How do I properly torque the bolts?

[massimofinance]

I am rebuilding my 115HP Evinrude, and have to tighten the bolts for the Cylinder Head and the connecting rod cap. The book says 18-20 FT/LBS for the head, but when I set my torque wrench (automotive) to some place below 20 (it starts at 20) It is tight and I am careful to not blow the bolt out. (Do I need to buy a smaller torque wrench?) Is automtive and Marine torque wrenches the same? The book says I need to use special torque socket part No.: 331638, what exactly is that?<br /><br />Thanks MAX

 

[OBJ]

Re: How do I properly torque the bolts?

Max...you'll need to torque the head bolts in at least three stages and nothing less than two. I start at 10lb and go around, then 15 and then 20. Start at the middle head bolts and work outward in a clockwise pattern....counterclockwise is OK to... If you don't have the correct torque wrench, buy or borrow one....don't guess. <br /><br />Would the book be referring to the socket for the rod caps? If so, just pop into the auto parts store and get a 12 point socket of the size ya' need. Torque the caps like the head bolts...three stages.

 

[Trent]

Re: How do I properly torque the bolts?

For torque that low you will need an inch pound torque wrench. To convert 18 ft lbs to inch pounds multiply by 12.