Valve train noise I would guess. Remove the valve covers and inpect.

 

do you say that because of the tempo? It does seem to be softening a little after fresh oil change.

I did never ever find the electrode of the broken spark plug, wondering if that is fouling it up.

its definitely the loudest with the stethoscope on the cylinder with the broken plug

 

You need to borescope that cylinder.

 

I did borescope the cylinder and ran the magnet tip on it and came up with nothing, I couldn’t get a good image of the valves but I’ll try again.

Going to pull the valve cover today and I’ll post what I find

 

It doesn't sound like a rod bearing knock to me and I've heard a few on older engines. It sounds like valve train noise.

 

Sounds just like my son in law's truck. It's the cam followers (lifters). Bearings would have a deeper sounding clunking, not clattering.

Wouldn't be surprised if the engine is all sludged up. How much maintenance history do you have? Infrequent oil changes will do it.

Pull the cam covers and inspect the valvetrain.

 

My grandfather bought it new and drove it to the dump and back for 10 years, still had the original tires when I got it.
With about 30,000
i wouldn’t say I’m diligent on maintenance but I only really drive it in the winter or when I need it and put about 6,000 -10,000 miles on it a year and use synthetic and change the oil maybe 1 or twice a year. I never did use motorcraft filter until now. It’s kind of a rust bucket that has spent 80 %+ of its
life sitting.

 

If it's a rod knocking, then you won't hear it unless the motor is actually running. The cylinder FIRING drives the rod the other direction and if the bearing is loose then the rod will slam to the other side and make noise. If the cylinder isn't firing then the crank shaft PULLS the rod and it stays tight against bearing and doesn't knock.

A GOOD mechanic can listen to the engine and can tell you which bearing it is based on the location of the source of the sound.

 

i was away for a couple weeks and just got back to this and here is what I found when taking the valve cover off, the spring is actually 2 springs

 

So it dropped a valve? Head needs to come off.

 

Yeah dropped a valve, I’ll have to get into it this weekend, thanks for all the help

 

Thanks for letting us know. And keep us updated.

 

After looking at the spring, I thought it was a double spring but it is just a spring broke in 2, I guess this is what caused the valve to drop, maybe I’ll get lucky and the valve will just be popping up and down making the knock

 

I'd anticipate piston damage. Hopefully the rod isn't bent, and the crankshaft and bearings are okay.

 

And the cylinder isn't scored?