Not Enough Clearance?

[MustangManiac]

How much lb ft. should it take to turn over a crank by hand?

[Dustball]

The fresh 460 I did a few weeks ago was about 30 ft/lbs my best guess. I was able to turn it with a standard 1/2" ratchet, maybe 10" long?

[Old Man]

How much lb ft. should it take to turn over a crank by hand?

Just the crank, or assembled short block? Assembled short block should be about 20-25 lbs for a small block, 25-30 lbs for a big block.

The real question is how much clearance do you have?

[gutlas5]

spin it fast enough and it'll self clearence lol

[mustang cobra93]

spin it fast enough and it'll self clearence lol

[MustangManiac]

It's a complete 351W. Seems like when we try to start it, it wants to start but it can't. It'll crank over and almost start but it won't. We can't turn it over by hand. Any suggestions? I think we might have to completely tear it apart again.

[Stormwalker]

spin it fast enough and it'll self clearence lol

[Old Man]

It's a complete 351W. Seems like when we try to start it, it wants to start but it can't. It'll crank over and almost start but it won't. We can't turn it over by hand. Any suggestions? I think we might have to completely tear it apart again.

Are you are trying to turn it over by hand with the spark plugs in? If so it will be very hard to impossible.

If it cranks, but wont start, you need to check for fuel, stark, and cam/ignition timing.

[allstock93gt]

if you cant crank it over buy hand with the plugs out its time to start over!

[MustangManiac]

we figured it out. This is our first engine build so I didn't know we had to adjust the valves. We did that and now it turns over and runs.