Description
The NGK YR5 (Stock #7052) is a resistor-type V-Power nickel spark plug designed for dependable ignition performance in a wide range of classic GM cars, trucks, vans, and medium-duty applications. Its V-groove center electrode improves ignitability for quicker starts, smoother idle, and reliable combustion.
Key Features
-
V-Power V-groove center electrode for improved ignitability
-
5k ohm resistor helps reduce electrical interference
-
Copper core for strong conductivity and heat dissipation
-
Trivalent metal plating for corrosion resistance and anti-seize protection
-
Tapered seat design for correct OE-style sealing
- Non-removable terminal nut
- Best suited for engines originally using standard nickel plugs
Specifications
General
- Part Number: YR5
- Stock Number: 7052
- Heat Range: 5
- Resistor: Yes
- Resistance: 5000 ohms
- Pre-Gap: 1.0 mm
Shell
- Thread Size: M14 x 1.25
- Reach: 11.2 mm
- Seat Type: Tapered
- Hex Size: 5/8" (16mm)
Electrodes
- Center Electrode: Nickel, V-groove
- Ground Electrode: Standard nickel
- Ground Configuration: J-gap
- Projection: Non-projected
Common Applications
Classic GM Passenger Cars
- Chevrolet Bel Air
- Chevrolet Biscayne
- Chevrolet Caprice
- Chevrolet Chevelle
- Chevrolet Camaro
- Chevrolet Monte Carlo
- Chevrolet Nova
- Buick Apollo
- Pontiac Ventura
- Pontiac Parisienne
GM Trucks, Vans, and SUVs
- Chevrolet Blazer / K5 Blazer
- Chevrolet C/K Series pickups and Suburbans
- Chevrolet G-Series vans
- Chevrolet P-Series step vans and chassis
- GMC C/K Series pickups and Suburbans
- GMC G-Series vans
- GMC P-Series chassis
- GMC Jimmy
Medium-Duty / Commercial
- Chevrolet B, C, P, T, and Kodiak series
- GMC B, C, P, and Topkick series
Performance Notes
-
Heat range 5 makes it suitable for many older carbureted and light-duty/truck gasoline engines
-
Tapered seat means it should only be used where that seat style is specified
- Designed as a standard replacement plug, not a platinum/iridium upgrade
- Typical service life: up to about 30,000 miles, depending on engine condition and operating environment
- Always confirm gap, seat type, and engine fitment before installation
