Nissan Distributor E20 L18 1800 1600

The Nissan Distributor E20 is an ignition system component found in Nissan vehicles, particularly those equipped with the L18 and L16 engines. This type of distributor was commonly used in older Nissan models like the Datsun 510, 610, 710, and various trucks in the 1960s and 1970s. Here's a detailed breakdown of its components and functionality:

The Nissan Distributor E20 is part of a traditional mechanical ignition system, responsible for distributing high-voltage electricity from the ignition coil to the correct spark plug in the engine's firing sequence. It works in tandem with the engine's camshaft to ensure proper timing of the ignition spark, allowing the engine to run efficiently.

Key Specifications and Components:
Body and Housing:
The E20 distributor is usually housed in a compact aluminum body, designed for durability and heat resistance.
The housing contains mounting points to secure it to the engine block, and it's typically adjusted manually to fine-tune the timing of the engine.

Cap:
The distributor cap is made of durable plastic and contains multiple terminals, typically 4 or 6, depending on the engine. Each terminal is connected to a spark plug wire that leads to a specific cylinder.
The cap shields the rotor and internal components from moisture, dust, and debris, which could interrupt the ignition process.

Rotor:
A rotor sits inside the distributor, connected to the engine's camshaft via the distributor shaft. It rotates in sync with the engine and directs high voltage from the ignition coil to each terminal on the distributor cap.
As the rotor turns, it makes contact with each terminal, sending electricity to the corresponding spark plug in the correct firing order.

Breaker Points and Condenser:
Traditional distributors like the E20 use breaker points, a mechanical switch that opens and closes as the camshaft rotates. This action creates and breaks the electrical circuit between the ignition coil and the distributor, triggering a spark.
The condenser (capacitor) is connected to the points and helps prevent arcing across them by absorbing the electrical surge when the points open.

Ignition Coil:
The ignition coil is external to the distributor but works closely with it. The coil transforms the 12V electrical current from the battery into the high voltage necessary to jump the gap in the spark plugs and ignite the air-fuel mixture in the cylinders.

Vacuum Advance:
Some models of the E20 distributor feature a vacuum advance unit, which adjusts the timing of the spark based on engine load and speed. When the engine is under heavy load, the vacuum advance retards the timing to prevent knocking, ensuring smoother performance.
It consists of a vacuum diaphragm connected to the carburetor or intake manifold, which moves a plate inside the distributor to adjust the timing.

Centrifugal Advance:
The distributor also includes a centrifugal (mechanical) advance system, which uses weights and springs to adjust the spark timing based on the engine's RPM. At higher RPMs, the weights expand outward due to centrifugal force, advancing the timing to optimize performance.
Compatibility with L16 and L18 Engines:
L16 (1.6L Engine): The L16 engine is a 1.6-liter inline-4 engine commonly used in Datsun 510 and other models from the late 1960s to early 1970s. The distributor for this engine, like the E20, is essential for ensuring proper spark timing and consistent engine performance.

L18 (1.8L Engine): The L18 engine is a slightly larger 1.8-liter version of the L-series engines. It was used in the Datsun 610, 710, and early trucks. The E20 distributor is compatible with this engine, providing the necessary spark distribution to each of the four cylinders.

Maintenance and Tuning:
Timing Adjustment: The distributor's base timing can be adjusted by loosening the hold-down bolt and rotating the distributor body to advance or retard the ignition timing. This adjustment ensures optimal engine performance, fuel economy, and emissions control.

Breaker Points Adjustment: Over time, the breaker points wear out and need to be adjusted or replaced. This involves setting the correct point gap, typically measured with a feeler gauge.

Cap and Rotor Replacement: The cap and rotor are prone to wear and tear and should be replaced periodically. Symptoms of a worn cap or rotor include misfiring, rough idling, or difficulty starting.

The Nissan Distributor E20 is a critical component for ensuring proper ignition timing and spark distribution in vehicles equipped with the L18 and L16 engines. Its combination of mechanical and vacuum advance systems makes it a versatile and reliable choice for older Nissan and Datsun vehicles, though it requires regular maintenance to ensure long-term performance.

What's in the box
1 x Nissan Distributor E20 L18 1800 1600