so i just bought a 1994 f350 crew cab long bed with the 351 previous owner said it started to knock he shut it off had it towed home let it set tried to start it and nothing but a loud hard thud it has some water in the oil and it looks like its trying to spin over im thinking it has water in the cylinder but im not going to be able to pull the plugs till this weekend what are the chances its not a head gasket and bad rod bearing please give me good news

 

well im going to pull the plugs in the morning

 

well i believe this motor is shot when i put water in the radiator it pours out the oil drain plug faster than i can pour it in

 

Sounds like a cracked block then. Sorry bud.

 

i found another motor from a 95 f15 im getting do these trucks use the same cam?

 

1994 and up should be roller cam. Your truck, being a changeover year, would need verified. Either has a billet distributor gear or cast gear. You can visually see the difference. Cast is aggressively and sharply machined. Billet is smoother. Cast gear is non roller.

 

you could pull lifter out, sometimes its hard to tell on gear look, guy just posted about his with pics

flat tappet lifter




roller cam lifter

 

Can also pull valve cover, loosen rocker arm, and check pushrod length. That would be the easiest method without disturbing the lower intake and having to reseal it.

Flat tappet are longer, roller lifters use a shorter pushrod.

Someone chime in if I got the lengths backwards.

 

flat tappet-8.1"
roller-7.5"

 

Thanks torq'ta!

 

Why would that matter? I wouldn’t be using anything from the dead engine except the wiring harness. Seems to me it would be a lot easier to swap out long blocks.