Rod knock or something else???

[TruckMeRunnin]

Looking for opinions before I spend a boat load swapping

[Logan Lanfear]

I would probably say engine knock with a little of manifold leak also. Did the problem just come up or has it been getting progressively worse? Kinda hard to tell based off of just the sound.

[TruckMeRunnin]

Literally everything was fine Thursday. Fired it up Friday and boom knock knock

[Logan Lanfear]

What is the oil looking like? Did it ever run with no pressure? Pretty good indication that you might have spun a bearing and toasted it. Listening to it again it sounds a little too rough to be an exhaust leak. I noticed in the video it looked like the gauge or pressure sending unit was toasted so you probably don't have a way to read the actual pressure. I would assume the worst with rod knock.

[mookdoc6]

Bro,Bro....turn it off when it sounds like that! She needs to be opened up all the way top/bottom! Is it worth it $ that is what you have to decide sometimes it is others times it's time to move on....good luck! I have driven 305's like that and I want to say.........It drove for probably 20 miles before it finally seized....

 

Of note man that 305 took for ever to finally die....cornfields/train tracks/submerged you name it odometer stopped past 200K long before I owned it.......don't make em like they used too!

[1997SierraSLT]

I've had a stuck lifter and it's nowhere near that loud.