{"product_id":"camotokiit-4795-tdc-piston-stop-tool-14mm-bolt-style-heads-on-steel-m14-x-1-25","title":"Camotokiit 4795 TDC Piston Stop Tool 14mm Bolt-Style (Heads-On) — Steel, M14 x 1.25","description":"\u003cp\u003e\u003cstrong\u003eCamotokiit 4795 is a 14 mm bolt-style steel piston stop that screws into a spark plug hole to positively locate Top Dead Center (TDC) with the engine heads installed.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis precision-engineered TDC tool gives mechanics and home tuners a reliable, repeatable reference point for timing, camshaft work, compression checks, and engine assembly when you need to find true piston Top Dead Center without removing cylinder heads. Made from cadmium-finished steel and threaded M14 x 1.25, the bolt-style design installs through the spark plug bore, halting piston travel gently and securely so you can mark or index crank position safely.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this piston stop help me find TDC accurately?\u003c\/h3\u003e\n\u003cp\u003eThe Camotokiit 4795 physically prevents the piston from travelling past its topmost point, creating an unmistakable mechanical stop so you can identify TDC precisely. Unlike visual timing marks alone, a piston stop measures actual piston position relative to crank rotation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThreads into M14 x 1.25 spark plug hole for direct piston contact\u003c\/li\u003e\n  \u003cli\u003eSteel construction with cadmium finish resists wear and corrosion\u003c\/li\u003e\n  \u003cli\u003eProvides a tactile, repeatable stop for precise crank indexing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I use this tool with the cylinder heads still on?\u003c\/h3\u003e\n\u003cp\u003eYes — this item is the bolt-style, heads-on version designed specifically to be used without removing cylinder heads. It screws into the spark plug well so you can find TDC on assembled engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeads-on application avoids disassembly and saves time\u003c\/li\u003e\n  \u003cli\u003eIdeal for engines with accessible spark plug threads\u003c\/li\u003e\n  \u003cli\u003eSingle-piece design for quick installation and removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the 14 mm thread compatible with my vehicle?\u003c\/h3\u003e\n\u003cp\u003eThe tool is threaded M14 x 1.25, which fits many common spark plug ports and performance engines. Verify your engine's spark plug thread size before purchase to ensure fit; adapters or alternate sizes are available from other suppliers when needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread spec: 14 mm x 1.25 pitch (M14 x 1.25)\u003c\/li\u003e\n  \u003cli\u003eCheck factory service manual for your vehicle's spark plug thread size\u003c\/li\u003e\n  \u003cli\u003eWorks on many performance and racing applications with M14 plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat precautions should I take when using the piston stop?\u003c\/h3\u003e\n\u003cp\u003eUse hand force rather than power tools to thread the stop in and out to avoid damaging threads or the piston. Rotate the crankshaft slowly by hand against the stop and never force the engine past the tool to prevent component damage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall and remove by hand; no impact or air tools\u003c\/li\u003e\n  \u003cli\u003eTurn crankshaft slowly and observe resistance as piston contacts the stop\u003c\/li\u003e\n  \u003cli\u003eKeep threads clean and lightly lubricated to prevent galling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Camotokiit 4795 TDC piston stop is aimed at professional mechanics, engine builders, and DIY enthusiasts who need a straightforward, durable method to locate Top Dead Center on engines with heads in place. It's especially useful for high-performance and racing applications, timing work, valve adjustments, and any situation where precise crankshaft indexing is required. New units ship ready to use, and the cadmium-plated steel construction gives long service life in workshop conditions.\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: What thread size is the Camotokiit 4795?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It uses an M14 x 1.25 (14 mm x 1.25) thread, fitting many common spark plug ports.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this tool with the cylinder head installed?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The bolt-style 4795 is designed for heads-on use by threading into the spark plug hole.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Camotokiit","offers":[{"title":"Default Title","offer_id":48084350632094,"sku":"B0FB98S2PB","price":32.73,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/camotokiit-4795-front-view.jpg?v=1785851393","url":"https:\/\/northtrailauto.ca\/products\/camotokiit-4795-tdc-piston-stop-tool-14mm-bolt-style-heads-on-steel-m14-x-1-25","provider":"North Trail Auto","version":"1.0","type":"link"}