Tech Tips
Perform "Inspection After Repairs" after replacing the fuel injector assembly.
w/ EGR System Click here
w/o EGR System Click here
INSTALL FUEL INJECTOR SEAL
| *a | Area to be Cleaned |
Apply engine conditioner to the area shown in the illustration. Using a piece of cloth, clean carbon deposits from the fuel injector set and its grooves.
Note
Do not clean the tip of the fuel injector set.
Do not use a wire brush to clean the fuel injector set.
If a fuel injector set is dropped or the tip of a fuel injector set is struck, replace it with a new one.
| *a | Tapered Inner Portion |
| *b | SST (Guide) |
Apply engine oil to the fuel injector set contact surface of SST (guide). Then attach SST (guide) to the fuel injector set with the chamfer facing the tip of the fuel injector set as shown in the illustration.
| *1 | Fuel Injector Seal |
| *a | CORRECT |
| *b | INCORRECT |
| *c | SST (Holder) |
Install a new fuel injector seal to SST (holder).
Note
Be careful not to install the fuel injector seal to SST (holder) at an angle. Doing so will stretch the fuel injector seal and correcting this problem is very complicated.
| *a | SST (Holder) |
| *b | SST (Guide) |
Install SST (holder) with fuel injector seal to the tip of the fuel injector set. Slide the fuel injector seal downward into the fuel injector set groove (fuel injector set connector side) with your fingers as shown in the illustration.
Tech Tips
Check that the fuel injector seal covers the circumference of the fuel injector set groove as shown in the illustration.
| *a | SST (Guide) |
Slowly slide SST (guide) toward the tip of the fuel injector set. When the fuel injector set contact surface of SST (guide) aligns with the fuel injector seal (fuel injector set tip side) as shown in the illustration, hold the position for 5 seconds or more to fully align the fuel injector seal into the fuel injector set groove.
Note
Be careful that the fuel injector seal is not pinched between SST (guide) and the fuel injector set groove. Replace the fuel injector seal if it becomes damaged.
Tech Tips
Set SST (guide) so that its bottom surface and the fuel injector seal are flush.
If there is difficulty in sliding SST upward, slowly wiggle it from side to side while sliding it up the fuel injector set little by little.
| *a | Normal |
| *b | Protruding |
| *c | Deformed |
| *d | CORRECT |
| *e | INCORRECT |
After installing the fuel injector seals, check that they are not scratched, deformed or protruding from the fuel injector set groove.
Note
If a fuel injector seal is scratched, deformed or protruding from the groove, replace it with a new one.
INSTALL FUEL INJECTOR SET
Tech Tips
Perform "Inspection After Repairs" after replacing the fuel injector assembly.
w/ EGR System Click here
w/o EGR System Click here
| *1 | Fuel Injector Set |
| *2 | C-ring |
| *3 | Injector Vibration Insulator |
| *a | Tapered Side |
Install a new injector vibration insulator and a new C-ring to the fuel injector set.
Note
Install the injector vibration insulator by aligning it with the tapered side of the fuel injector set.
Check that the C-ring is securely fit into the groove of the fuel injector set.
Install a new O-ring and new No. 1 fuel injector back-up ring to the fuel injector set as shown in the illustration.
| *1 | No. 1 Fuel Injector Back-up Ring | *2 | O-ring |
| *a | No. 1 Fuel Injector Back-up Ring Opening | *b | Overlapping |
| *c | Stretched | *d | CORRECT |
| *e | INCORRECT | - | - |
Note
Check that there is no foreign matter or damage on the O-ring groove of the fuel injector set.
Check that the No. 1 fuel injector back-up ring is installed in the correct direction.
Make sure that the No. 1 fuel injector back-up ring and O-ring are installed in the correct order.
Check that the alignment openings of the fuel injector back-up rings are not overlapped or stretched as shown in the illustration.
After installing the O-ring, check that it is not contaminated with foreign matter and is not damaged.
| *1 | Fuel Injector Set |
| *2 | No. 3 Fuel Injector Back-up Ring |
| *a | Notch |
Set a new No. 3 fuel injector back-up ring so that it is level as shown in the illustration, push in the fuel injector set and install the No. 3 fuel injector back-up ring.
Note
Make sure that the No. 3 fuel injector back-up ring is oriented correctly.
After installing the O-ring, make sure there is no damage or foreign matter.
Install the nozzle holder clamp to the fuel injector set.
Align the protrusion of the nozzle holder clamp with the positioning hole of the fuel delivery pipe and insert the fuel injector set.
| *a | Protrusion |
| *b | Positioning Hole |
|
No Gap |
Note
Make sure that there is no foreign matter or damage inside the fuel injector set installation holes (fuel delivery pipe sub-assembly).
Do not get gasoline on the O-rings or inside the installation holes.
If the fuel injector set is difficult to insert, apply new engine oil to the chamfered part of the fuel injector set installation hole of the fuel delivery pipe sub-assembly. Be careful as it is easier for the fuel injector set to fall out of the fuel delivery pipe sub-assembly in this case.
Keep the fuel injector set straight when inserting it into the fuel delivery pipe sub-assembly.
Check that there is no gap between the fuel delivery pipe sub-assembly and the nozzle holder clamp.
Install 4 fuel injector sets with the same flow classification number (the number to the left of the QR code which is 1, 2 or 3).
| *a | QR Code |
| *b | Flow Classification Number |
INSTALL FUEL DELIVERY PIPE SUB-ASSEMBLY
Apply lubricant to the fuel injector set installation hole.
| *a | Nut can be attached |
Insert the stud bolt into the fuel delivery pipe sub-assembly until the screw threads protrude enough so that a nut can be attached.
Note
If a fuel injector set is dropped or the tip of a fuel injector set is struck, replace it with a new one.
Check that there is no foreign matter or damage on the fuel injector set installation holes of the fuel delivery pipe sub-assembly.
When inserting the fuel delivery pipe sub-assembly, push it in evenly without tilting it.
Install the fuel delivery pipe sub-assembly by uniformly tightening the 3 bolts and 2 nuts in several steps in the order shown in the illustration.
Connect the 4 fuel injector set connectors.
Install the wire harness to the fuel delivery pipe sub-assembly with the 2 bolts.
Connect the fuel pressure sensor connector.
Note
Do not pull the wire harness of the fuel pressure sensor excessively.
INSTALL NO. 1 FUEL PIPE SUB-ASSEMBLY
Using a 17 mm union nut wrench, tighten the union nuts on the fuel pump with seal sub-assembly side of the No. 1 fuel pipe sub-assembly.
Note
Use the formula to calculate special torque values for situations where a union nut wrench is combined with a torque wrench Click here.
Do not adjust the torque in the loosening direction.
The No. 1 fuel pipe sub-assembly can be reused 10 times.
Tech Tips
This torque value is effective when the union nut wrench is parallel to the torque wrench.
Install the union nut wrench parallel with the torque wrench.
Using a 17 mm union nut wrench, tighten the union nuts on the fuel delivery pipe sub-assembly side of the No. 1 fuel pipe sub-assembly.
Note
Use the formula to calculate special torque values for situations where a union nut wrench is combined with a torque wrench Click here.
Do not adjust the torque in the loosening direction.
The No. 1 fuel pipe sub-assembly can be reused 10 times.
Tech Tips
This torque value is effective when the union nut wrench is parallel to the torque wrench.
Install the union nut wrench parallel with the torque wrench.
INSTALL INTAKE MANIFOLD