Spark Plug Wire Position On Distributor Cap

Each point connects to one spark plug and each spark plug goes to one cylinder in your engine.

Spark plug wire position on distributor cap.

Picture the distributor cap as a crown that a king would wear. Each contact point on the distributor cap is connected to a plug wire that takes the spark to the spark plug. See onallcylinders firing order cheat sheet for installing the plug wires in the correct order. Our small block chevy firing order is 1 8 4 3 6 5 7 2 so that s the order in which we will install the plug wires.

Lift the old rotor off and install the new one making sure it is aligned the same way the old one was. V8 distributor cap spark wires off by one position on. The rotor contacts the appropriate point on the distributor cap to carry voltage from the coil to the spark plug wire and finally to the spark plug. Set the cap and wires out of the way.

So a six cylinder car will have six contacts on the distributor. The points of the crown are where the distributor is connected to the spark plugs by spark plug wires. In most cases it doesn t matter where the number one position is on your distributor cap as long as the plug wires are in the correct firing order. The spark plugs are screwed into the cylinder head which means that the end of the plug is sitting at the top of the cylinder where the action happens.

Photo on left is the standard lucas vacuum advance distributor with side entry distributor cap. Photo on right is my mallory dual points distributor with stop entry distributor cap and no vacuum. We started with number one and worked our way around the distributor cap clockwise using a set of summit spark plug wires. Note the position of the distributor s rotor the vehicle should not be moved and the engine should not be turned over until the installation is complete.

June 20 2015 10 34 06 am on my 65 the wires are installed in correct firing order on cap but i noticed that plug wire 4 is not in same position as the shop manual next to cap window. 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. Remove the distributor cap leaving the spark plug wires attached. If converting from a point type distributor label the.

For those confused about where spark plug wires connect to the distributor cap here s a couple of pictures. Connect a spark plug wire between the number one cylinder and the distributor s number one terminal. Step 5 recall whether your rotor moves clockwise or counterclockwise and connect remaining spark plug wires one at a time following the firing order located in the manual. These parts can wear out over time and replacing your spark plugs spark plug wires distributor cap and rotor are all parts of a good tune up.