Kohler KD27V12 — Fitting the injector and pressure adapter
Repair & overhaul · Fuel and injection system
For the Kohler KD27V12, from the Kohler service manual.
Applies to: Kohler KD27V12, Kohler KD27V12 engine
Before you start
- Leaks in the pressure adapter - the pressure adapter must be replaced after every removal.
- Leaks in the HP connections - the box nut must be replaced after every removal.
Procedure
- Fit a new O-ring onto the injector and grease with NBU 30.
- Replace gasket (symmetrical, no set installation side).
- Insert the injector with fitted support lug into the cylinder head and align.
- Press the injector into the cylinder head by hand.
- Insert the centering aid [10153847] into the bore of the pressure adapter.
- Exert a slight pressure on the end face to center the injector bore.
- Fit the spherical washer, oil the socket head screw and tighten (5 Nm).
- Remove the centering aid.
- Grease a new O-ring for the pressure adapter with NBU 30.
- Install the pressure adapter so the centering lugs are flush with the recesses in the cylinder head.
- Tighten the box nut (5 Nm) then the socket head screw (28 Nm) then the box nut (35 Nm).
- Connect cable to injector.
Tools required
- Centering aid [10153847] Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Socket head screw M8x50-10.9: 5 Nm, 28 Nm
- Box nut M24x1.5: 5 Nm, 35 Nm
Full service-parts list: Kohler KD27V12 →
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.