MTU — Injector installation
Repair & overhaul · Fuel system (high pressure)
From a MTU operator's manual covering: 12V 2000 G22, 12V 2000 G42, 12V 2000 G62, 12V 2000 G82, 16V 2000 G22, 16V 2000 G42, 16V 2000 G62, 16V 2000 G82, 18V 2000 G62, 18V 2000 G82. Check it applies to your exact model before use.
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Before you start
- Fuels are combustible – avoid open flames, sparks and smoking
- Check fuel system for leaks during engine operation
Procedure
- Bar engine several times with starter to blow out remaining fuel.
- Clean sealing surfaces on cylinder head and injector retainer.
- Coat new sealing rings with petroleum jelly and fit on injector.
- Press injector into cylinder head by hand, pin at 11 o'clock.
- Install clamping element with hex screw, tighten to 50 Nm.
- Fit O-ring on pressure pipe connection and insert into cylinder head.
- Tighten thrust screw to 40 Nm + 5 Nm.
- Install injection line and fuel return line; install cylinder head cover and vent fuel system.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Injector clamping screw 50 Nm
- Thrust screw 40 Nm + 5 Nm
- Union nut on injection pump 30 Nm + 5 Nm
- Union nut on pressure pipe joint 20 Nm + 5 Nm
Source: MTU operator's 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.