Tappet blocks are directional (rear exhaust shown below).
2) 3)
86-90 engine sump splash holes 4) |
Rocker box drainage 12) |
91-03 breather holes in the rocker box sections and head 13) | ||
Head drains in the cylinders 18) 1 hole is plugged on each cylinder during installation. | Head drains at the cylinder base on the case 19) |
Milled slots in the left case match milled slots in the right case for rocker box drain from valve side. 20) | Lower part of slots in the right case exit thru drilled holes into the gearcase. 21) | |
Rocker box drains into the cam chest. 22) | |
Case drain / rifling hole for sump drain 25) | Rifling hole is on the back side of hole on the right. 26) |