Quote:
Originally Posted by Va68goat
Sirrotica,
Thanks for the reply. Everything that you mentioned is pretty much way over my head but the friends that are helping me that live near me are watching this thread..so that helps. I think we are going to pull the converter back and see if the noise is still present. Since I have a new balanced flexplate, I assume we should just install it huh? I don't know if that's going to help or not but since I have it and its balanced, I assume we just install it. I went back and looked at the dyno video and I didn't hear it either. I don't know if it's because it was pretty loud at the time of dyno though, since I wasn't there. When the motor was installed and running, we heard the knocking sound. After many hours of diagnosis and replacing parts we decided it was best to pull the motor and take a look at the windage tray. We did notice only 1 washer was used to space the windage tray when normally Paul uses two washers. We did notice some witness marks on the windage tray so we added some spacing. I think the noise from the windage tray masked the knocking noise that we hear now.
TedRamAirII,
Unfortunately, I think we have some more testing to do. I certainly wish I knew more about cars to do this myself but I do trust the friends that are helping me. I have no clue about the clearance of the oil pump shaft and the camshaft You had good suggestions..thank you.
ponchjoe,
Hopefully we'll be able to work on the car and we'll take a look at what you mentioned.
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As long as you have the new balanced flexplate by all means install it. I really have little faith it's going to cure the noise though. I feel you're in the right area, but if the noise gets cured by changing the flexplate it would be some other issue other than a crack, such as too much run out touching something on the rear side of the engine.
I'm not sure if you've tried a stethoscope, or used a rod to listen for the noise, but it sometimes will point you in the right direction. One other thing I have used to listen to automotive noise is a 1/4 inch piece of vacuum hose placed in your ear, and moving the other end of the hose around to pinpoint a noise. This method is probably better for getting you in the area where the noise is loudest, than listening with a rod or a stethoscope.
Just thought of one more thing, the welded lugs on the torque convertor. I have seen an instance where the lug was fractured. The car was a race car, actually the middle picture in my signature, 67 GTO, so with open exhaust no telling if there was a noise or not. The lug actually finally pulled a section of the torque convertor out, and caused all the ATF to leak out and burn on the hot exhaust system. One of the tack welds on the lugs could have broken off and caused a noise from the movement. Not likely, but this isn't a common noise either.