lower block assy?turn hard?

J

johnsplowing207

New Member

Mar 1, 2010

99

0

0

sanford maine

Apr 6, 2010

#1

• Apr 6, 2010

• #1

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?

 

M

mikepotts

Member

Jul 23, 2007

81

0

6

Apr 6, 2010

#2

• Apr 6, 2010

• #2

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

 

Tanus

New Member

Dec 11, 2009

847

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0

A to the Z

Apr 6, 2010

#3

• Apr 6, 2010

• #3

should spin pretty easy, definatly plastigauge it.

 

TenorPlayinGuy

Founding Member

Aug 3, 2001

1,208

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36

Canyon Country, Ca

Apr 6, 2010

#4

• Apr 6, 2010

• #4

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

This last 25% is foreign territory at this point

Founding Member

Nov 29, 1999

4,392

2,967

234

Indiana

Apr 6, 2010

#5

• Apr 6, 2010

• #5

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

 

P

powershift46

Founding Member

Apr 22, 2002

366

0

17

NW IA

Apr 6, 2010

#6

• Apr 6, 2010

• #6

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

New Member

Sep 7, 2003

116

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0

sturbridge,massachussets

Apr 6, 2010

#7

• Apr 6, 2010

• #7

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

New Member

Sep 7, 2003

116

0

0

sturbridge,massachussets

Apr 6, 2010

#8

• Apr 6, 2010

• #8

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

 

J

johnsplowing207

New Member

Mar 1, 2010

99

0

0

sanford maine

Apr 6, 2010

#9

• Apr 6, 2010

• #9

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

 

J

johnsplowing207

New Member

Mar 1, 2010

99

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0

sanford maine

Apr 6, 2010

#10

• Apr 6, 2010

• #10

and the heads are not on yet

 

TenorPlayinGuy

Founding Member

Aug 3, 2001

1,208

0

36

Canyon Country, Ca

Apr 6, 2010

#11

• Apr 6, 2010

• #11

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

 

Tanus

New Member

Dec 11, 2009

847

1

0

A to the Z

Apr 7, 2010

#12

• Apr 7, 2010

• #12

TenorPlayinGuy said:

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.

Click to expand...

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)

 

L

Lawbreaker5.0

Member

Feb 20, 2009

543

2

18

Texas

Apr 7, 2010

#13

• Apr 7, 2010

• #13

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.