Logo
FULL SITE MENU

torque speck qustion

4

48tony

Regular Contributor
Hi all,After looking in my manule on the torque specks I am in qustion as to why there is such a wide difference in the specks. I have the tourqe wrench that is for in lbs not ft lbs.The book states head bolts to be torqued at 168-192 in.lbs.(14-16)ft. lbs .crankcase to cylinder bolts upper center lower (144-168) in. lbs.Connecting rod cap bolts(348-372) in. lbs.(29-31) ft. lbs.Why such the wide difference in the in lbs vs ft lbs?Again I have the in lbs wrench so what do i set it at? Can someone please help me out. thanks tony
 
The differences are given so that you can apply whatever torque is needed depending on what torque wrench you have. If you have a "Inch Pound" torque wrench, use the "Inch Pound" torque figure.

Inch pounds is simply the 1 foot pound figure multiplied by the 12 inch figure (14'x12"'=168"...... 16'x12"'=192")
 
Last edited:
Torque is a crude measurement to do with tightening ( resistance to turning ) of fasteners.--------------------------Factors governing it are the condition of the threads / lubrication used / gaskets being squeezed / whether there is a hardened or soft washer under the head of the bolt / calibration of the wrench itself / ETC ETC !!--------------------High tech measurement can be done using ultrasonic means , measuring the stretch of the fastener,and heating the fastener and then turning a number of degrees according to a chart. ETC , ETC.-----------.
 
Thank, you both for the info.As you both allways have deep insite on problems listed on this site.And have given away years of learned experience witch is hard to find in this field of fun.It seems nothing for nothing in this world.It seems to me when i go to a marina it is hard to find good info.Most of the time they just tell ya drop it off and we will take a look at it .And then the BILL ouch.So just to say a headsup i am greatfull and thankfull.Tony
 
Back
Top