Locked up?

[GreenMR]

Hey,I have a 99 ranger 3.0 flex fuel 2wd it started making this loud tapping noise from the valve cover area and i got it home i thought it was going to fly apart. Oil is full. I put some seafoam in it and started it a couple of days later,still making the loud tapping noise and then it just wentthump and quit. Won't even try to start when key turned on. What is it?

 

[GreenMR]

Truck has about 175k

 

[black_demon69]

from description it sounds like it seized. to confirm try turning crank by hand with a 1/2" drive breaker bar or ratchet and a socket.

 

[truckerdawg]

Pull the valve covers to check for broken rockers. Also could be a thrown rod or piston skirt broke and was wobbling creating the tap tap tap then boom a hole in the block.

 

[GreenMR]

what size socket do i need ?

 

[black_demon69]

what size socket do i need ?

don't know specifically but it is for the center bolt on the crank shaft..
usually pretty large.