Spark Plug for 1987-1990 Jeep Wrangler & More - NGK 5084

NGK 5084 spark plug for the 1987-1990 Jeep Wrangler 6-cylinder 4.2L and other vehicles ignites the air-fuel mixture in the cylinder. This V-Power plug is among the NGK spark plugs made to improve ignitability for quicker starts and smoother idle.

• NGK V-Power spark plug line, a nickel alloy plug
• V-cut nickel alloy center electrode and concave ground electrode to increase ignitability
• Trivalent metal plating for anti-corrosion and anti-seizing properties
• High grade alumina silicate ceramic insulator for dielectric performance
• Solid copper core, 98% pure copper, for heat dissipation and conductivity
• Cold-rolled threads that help prevent cross-threading and damage to cylinder heads

Quick facts

• Part: NGK 5084 spark plug
• Fits: 1987-1990 Jeep Wrangler 6-cylinder 4.2L and other vehicles
• Condition: New

Hard starting, a rough idle or a misfire can point to worn spark plugs. These signs alone do not prove the plugs are at fault, though, since worn ignition wires can also misfire.

Fits

As a direct-fit spark plug, it also covers the 1981-1983 Jeep Cherokee 6-cylinder 4.2L, the 1984-1985 Cherokee 4-cylinder 2.5L and the 1981-1987 Jeep J10 6-cylinder 4.2L. Each cylinder gets one plug, so the 4.2L engines take six and the 2.5L engines take four. It is best for vehicles that came with nickel alloy plugs and is not recommended on vehicles with factory precious metal plugs. Open the "Vehicles it fits" section to check your exact model and engine.

Specifications

Interchange: ZFR5A-11