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Catalog #70005
Rev. 07/08 - AJ/mc
©2008 Edelbrock Corporation
Brochure No. 63-70005
Page 16 of 20
6.0 Solenoid Inspection and Maintenance
1. Close valve on nitrous bottle.
2. Make sure all nitrous supply lines are free of pressure before removal of any system solenoid.
a. Empty main nitrous supply line at the nitrous bottle. Take care to not breathe or expose your skin to nitrous.
b. Do not open pressurized fuel lines over a hot engine.
3. Remove nitrous solenoid from the engine and securely clamp it into a vise, taking great care not to damage the solenoid.
4. Remove the solenoid cover, retaining nut from top of the nitrous solenoid.
5. Remove coil and housing from nitrous solenoid base.
6. Unscrew stem from nitrous solenoid base. Do this by using a solenoid stem removal tool or by “double nutting” the stem
and unscrewing the stem from the housing body. Do not use pliers on solenoid stem; damage to the stem will result.
7. Carefully remove the stem, spring and plunger from the solenoid base paying close attention to the way they are
assembled.
8. Examine the plunger seal for swelling, cuts and abrasions. The seal surface should be flat, except for a small circular
indentation in the center of the seal. A seal that has been contaminated or over-pressurized will bulge from exposure
to chemicals other than nitrous oxide. It can appear to extend down from the plunger and be dome-shaped. A
contaminated seal may return to its original shape if left out in fresh air for approximately 48 hours. It may then be
returned to service. If it does not return to its original shape, it must be replaced.
9. Clean the solenoid body. Do not use an oil-based solvent to clean any part of the solenoid.
Use paint thinner
or electrical contact cleaner. Remove any contaminants that may be present. Make sure solenoid body is clean, dry
and free of oils before assembly.
10. Replace the O-Ring, plunger and piston spring.
11. Re-assemble solenoid by reversing disassembly procedure.
8. What Happened? Did your vehicle go faster? slower? What did the engine sound like? Did the nitrous system work?
Refer to the timing charts, and examine spark plugs for signs of detonation.
a. If power increased or vehicle mph increased and your spark plugs show no signs of overheating or detonation, you
could try to increase ignition timing 1° to 2°.
b. If power increased or vehicle mph increased and spark plugs begin to show slight signs of detonation - STOP! Do
not advance timing further. You may choose to reduce timing 2° at this point for an extra margin of safety. At this
point, you need to look at the “Troubleshooting” section for assistance. Pay close attention to the fuel supply with
your nitrous system.
c. If power decreases or vehicle mph decreases, check for burned spark plug or engine damage, and reduce ignition
timing 2°. Please refer to the “Troubleshooting” section of this manual for help in determining any system trouble
you may feel that you are having.
9. Repeat step 6 until optimum ignition timing is obtained.