Product Handling Multec 3.5 Fuel Injector Application Manual
6-10 Delphi Energy and Chassis Systems
Revision: 11/05-1
7. Remove the injector from the fuel rail. Delphi recommends the use of
a specific Multec 3.5 removal tool (which is currently in development)
to aid in the removal of the injector. (Consult your Delphi
representative for current information). If such a tool is not available,
the injector can typically be removed by using a twisting motion while
pulling downward by hand.
Note
Application of an aerosol lubricant / penetrating oil (WD-40
or
equivalent) to the seal ring / socket area will aid in injector removal in a
high mileage vehicle. Observe safety precautions when using flammable
materials in the engine compartment.
8. Carefully clean debris from the interface surfaces. Do not damage seal
mating surfaces.
9. Install the appropriate injector clip to the replacement injector.
Note
Do not allow contaminants to enter the manifold or fuel rail when
removing the seal ring or when cleaning mating surfaces.
10. Apply a light coating of a lubricant to both the upper and lower
injector seal ring of the replacement injector. See Table 6-2 for
recommended lubricants.
Caution
Avoid applying lubricant over the director holes in the injector.
Note
The preferred service technique is to apply the lubricant to the injector
seal ring itself. This will help minimize the possibility of injector
contamination.
11. Install the new injector into the fuel rail assembly. Check that the
injector is installed in the original orientation to maintain proper spray
targeting, and that the retaining clip is properly seated on the injector
and fuel rail.
12. Install the fuel rail assembly (refer to the appropriate service manual
procedure).
13. Tighten the rail mounting screws to specification.
Note
Hand tighten the bolts before using a torque wrench to tighten them fully.
Caution
Avoid contacting and damaging the electrical connector’s locking tab
during installation
14. Re-install the injector electrical connector and CPA lock (if used)
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