{"product_id":"melling-replacement-oil-pump-m55-for-small-block-chevy-cast-iron-direct-fit-standard-volume","title":"Melling Replacement Oil Pump M55 for Small Block Chevy — Cast-Iron Direct-Fit, Standard-Volume","description":"\u003cp\u003e\u003cstrong\u003eThe Melling M55 Replacement Oil Pump is a cast-iron, internal wet-sump pump designed to restore reliable oil circulation in Small Block Chevy engines using standard-volume flow.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you are rebuilding a classic Small Block Chevrolet or replacing a worn unit during routine maintenance, the Melling M55 offers a direct-fit, vehicle-specific solution engineered for conventional oil systems. Built from durable cast iron and sized for standard-volume output, this pump is intended to match OE-style performance and durability without altering oil capacity or pressure characteristics.\u003c\/p\u003e\n\n\u003ch3\u003eWill this pump fit my Small Block Chevy engine?\u003c\/h3\u003e\n\u003cp\u003eThe M55 is produced as a vehicle-specific replacement for many Small Block Chevrolet engines; confirm fitment using your engine year, mounting pattern, and part number cross-reference. It replaces internal wet-sump pumps that use the same housing and drive orientation as the original equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits many Small Block Chevy applications — check compatibility chart or VIN-based fitment.\u003c\/li\u003e\n  \u003cli\u003eInternal, wet-sump design matches OE installation layout and clearances.\u003c\/li\u003e\n  \u003cli\u003eStandard-volume output avoids changing oil pressure or system capacity.\u003c\/li\u003e\n  \u003cli\u003eDirect-replacement shape and bolt pattern simplifies installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is the Melling M55 built and what materials are used?\u003c\/h3\u003e\n\u003cp\u003eConstructed with a cast iron housing, the pump prioritizes strength and wear resistance in the rotating assembly and body. Melling designs its pumps to use proven internal gear and rotor geometry so lubrication performance follows original specifications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCast-iron housing for longevity and resistance to deformation.\u003c\/li\u003e\n  \u003cli\u003eInternal wet-sump mechanism compatible with conventional oil pans.\u003c\/li\u003e\n  \u003cli\u003eStandard-volume configuration to maintain factory oil flow.\u003c\/li\u003e\n  \u003cli\u003eNo gasket or seal included — permits use of OEM or upgraded seals during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows standard procedures for replacing an internal oil pump on a Small Block Chevy: drain oil, remove pan and pickup, swap the pump, then reinstall components and refill. Because the M55 ships without gaskets or seals, plan to source a compatible front cover gasket or seal kit to ensure a leak-free seal.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires oil pan and pickup removal for access to the pump.\u003c\/li\u003e\n  \u003cli\u003eVerify drive shaft engagement and torque fasteners to factory specs.\u003c\/li\u003e\n  \u003cli\u003eUse proper gasket or seal (sold separately) to prevent leaks.\u003c\/li\u003e\n  \u003cli\u003ePrime the pump or crank engine prior to initial start to avoid dry start wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for?\u003c\/p\u003e\n\u003cp\u003eThe Melling M55 Replacement Oil Pump is aimed at mechanics, hobbyists, and restoration specialists working on Small Block Chevy engines who need a dependable, standard-volume replacement. It’s suitable for owners restoring a classic engine to stock-like operation, shops performing routine service, and anyone who prefers a cast-iron, OE-style pump built for long-term use. Note that seals and gaskets are not included, so plan accordingly when ordering parts for installation.\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: Does the Melling M55 include gaskets or seals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The M55 ships without gaskets or seals; purchase the correct front cover gasket or seal kit separately for installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the M55 a high-volume pump?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The M55 is a standard-volume, OE-style oil pump designed to match factory flow for Small Block Chevy engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Melling","offers":[{"title":"Default Title","offer_id":67586801074361,"sku":"B000C4NPHO","price":115.86,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/melling-m55-front-view-pump.jpg?v=1790493346","url":"https:\/\/redleafauto.ca\/products\/melling-replacement-oil-pump-m55-for-small-block-chevy-cast-iron-direct-fit-standard-volume","provider":"Redleaf Auto","version":"1.0","type":"link"}