{"product_id":"ngk-v-power-nickel-spark-plugs-wr5-8-pack-for-pre-1980-ford-mercury-v-cut-electrode","title":"NGK V-Power Nickel Spark Plugs WR5 — 8-Pack for Pre-1980 Ford \u0026 Mercury, V-cut Electrode","description":"\u003cp\u003e\u003cstrong\u003eNGK 2438 OE Series V-Power nickel spark plugs (WR5) are OE-style replacement plugs designed to restore dependable ignitability and smooth idle for select pre-1980 Ford and Mercury engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese NGK V-Power plugs are engineered to match original-equipment nickel-plug performance while using NGK materials and manufacturing standards. The V-cut center electrode and concave ground electrode improve the spark’s initiation compared with plain nickel designs, while NGK’s high-grade alumina silicate ceramic insulator and trivalent plating help resist corrosion and seizing. This listing is an 8-pack intended for engines that originally used WR5-style nickel plugs—always confirm fitment against your vehicle or NGK reference before purchasing.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these plugs improve starting and idle on older Ford\/Mercury engines?\u003c\/h3\u003e\n\n\u003cp\u003eThe V-cut center electrode focuses the spark energy to encourage faster flame kernel development at the moment of ignition, which can translate to easier starting and a steadier idle compared with flat-faced nickel plugs. The concave ground electrode complements that geometry to help maintain consistent firing under light-load conditions.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eV-cut nickel alloy center electrode for enhanced ignitability\u003c\/li\u003e\n  \u003cli\u003eConcave ground electrode for more consistent spark gap performance\u003c\/li\u003e\n  \u003cli\u003eSolid copper core for efficient heat dissipation and conductivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these NGK WR5 plugs fit my pre-1980 Ford or Mercury?\u003c\/h3\u003e\n\n\u003cp\u003eThese plugs are manufactured to OE-style dimensions: 18 mm thread diameter, 1.5 mm pitch, tapered seat, 11 mm reach, 13\/16\" (21 mm) hex, and a 1.0 mm (0.039\") gap. They are intended for vehicles originally equipped with nickel alloy plugs and should be cross-checked against factory part numbers or NGK fitment charts.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eThread diameter: 18 mm; pitch: 1.5 mm; reach: 11 mm (7\/16\")\u003c\/li\u003e\n  \u003cli\u003eHex size: 13\/16\" (21 mm); terminal type: solid\u003c\/li\u003e\n  \u003cli\u003ePre-set gap: 0.039\" (1.0 mm); heat range: 5; resistor: 5 kΩ\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and construction features keep these plugs reliable over time?\u003c\/h3\u003e\n\n\u003cp\u003eNGK builds these WR5 plugs with a high-grade alumina silicate ceramic insulator for strong dielectric performance and a 98% pure copper core to manage heat and conductivity. The nickel alloy electrodes and trivalent metal plating help prevent corrosion and make installation and removal less prone to seizing compared to unplated steel shells.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHigh-grade ceramic insulator for improved electrical stability\u003c\/li\u003e\n  \u003cli\u003eSolid copper core for heat control and electrical conductivity\u003c\/li\u003e\n  \u003cli\u003eTrivalent metal plating for anti-corrosion and anti-seize protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and torque these plugs to avoid damage?\u003c\/h3\u003e\n\n\u003cp\u003eInstall the plugs by hand until fingertight, then use a torque wrench to reach the recommended range appropriate for your cylinder head material. Tightening to the correct torque prevents thread damage and ensures the proper sealing and heat transfer necessary for plug longevity.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTorque range for cast iron and aluminum heads: 14.5–21.6 lb·ft\u003c\/li\u003e\n  \u003cli\u003eHand-start threads to avoid cross-threading, then torque to spec\u003c\/li\u003e\n  \u003cli\u003eConfirm gap and heat range before installation if engine specs differ\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This 8-pack of NGK 2438 OE Series V-Power WR5 spark plugs is intended for owners, restorers, and mechanics working on pre-1980 Ford and Mercury vehicles that originally used nickel alloy spark plugs. It’s best for engines where OE-style nickel plugs are specified rather than modern precious-metal plug applications. Verify your engine’s plug type and physical dimensions before ordering to ensure compatibility.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are NGK 2438 plugs compatible with precious-metal plug engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These WR5 nickel alloy plugs are meant for engines originally equipped with nickel plugs, not for engines requiring precious-metal plugs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these plugs require a specific gap adjustment before installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They come pre-gapped at 0.039\" (1.0 mm), but you should verify and adjust the gap to your engine manufacturer's specification if needed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48082967462046,"sku":"B07YN9S5VX","price":52.64,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-2438-front-packaging.jpg?v=1785820833","url":"https:\/\/northtrailauto.ca\/products\/ngk-v-power-nickel-spark-plugs-wr5-8-pack-for-pre-1980-ford-mercury-v-cut-electrode","provider":"North Trail Auto","version":"1.0","type":"link"}