{"product_id":"pai-631265-detroit-dd15-head-gasket","title":"PAI 631265 | Detroit DD15 Cylinder Head Gasket","description":"\u003ch2\u003ePAI 631265 Detroit DD15 Cylinder Head Gasket\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ePAI 631265 Cylinder Head Gasket\u003c\/strong\u003e is a replacement head gasket designed for \u003cstrong\u003eDetroit Diesel DD15\u003c\/strong\u003e engines. This gasket seals the cylinder head to the engine block to help maintain proper compression while preventing the mixing or leakage of engine oil, coolant, and combustion gases.\u003c\/p\u003e\n\n\u003cp\u003ePAI 631265 replaces Detroit Diesel OEM \u003cstrong\u003eA4720161820\u003c\/strong\u003e and is also cross-referenced to \u003cstrong\u003eA4720162220\u003c\/strong\u003e. It is used as the head gasket component in the PAI 631375 DD15 head gasket set.\u003c\/p\u003e\n\n\u003ch2\u003ePAI 631265 Head Gasket Specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e PAI Industries\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePAI Part Number:\u003c\/strong\u003e 631265\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Cylinder Head Gasket\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Detroit Diesel DD15\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Reference:\u003c\/strong\u003e A4720161820\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdditional OEM Reference:\u003c\/strong\u003e A4720162220\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Heavy-Duty Diesel Engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOEM \u0026amp; Cross Reference Numbers\u003c\/h2\u003e\n\n\u003cp\u003ePAI 631265 is cross-referenced to the following Detroit Diesel and aftermarket numbers:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetroit Diesel:\u003c\/strong\u003e A4720161820\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetroit Diesel:\u003c\/strong\u003e A4720162220\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetroit Diesel:\u003c\/strong\u003e A4720161520\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterstate-McBee:\u003c\/strong\u003e A-A4720161520\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterstate-McBee:\u003c\/strong\u003e A-A4720161820\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterstate-McBee:\u003c\/strong\u003e A-A4720162220\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePAI:\u003c\/strong\u003e 631265E\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eCross-reference numbers are provided for identification and compatibility purposes. Always verify the exact OEM part number and engine configuration before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eDetroit DD15 Head Gasket Replacement\u003c\/h2\u003e\n\n\u003cp\u003eThe cylinder head gasket is a critical sealing component between the DD15 cylinder head and engine block. It must maintain sealing around the combustion chambers, coolant passages, and oil passages while withstanding the heat and pressure generated by the engine.\u003c\/p\u003e\n\n\u003cp\u003eA compromised head gasket can contribute to coolant loss, oil and coolant contamination, combustion-gas leakage, loss of compression, or other engine performance problems. Replacing the gasket requires proper cylinder-head inspection, surface preparation, torque procedures, and installation according to applicable Detroit service specifications.\u003c\/p\u003e\n\n\u003ch2\u003ePAI 631265 vs. DD15 Head Gasket Set\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePAI 631265\u003c\/strong\u003e is the individual cylinder head gasket. It is also included as a component of the \u003cstrong\u003ePAI 631375\u003c\/strong\u003e DD15 head gasket set, which includes additional gaskets and components required for a more complete upper-engine repair.\u003c\/p\u003e\n\n\u003cp\u003eIf you are performing a complete DD15 head-gasket repair or engine rebuild, verify whether you need the individual \u003cstrong\u003e631265 head gasket\u003c\/strong\u003e or the complete \u003cstrong\u003e631375 head gasket set\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eDD15 Fitment Verification\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Detroit DD15 engines use multiple head-gasket and gasket-set configurations. Verify the OEM part number, VIN, and\/or engine serial number (ESN) before ordering.\u003c\/p\u003e\n\n\u003cp\u003ePAI 631265 is specifically cross-referenced to Detroit Diesel A4720161820 and A4720162220. Do not assume that every DD15 engine uses the same head gasket without confirming the engine configuration.\u003c\/p\u003e\n\n\u003ch2\u003ePAI 631265 Warranty\u003c\/h2\u003e\n\n\u003cp\u003ePAI lists the standard Genuine PAI version with a \u003cstrong\u003e2-year unlimited-mileage warranty\u003c\/strong\u003e. The related 631265E Excel by PAI version carries different warranty coverage, so verify the exact PAI part suffix when ordering.\u003c\/p\u003e","brand":"PAI Industries","offers":[{"title":"Default Title","offer_id":67011693609005,"sku":null,"price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/4526\/0845\/files\/A4720161820.jpg?v=1789795183","url":"https:\/\/performancedieselgroup.com\/products\/pai-631265-detroit-dd15-head-gasket","provider":"Performance Diesel Group","version":"1.0","type":"link"}