14
NOTE:
The seals are designed so that if they fail due to over pressurization, they will not leak, the valve will just fail to flow nitrous
oxide.
Swelling of the nitrous solenoid plunger seal will reduce nitrous flow (causing an excessively rich nitrous/fuel condition and a loss of
power).
6.2.2 Nitrous Solenoid Plunger Disassembly and Inspection
1.
Close the valve on the nitrous bottle.
2.
Empty the main nitrous supply line.
3.
Remove the retaining nut from the nitrous solenoid.
4.
Remove the coil and housing from the nitrous solenoid base.
5.
Unscrew the stem from the nitrous solenoid base. Do this by double nutting the stem, or by using a solenoid stem removal tool.
Do not use pliers on the solenoid stem. Damage to the stem will result.
6.
Remove the stem, spring, and plunger from the solenoid base.
7.
Examine the plunger seal for swelling. The seal surface should be flat, except for a small circular indentation in the center of the
seal;
A fuel-contaminated seal will protrude from the plunger and be dome-shaped. A fuel-contaminated seal may return to its original
shape if left out in the fresh air for several days. It may then be returned to service.
A seal, which has been over-pressurized, may be dome-shaped, or the sealing surface may be flat with the seal protruding out of
the plunger. A dome-shaped seal may return to its original shape if left out in the fresh air for several days. It may then be
returned to service. A seal, which is flat, but protrudes from the plunger body has probably failed internally and should be replaced.
Exploded View of a Typical Solenoid