When someone says the rod is knocking what is wrong with the engine? Maybe a stupid question but i was curious.

 

The term "rod knocking" usually implies that a rod bearing has spuninside the rod. The bearings are supposed to stay in place on the connecting rod (the rod that connects the piston to the crankshaft), but they can, under severe conditions, spin inside the rod and when that happensitdestroys the bearing and produces a knocking sound. It could really mean any failure that is rod-related though, like a wrist pin(the pin that attatches the rod to the piston) breaking, or even the rod breaking itself, in these instances the rod or a portion ofit willstill be turning with the crankshaft, and it will"knock" against the cylinder wall and destroy it.

 

I have a 305 w/91k on itlaying around that i pulled out of a firebird. Thats why i asked cause thats whats wrong with it.I may try to fix it myself but i have never done that before.Do you know what a shop will charge to fix that problem. Thanks..