DENSO Auto Parts 4509 spark plug for the 1975-1979 Ford F-150 V8 7.5L, the 1975-1984 F-150 V8 5.0L, the 1977-1979 F-150 V8 6.6L, the 1977-1983 F-150 V8 5.8L and other vehicles ignites the air-fuel mixture in each cylinder.
- Platinum TT twin-tip design with a 1.1 mm platinum center electrode and a 1.5 mm titanium-enhanced ground electrode
- Intended to support fuel economy and engine performance
- Twin-tip design that speeds flame propagation for more complete combustion
- Copper center electrode core with a platinum tip, and a nickel ground electrode core
Quick facts
- Part: DENSO Auto Parts 4509 spark plug
- Fits: the 1975-1979 Ford F-150 V8 7.5L, the 1975-1984 F-150 V8 5.0L, the 1977-1979 F-150 V8 6.6L, the 1977-1983 F-150 V8 5.8L and other vehicles
- Condition: New
Hard starting, a misfire or a rough idle can mean worn plugs, though the plug wires or the ignition coil can be behind them too, so find the cause before replacing anything.
Fits
This plug is listed for a wide range of Ford, Chevrolet and Buick models, including the 1988-1993 Chevrolet C1500 V6 4.3L or V8 5.7L, the 1991-1993 C1500 V8 7.4L and the 1988-1993 Chevrolet K1500 V6 4.3L or V8 5.7L. The V8 engines take eight plugs and the 4.3L V6 takes six. For any other year or engine, look in the Vehicles it fits section.
Specifications
Fit and size
- Quantity per vehicle: 6 or 8, depending on the engine
- Thread diameter: 14 mm
- Reach: 11.6 mm
- Hex size: 16 mm
- Seat type: Tapered
- Pre-gap: 1.0 mm
- Heat range: 16
Build and materials
- Ground configuration: Twin-tip
- Center electrode tip: Platinum
- Center electrode core: Copper
- Ground electrode tip design: Titanium-enhanced twin-tip
- Ground electrode core: Nickel
- Resistance: 5,000 ohms
- Condition: New
- Country of origin: Japan
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
4289 155, PTF16TT, ASF42, ASF42C, ASF42CF4, ASF42P, ASF52, 19208523, 19300383, 19300873, 19301654, 19302742, 19310656, 5613302, 5613794, 5613842, 5613867, 5613877, 5613935, 5613956, 5613957, 5614229, 5614243, 88901021, 88901022
Frequently Asked Questions
Is this Ford F-150 spark plug the right one for the 1975-1979 model with the V8 7.5L?
Yes. DENSO Auto Parts 4509 is listed for the 1975-1979 Ford F-150 V8 7.5L, and that engine takes eight plugs. Other years and engines are in the Vehicles it fits section.
Are these K1500 spark plugs the right ones for the 1988-1993 Chevrolet with the V6 4.3L or V8 5.7L?
Yes. DENSO Auto Parts 4509 is listed for the 1988-1993 Chevrolet K1500 V6 4.3L, which takes six plugs, and the V8 5.7L, which takes eight.
What gap and thread size does the DENSO 4509 plug have?
DENSO Auto Parts 4509 comes pre-gapped at 1.0 mm. It has a 14 mm thread diameter, an 11.6 mm reach, a 16 mm hex and a tapered seat.
What is the platinum twin-tip design on this spark plug for?
The twin tip pairs a 1.1 mm platinum center electrode with a 1.5 mm titanium-enhanced ground electrode. It is meant to speed flame propagation for more complete combustion.
What resistance does this platinum spark plug have?
This DENSO Auto Parts 4509 plug has a resistance of 5,000 ohms.
