Detroit Diesel — Fuel Injector Nozzle Installation
Installation
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Do not tighten the thrust bolt until the tensioning arm has been fully tightened to the correct torque value.
Procedure
- Measure the length of the tensioning arm M10 retaining bolt with a dial caliper (new 90.0 mm, max 91.0 mm).
- Lubricate a new nozzle O-ring with engine oil and install it on the nozzle.
- Using heat isolator installer J-46384, press the new heat isolator onto the nozzle.
- Install the nozzle in the cylinder head; align the notch in the tensioning arm with the pin on top of the nozzle.
- Install the retaining bolt in the tensioning arm; tighten to 50 N·m (37 lb·ft).
- Lubricate a new transfer-tube O-ring with engine oil and install it on the transfer tube.
- Install the transfer tube in the cylinder head; tighten the thrust bolt to 45 N·m (33 lb·ft).
- Install the injector line (refer to 2.3.2).
- Install the charge-air manifold (refer to 6.1.2).
- Install the cylinder head cover(s) as removed (refer to 1.1.2).
- Install the engine trim covers.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tensioning arm retaining bolt: 50 N·m (37 lb·ft)
- Thrust bolt: 45 N·m (33 lb·ft)
- Bolt shaft length new: 90.0 mm (3.54 in.)
- Bolt shaft length maximum: 91.0 mm (3.58 in.)
Source: Detroit Diesel 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.