The method by which an internal combustion engine is powered comes from burning a fuel and air mixture in the engine cylinders under compression. The gases are ignited by a spark made to jump a small gap in the spark plug within each combustion chamber. The ignition system provides this spark. The spark must occur in each cylinder at precisely the proper time, and the spark in the other cylinders must follow in the correct sequence of firing order. In order to accomplish this the following units are required:
- Battery, this supplies the electrical energy.
- Ignition Coil, transforms the battery low tension current to high tension current which can jump the spark plug gap in the cylinders under compression.
- Distributor, delivers the spark to the correct cylinders and used the mechanical breaker, this opens and closes the primary circuit at the exact time.
- Spark Plugs, provide the gap in the engine cylinders.
- Wiring, connects the various units.
- Ignition Switch, controls the battery current when desiring to start or stop the engine.
Distributor: The distributor is located on the right side of the engine and is operated by a coupling on the oil pump shaft, this is driven by a spiral gear on the camshaft. The spark advance is automatic, controlled by built-in centrifugal weights. Some parts of the distributor can be checked or replaced while the distributor is mounted on the engine, it is best to occasionally remove it for a good check. Detailed instructions on the removal of your old worn out distributor and installation new distributor.
- Examine the distributor points. If showing wear, poor mating, transferred metal, or pitting then new ones should be installed. Clean the points with a proper solvent and a stiff bristled brush.
- Check the alignment of the point for a full contact. If not properly aligned, bend the stationary contact bracket slightly to provide alignment.
- The contact gap should be set at .020″ measured with a wire gauge. The gap is adjusted by loosening the lock screw and turning adjustment eccentric screw until correct gap. The fiber block on the breaker arm should be resting on the highest point on the cam while the adjustment is made. Recheck the gap after locking adjustment.
- Apply thin film of cam lubricant to the cam to lessen fiber block wear.
- Check point contact spring pressure, should be between 17 and 20 ounces. Check with a spring scale hooked on the breaker arm at the contact and pull at right angle to the breaker arm. Execute the reading just as the points separate. Adjust the point pressure by loosening the stud holding the end of the contact arm spring and slide the end of the spring in or out. Re-tighten the stud and check the pressure. Too low pressure will cause engine missing at high speeds. Too high a pressure will cause rapid wear of the cam, block, and points.
How to remove the ignition coil from your Willys Jeep – Part of an ongoing “Jeep” disassembly and restoration series sponsored by Kaiser Willys.
To watch other videos on the disassembly of your Willys Jeep Vehicle refer to The Build Your Willys series on YouTube. Order the Service Manual For The Universal Jeep Vehicles, includes complete vehicle disassembly, assembly, and blowup diagrams.
Complete Solid State Electronic Ignition Distributor 12 volt For 41-71 Jeep & Willys with 4-134 engine
Direct replacement for all 12 volt systems. Comes complete with cap and simple wire hook up with instructions. Does away with old points and moving parts of original distributors.
Call Mike @Kaiserwillys.com for details at TOLL FREE 1-888-648-4923 (Mon-Fri, 9AM-5PM EST).
Electronic Ignition Distributor for 12 volt Systems – Part#: 923068
Q: What type of coil can be used? If coil requires a ballast resistor, do the internal electronics replace the resistor or do I still need to use it? Do I remove the stock condenser?
- A: You want to use an internal resist coil. But you can use an external resist coil. The instructions come complete with how to wire up either. It is very simple to do.
Q: Can a vacuum advance be fitted?
- A: No it doesn’t need it. It uses a centrifical advance.
Q: Are replacement caps, rotors, available?
- A: Sure. Please call me toll free.
*EMAIL or call Mike Toll Free (1-888-648-4923) Mon-Fri, 9am-5pm EST if you have any questions about this part or restoring your Willys.