MTU — Injector removal and installation
Repair & overhaul · Fuel injector
From a MTU operator's manual covering: 12V 2000 G23, 12V 2000 G43, 12V 2000 G63, 12V 2000 G83, 16V 2000 G23, 16V 2000 G43, 16V 2000 G63, 16V 2000 G83, 18V 2000 G63, 18V 2000 G83. Check it applies to your exact model before use.
Applies to: MTU 12V 2000 G43 engine, MTU 12V 2000 G83 engine, MTU 16V 2000 G43 engine, MTU 16V 2000 G83 engine, MTU 18V 2000 G83 engine
Before you start
- Fuels are combustible.
- Compressed air; do not direct jet at persons.
Procedure
- Remove cylinder head cover; drain fuel.
- Remove leak-off-fuel lines, fuel line, thrust screw, pull off pressure pipe neck.
- Extract fuel from exposed bores using suction device; seal connections with plugs.
- Remove screw and take off clamp.
- Screw extractor into injector; remove injector using impact extractor.
- Remove sealing ring using a self-made hook.
- Remove all plugs; clean sealing surfaces.
- Coat new sealing rings with petroleum jelly and fit onto injector.
- Press injector into cylinder head by hand; pin must be at 11-o'clock position and engaged in groove of clamp.
- Install clamp with screw; forked clamp end must engage in cover recess; tighten clamp screw to 50 Nm.
- Blow out fuel line and pressure pipe neck with compressed air.
- Coat new O-ring with petroleum jelly and fit; coat sealing cone with engine oil.
- Insert and press pressure pipe neck into cylinder head by hand.
- Tighten thrust screw to 40 Nm +/- 5 Nm; install fuel line, tighten union nuts; install leak-off-fuel lines.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Clamp screw 50 Nm
- Thrust screw 40 Nm +/- 5 Nm
- Union nut on injection pump 30 Nm +/- 5 Nm
- Union nut on pressure pipe neck 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.