Subaru Robin PKX201 - Manual (Page 35)

Centrifugal Pumps - PKX Service
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25. When reassembling the back plate to the engine make
sure the weep hole is facing towards the bottom of
frame. The weep hole is to prevent water from entering
the engine should a mechanical seal fail.
26. Install the pump back plate onto the engine. Install with
one bolt to hold its position.
28. The four bolts should be tightened snugly by hand.
Tighten diagonally to ensure even installation.
27. Place a small amount of thread lock sealer on the tip
of the bolts before reinstallation. This will prevent the
bolts from loosening.
Note: Only use Allen head bolts and special sealing
washers. Washers should fi t snug around the bolt.
Inspect for cracks in the sealing surface. Replace
with new if needed. Note: Threadlocker Blue®
from Permatex is recommended. It is medium
strength and service removable.