I am not sure but trying to diagnose a knock from my 305 tbi. After looking at the oil pan, it looks to me like the front is dented upward, can someone confirm this.

 

Looks like something hit the center link. It's bent too.

 

Somebody might have had a little incident with the k-member slipping off the jack pad.

 

exactly what I was thinking!

It probably required an underwear change.

 

Does it look likes it dented enough that it could be causing the crank to hit the pan?

 

Hard to say.

Usually when that happens you can see it... looks like it has a heartbeat.

 

I think what I will need to do is run the motor and feel for vibration in that area.

 

Month or so back I took delivery of my friends low mile minty fresh IROC-Z and underneath it you could eat off it aside from the boulder hit the engine cradle and oil pan took at some point. To the untrained eye one might think the engine cradle was made that way but the bottom of the oil pan is concaved in. Rest of car is perfect underneath. Oil pan is dry as a bone with not a drop of oil on the outside and the drain plug screws in and out just fine. Runs perfect with great oil pressure. It will be getting a new oil pan though and inspection of the oil tube and pickup housing/screen.

This is why I never want a car with an engine that has a cast oil pan. That would have been a blown engine for sure with a cast oil pan.