What does the HEI distributor cap firing order mean?
HEI Distributor Cap Firing Order. The distributor is the mechanism that sends voltage from the ignition coil to the spark plug. Most small block Chevy’s use a HEI distributor which stands for “High Energy Ignition.” On a small block Chevy V8 engine, the distributor cap firing order is in a clockwise rotation.
How to find the number one on a distributor cap?
It will be connected to the number one terminal. You can also find the number one terminal by turning the engine manually until the timing marks on the camshaft and crankshaft are lined up. Once this is done, the rotor inside the distributor will be pointing to the number one terminal.
How is the distributor cap connected to the spark plugs?
Picture the distributor cap as a crown that a king would wear. The points of the crown are where the distributor is connected to the spark plugs by spark plug wires. Each point connects to one spark plug, and each spark plug goes to one cylinder in your engine.
When to remove distributor cap from ignition system?
While performing maintenance on your ignition system, you should remove the distributor cap in order to clean the contacts or replace the cap. But when you put a distributor cap back on, it must be done a certain way. Become familiar with your distributor before you take it apart. It looks like a cup with spikes on top.
What’s the difference between a HEI distributor and a cap?
“HEI” V-6 distributors – a Primer GM’s HEI (“high energy ignition”) distributors look alike on the outside, but have important differences on the inside which make them specific to the respective applications for which they were designed. The cap is the most obvious difference.
Where is the rotor located on a Hei odd fire engine?
Photo of an HEI odd fire distributor cap and diagram of an HEI odd fire pole piece and reluctor. The rotor is charged by a change in the magnetic field of the reluctor (i.e. magnetic pick up). The reluctor is located in the distributor housing (see the photo) – it looks like a ring with points facing inward when viewed from above.
What’s the difference between even and odd fire V-6 caps?
The V-6 cap comes in two configurations: the even fire versions have evenly spaced terminals, whereas the odd-fire versions have some short terminals and some long. Upon careful examination of the odd-fire car, it becomes clear what’s going on. The distances between terminals corresponds to the 90-150-90 firing sequence.
What does even fire mean in a V-6 engine?
The odd-fire V-6 also has shared journals, but even and semi-even fire V-6’s have offset journals: one per connecting rod. Even Fire Almost all engines are even fire. Even fire simply means that the cylinders fire at even intervals with regard to the spinning of the crank.