DENSO Auto Parts Spark Plug P/N:4707
DENSO Auto Parts 5008 spark plug for the 1975-1976 Ford F-150 V8 5.9L or 6.4L, the 1975-1989 F-150 6-cylinder 4.9L and other vehicles ignites the air-fuel mixture in each cylinder. The plug is OE-grade.
A worn plug can show up as hard starting, a rough idle or a misfire. Ignition wires, a weak coil or a fuel-delivery problem can be behind those signs too, so track down the cause before you buy plugs. Order one plug per cylinder: six for the 6-cylinder 4.9L engines and eight for the V8s.
It is listed for a wide range of Ford models. Beyond the trucks named at the top, that includes a spark plug for the 1964-1970 Ford Mustang 6-cylinder 3.3L and the 1965-1989 Ford F-250 6-cylinder 4.9L. If your truck or car is not named here, look up its year and engine in the "Vehicles it fits" section.
Fit and size
Build and materials
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
Is this the right Ford F-150 spark plug for the 1975-1989 model with the 6-cylinder 4.9L?
Yes. DENSO Auto Parts 5008 is listed for the 1975-1989 Ford F-150 6-cylinder 4.9L, which takes six plugs, and for the 1975-1976 F-150 V8 5.9L or 6.4L, which takes eight.
Are these the right Ford F-250 spark plugs for the 1965-1989 model with the 6-cylinder 4.9L?
Yes. DENSO Auto Parts 5008 is listed for the 1965-1989 Ford F-250 6-cylinder 4.9L, which uses six plugs. For other years and engines, use the "Vehicles it fits" section.
What thread size and reach does this DENSO spark plug have?
This plug has an 18.0 mm thread diameter, an 11.6 mm reach, a tapered seat, a 20.6 mm hex and a heat range of 16.
How can I tell if the plugs in my engine are worn?
Hard starting, a rough idle or a misfire can point to worn plugs. With the engine off and cool, a pulled plug with a worn electrode, heavy deposits or a cracked insulator is due for replacement.
What does the U-Groove ground electrode on this plug do?
The patented U-Groove cut in the ground electrode allows a larger flame front. That gives improved ignitability and increased engine efficiency.
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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.