{"product_id":"moroso-spark-plug-indexing-washers-14mm-flat-seat-precision-thin-shims-for-electrode-alignment","title":"Moroso spark plug indexing washers 14MM flat-seat — precision thin shims for electrode alignment","description":"\u003cp\u003e\u003cstrong\u003eMoroso 71910 spark plug indexing washers are thin, precision-cut shims designed to rotate and align 14mm flat-seat spark plugs for optimal electrode position and clearance.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese indexing washers let you fine-tune the orientation of the spark plug electrode after the plug is torqued into a 14mm flat-seat cylinder head. Rather than reworking plugs or the head, the washer provides small angular adjustment so the electrode points where you want it. The part is vehicle-specific in fitment and intended for performance tuning, custom engine builds, and restorations where plug electrode positioning matters.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these washers affect spark plug orientation?\u003c\/h3\u003e\n\u003cp\u003eThe Moroso 71910 washers sit between the spark plug and the cylinder head sealing surface, allowing rotational adjustment without altering torque settings. They are precision machined to keep the plug seated correctly while shifting electrode timing orientation by small degrees.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 14mm flat-seat spark plugs and corresponding cylinder heads.\u003c\/li\u003e\n  \u003cli\u003eThin, consistent thickness prevents sealing issues when installed properly.\u003c\/li\u003e\n  \u003cli\u003eEnables electrode rotation to face the intake or exhaust side as needed.\u003c\/li\u003e\n  \u003cli\u003eMaintains factory torque specifications when torqued with proper practice.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these washers fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eFitment is vehicle-specific: they are made for 14mm flat-seat spark plug applications only. Confirm your engine uses 14mm flat-seat plugs and verify clearance requirements before purchase to ensure compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned specifically for 14mm, flat-seat spark plugs.\u003c\/li\u003e\n  \u003cli\u003eNot compatible with tapered-seat or other diameter plugs.\u003c\/li\u003e\n  \u003cli\u003eCheck your engine’s plug specification in the service manual or with the parts seller.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do you install and torque with an indexing washer?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: place the washer on the plug’s sealing surface, thread the plug into the head by hand, and torque to the manufacturer’s spec. After torquing, rotate the plug slightly if needed to achieve the desired electrode orientation — the washer will allow the adjustment without losing the proper clamp.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHand-start the plug, then use a torque wrench to specified ft·lb or N·m.\u003c\/li\u003e\n  \u003cli\u003eRotate the mounted plug gently to set electrode angle; avoid over-tightening.\u003c\/li\u003e\n  \u003cli\u003eUse anti-seize or thread lubricant per OEM recommendation to prevent galling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there performance or reliability considerations?\u003c\/h3\u003e\n\u003cp\u003eWhen used correctly, indexing washers provide orientation benefits with minimal compromise to sealing or reliability. Always follow torque specs and use the correct washer thickness for your clearance needs to avoid compression or mis-seating.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProper torque and correct washer thickness preserve sealing integrity.\u003c\/li\u003e\n  \u003cli\u003eNot a substitute for damaged seats or worn threads—repair as necessary first.\u003c\/li\u003e\n  \u003cli\u003eIntended for tuning, performance engines, restorations, and custom applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Moroso 71910 14mm flat-seat spark plug indexing washer is aimed at mechanics, engine builders, tuners, and DIY enthusiasts who need precise electrode alignment in 14mm flat-seat plug applications. It's ideal for performance engine tuning, race prep, classic car restorations, and any situation where electrode orientation can improve ignition consistency or clearance. Confirm plug seat type and vehicle compatibility before use, and follow standard torque and installation procedures for safe, reliable results.\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: Can I use this washer on tapered-seat spark plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The Moroso 71910 is made for 14mm flat-seat spark plugs only and will not seat correctly on tapered plugs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the washer affect spark plug torque or sealing?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: If installed to the correct torque and used with compatible parts, the washer maintains proper sealing while allowing electrode rotation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Moroso","offers":[{"title":"Default Title","offer_id":48086777528478,"sku":"B000COS7AO","price":51.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/moroso-spark-plug-indexing-washer-flat-seat-front.jpg?v=1785904707","url":"https:\/\/northtrailauto.ca\/products\/moroso-spark-plug-indexing-washers-14mm-flat-seat-precision-thin-shims-for-electrode-alignment","provider":"North Trail Auto","version":"1.0","type":"link"}