lower block assy?turn hard?

[johnsplowing207]

just assembled my lower end with a reground 10-10 crank,recondicioned rods,new bearings(rods and main)new std pistons and new moly rings.oiled every part before installed.should the crank turn over hard or easy?

 

[mikepotts]

should be easy! especially before the rods and pistons are installed, should spin by hand freely.

 

[Tanus]

should spin pretty easy, definatly plastigauge it.

 

[TenorPlayinGuy]

PlastiGAUGE! Use a micrometer and do it right. Especially on a rebuild. If you just want to see if your bearings are still... Ok... after 60k miles then ok... use plastiguage. But for a new build use a mic to check true diameters.

 

[tannerc91gt]

if you have assembled your shortblock correctly, it should rotate with very little resistance.

 

[powershift46]

Sounds like a fully assembled short block by the description, should turn a little hard then. Not sure the exact lb/ft though.

 

[silver1983gt5.0]

i dont remember the exact ft/lb but i just rebuilt mine and someone on here told me 25 lbs should spin it. not for nothing but i had an issue with mine spun fine until i had all the mains torqued down come to find out i had a bur on the #1 main i dont know how to link threads but if you search mine i got some great tips and help from some great people on here

 

[silver1983gt5.0]

just checked and was told 25 - 29 ft lbs on a short block assembly

 

[johnsplowing207]

spun with my hand on just the crank,after I installed the rods and pistons I spun it with a crowbar where the fly wheel is.after the first 2 complete turns it started turning easier.but then I stopped

 

[johnsplowing207]

and the heads are not on yet

 

[TenorPlayinGuy]

once there is compression, it will be harder for sure.

 

[Tanus]

PlastiGAUGE! Use a micrometer and do it right. Especially on a rebuild. If you just want to see if your bearings are still... Ok... after 60k miles then ok... use plastiguage. But for a new build use a mic to check true diameters.

YES!! plastigauge, it costs 5 bucks, is accurate enough for a regular rebuild and its easy to do. measuring it with a mic requires a set of mics ($$$) and is not that easy to do (yes it's only taking measurments and adding and subtrackting to figure clearances, but its not easy if you dont know what your doing)

 

[Lawbreaker5.0]

Why are you using a crowbar? Put a 15/16 socket on a wrench and turn it. With new rings it's gonna be hard to turn.