i have a 305 to put back into my 84 ta its the original 5.0 h.o. l69 i have never heard the engine run but the symptom is a knock suspect is a rod bearing thou i dont know which piston ??? i have the pan down and am gutting the block any advice on how to tell which bearing it might be ? should i look for scarring on the cam shaft the bearing being bent or scarred or misshaped??? advice is needed here gentlemen i have never torn down an engine this far and i am way over my head at 21 i dont have buddys to show me the way please shine a light on my situation for the love of my bird !!!!

 

You should be able to grab the rods by hand, if a bearring has excessive play you should be able to feel it, then remove the caps and check the bearrings and crank for damage

 

okay i was under there before work tonight and i seen the piston bottoms they have bolts in them undo those bolts and take the "caps" off then feel for the loose one it wont be much from what i understand but it will have play check the surrounding area for scarring and thats the one to replace if it is smooth will i be okay with replacing it or if i do that will it just spin out again ? and if it is not smooth it needs mechined and oversized bearings right ?

 

what does this cap look like post a pic if you could please im trying to understand this im doing this myself for the first time

 

I will not be home until tomorrow night. You want to check for play before removing the caps. try moving the rods from side to side and tp to bottom, try them all and see if any feel different.

 

Here is a quick pic, this should help!