I have an ls 6.0 from an 2005 chevy Silverado 2500 hd. Took it to the shop and they said it needed a new crank, so they put the crank it. The flywheel is the same from the original motor

I may've read some bad info when I was doing my research on flywheel and spacers for my 6.0 to sm465 conversion. Now I'm back tracking a little to save future headaches.

How far does the flywheel sit from the back of the block with the long crankshaft/spacer installed? I don't remember if the new crankshaft protruded or not when I mounted everything up.

If there's a distance, that would be amazing, since the motor and tranny are already in the vehicle.

Thank you

Double

 

If it's a 2005 engine, it should have the short crankshaft.
They only used that extended flange crankshaft for a couple of years when the LS engines were first introduced in the trucks, in order to be compatible with the transmissions that they had available at the time.

Also, if I'm not mistaken, all of those long crank engines had iron heads.

 

Yea you're 100% right.

The gentleman who redid my motor started asking about what type of transmission I'm putting the motor in front of, for the pilot bushing. Then we found out that the crank had to be replaced, so I dont know if he had a long crank put in or the stock short. I'm going to call him tomorrow to find out, but for piece of mind for something I could check out this weekend, I didn't know what the block to flywheel distance would be from a short crank to a long crank ya know.

 

.400 longer on the old style crank.

 

Right @cookseyb, I just didn't know what the distance from the back of the block to the inner face( pointing to the block) was for the long crank. As I didn't take a picture of the crank flange before I mounted everything together and started second guessing stuff because brain is dumb sometimes lol.

 

Are you just trying to determine if you have the long crank or not? IIRC you should be able to decode the casting number on the crank. Should be easy enough to do if the oil pan is off.

12552215= long (or wide depending on who you ask)
12552216= std (or narrow...)

 

Yes sir you're 100% correct too. The original crank was a short crank, but the new crank that was installed is, well I don't know.

Sorry for the mishap, but the motor and transmission are installed already in the vechile and bolted down. So that's why I wanted to know the block to flywheel distance to double check the calculations.

 

If everything bolted up it should be OK. If a long crank went in things would not fit correctly.