NGK Spark Plug P/N:3072
NGK 6334 spark plug for the 1978-1980 Jeep Cherokee 6-cylinder 4.2L and other vehicles ignites the air-fuel mixture in the cylinder. NGK spark plugs in the V-Power line pair a V-cut nickel alloy center electrode with a concave ground electrode to increase ignitability.
A worn plug can show up as hard starting, a rough idle or a misfire. Ignition wires, a weak coil, a fuel delivery problem or a vacuum leak can be behind the same signs, so find the cause before buying plugs.
This plug is listed for a wide range of American Motors and Jeep models, including the 1978-1980 Jeep Cherokee 6-cylinder 4.2L, the 1978-1979 American Motors Concord 4-cylinder 2.0L or 6-cylinder 3.8L and the 1978-1980 Concord 6-cylinder 4.2L, and the 1978 Jeep CJ5 6-cylinder 3.8L and the 1978-1980 CJ5 6-cylinder 4.2L. Open the Buyer's Guide tab to check your exact model and engine.
Fit and size
Build and materials
One spark plug. The 4-cylinder 2.0L engines take four and the 6-cylinder engines take six, so order that many and fit them together.
Interchange: ZGR5C
Is the NGK 6334 the right Jeep Cherokee spark plug for the 1978-1980 model with the 6-cylinder 4.2L?
Yes. The NGK 6334 is listed for the 1978-1980 Jeep Cherokee 6-cylinder 4.2L, which takes six plugs.
Will the NGK 6334 fit the 1978-1979 American Motors Concord 4-cylinder 2.0L?
Yes. NGK 6334 is listed for that engine, and the 4-cylinder takes four plugs, so order four.
What is the center electrode of the NGK 6334 made of?
The NGK 6334 has a V-cut nickel alloy center electrode and a solid copper core, 98% pure copper, for heat dissipation and conductivity.
Can the NGK 6334 go in a vehicle that has factory platinum or iridium plugs?
No. The NGK 6334 is a nickel alloy plug with a copper core and is not recommended on vehicles with factory precious metal plugs.
Is ZGR5C the same plug as the NGK 6334?
Yes. NGK lists this spark plug under both 6334 and ZGR5C, so a search for either number finds it.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.