Aftermarket online service:
How to install injector?
The fuel injectors with cross-under pipe must be installed in accordance with the below procedures.Because the possibility of cross-under pipe damage may cause high-pressure fuel leakage or gas leakage in the cylinder, resulting in more serious engine failure.
1.Insert the injector into the mounting hole.
2.Use a wrench to tighten the bolts that hold the injector in place
3.Completely loosen the bolts holding the injector
4.Load cross-under pipe
5.Pretighten the cross-under pipe
6.Tighten the fuel injector bolts according to the specified torque 
7.Tighten cross-under pipe according to specified torque