leaning towards the noise being a bad lifter. If that's the case, I guess I'll just have to replace the lifters and upgrade to a BTR cam

 

[Kraig]

While you have the heads off for the cam swap, replace that broken exhaust stud and I bet the noise isn’t there when you put it back together.

 

[mikeyss]

The broken bolt is on the driver's side rear, and surprisingly there is a very small amount of soot around it. It just looks like normal dirt. The noise is coming from the passenger side. I may rob my exhaust clamp thing from my 05 Tahoe (it also has the same broken bolt) and clamp it on to see if the noise changes. I am waiting to get that broken bolt out for when I get ARH longtubes.

 

[Derick]

Sooooooooooooo, take off the torque converter cover and see if it gets louder. That sounds exactly like mine did as my torque converter starting to kick it. Do you get a weird vibration/noise inside at high rev shifts?

 

[mikeyss]

Sooooooooooooo, take off the torque converter cover and see if it gets louder. That sounds exactly like mine did as my torque converter starting to kick it. Do you get a weird vibration/noise inside at high rev shifts?

I haven't noticed any vibrations, but it does sound like the noise is in the torque converter area. I'm going to pop off the cover and check the noise, as well as make sure the flywheel is ok. It just started doing this not too long ago, and it also feels like I have a U-Joint going out. When I press the gas, there is a weird binding type feel, it feels like a bad u-joint but maybe it is torque converter related.