Logo

Torque Pattern for 20 Bolts on Water Jacket BF 130

stan101

Member
This Water Jacket Cover requires 20 bolts tightened in what pattern? Top to bottom, center to ends, staggered? In addition, the water jacket cover system includes a Relief Valve Cover that is a different thickness and not all bolts passing through it mount to the engine: some bolt to the water jacket cover itself. So the tightening pattern on this configuation has a lot of possibilities, but there is probably only one right answer. Does anyone have the answer to this?
 

Attachments

  • IMG_0513.JPG
    IMG_0513.JPG
    55.4 KB · Views: 87
There is not specific torque pattern that I know of. Just do a circular pattern starting from the inside working out.

Mike
 
Yes, something long like this will fair well if you start in the center and work your way in even increments, to the right and to the left, out to each end. Do this in several passes using increasing amounts of torque until you reach the nominal setting.

If you were to start at the edges and at one end, the casting will tend to "bow up" and warp.

If you were to start at each end and work your way to the center, the casting will tend to "hump" up in the middle.

You would probably get away with any "pattern" as long as you did it in small steps up in torque value. But from the middle out is the best method.
 
Back
Top