{"product_id":"cometic-toyota-2jz-ge-2jz-gte-rear-main-seal","title":"Cometic Rear Main Seal | Toyota 2JZ-GE \/ 2JZ-GTE | Crankshaft Seal | Supra \/ Aristo \/ IS300 | C4853","description":"\u003ch2\u003eCometic Rear Main Seal – Toyota 2JZ-GE \/ 2JZ-GTE | High-Performance PTFE Crankshaft Seal | C4853\u003c\/h2\u003e\n\u003cp\u003eReplace the factory rear main seal on your Toyota 2JZ-GE or 2JZ-GTE with the Cometic high-performance rear main seal — engineered for the demands of performance and boosted 2JZ applications where the OEM rubber seal falls short. The rear main seal is the crankshaft seal at the rear of the engine block, sealing the crankshaft where it exits toward the flywheel or flexplate. On high-power 2JZ builds — particularly turbocharged and high-boost applications — elevated crankcase pressure accelerates rear main seal wear and failure, making a high-performance replacement seal a critical component in any serious 2JZ engine build or rebuild.\u003c\/p\u003e\n\u003ch3\u003e2JZ-GE vs. 2JZ-GTE – Same Seal\u003c\/h3\u003e\n\u003cp\u003eThe Cometic CGSC4853 fits both the \u003cstrong\u003e2JZ-GE\u003c\/strong\u003e (naturally aspirated) and \u003cstrong\u003e2JZ-GTE\u003c\/strong\u003e (twin-turbocharged) variants of Toyota’s 2JZ inline-six — the rear crankshaft seal dimensions are shared across both engine variants. Verify your engine code before ordering if unsure.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePTFE Lip Seal Material:\u003c\/strong\u003e Cometic uses PTFE (polytetrafluoroethylene) for the seal lip — a chemically inert, heat-resistant material that outperforms the OEM rubber seal in high-temperature and high-pressure crankcase environments. PTFE is resistant to oil degradation, heat cycling, and the elevated crankcase pressures common in boosted and high-RPM 2JZ applications. The PTFE lip maintains its sealing integrity over a wider temperature range and longer service life than OEM rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance and Boosted Application Rated:\u003c\/strong\u003e The Cometic rear main seal is specifically engineered for performance and racing engine applications — where elevated boost pressure, high RPM, and aggressive oil temperatures accelerate wear on OEM seals. Suitable for naturally aspirated, single-turbo, and twin-turbo 2JZ builds across all power levels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Replacement Dimensions:\u003c\/strong\u003e The CGSC4853 is dimensioned to replace the factory Toyota rear main seal directly — no machining or modification to the block or crankshaft required. Installs in the factory seal bore using standard seal installation tools\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCometic Quality:\u003c\/strong\u003e Cometic Gasket is a leading manufacturer of high-performance engine sealing products — supplying OEM, motorsport, and aftermarket applications globally. Cometic products are manufactured to precise dimensional tolerances with high-quality materials selected for each specific application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace the Rear Main Seal\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOil leak at the rear of the engine block \/ front of the transmission bell housing\u003c\/li\u003e\n\u003cli\u003eOil on the flywheel, clutch, or flexplate\u003c\/li\u003e\n\u003cli\u003eDuring any engine rebuild or bottom-end refresh — replace as a matter of course\u003c\/li\u003e\n\u003cli\u003eWhen upgrading to a high-power build where elevated crankcase pressure will accelerate OEM seal wear\u003c\/li\u003e\n\u003cli\u003eWhen installing a new or rebuilt crankshaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eToyota Supra A80 — 2JZ-GE NA (1993–1998)\u003c\/li\u003e\n\u003cli\u003eToyota Supra A80 — 2JZ-GTE Twin Turbo (1993–1998)\u003c\/li\u003e\n\u003cli\u003eToyota Aristo — 2JZ-GE \/ 2JZ-GTE (1991–2004)\u003c\/li\u003e\n\u003cli\u003eLexus IS300 — 2JZ-GE (2001–2005)\u003c\/li\u003e\n\u003cli\u003eLexus GS300 — 2JZ-GE (1993–2005)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Cometic Gasket\u003c\/li\u003e\n\u003cli\u003ePart Number: C4853\u003c\/li\u003e\n\u003cli\u003eComponent: Rear Main Crankshaft Seal\u003c\/li\u003e\n\u003cli\u003eMaterial: PTFE Lip Seal\u003c\/li\u003e\n\u003cli\u003eFitment: Toyota 2JZ-GE \/ 2JZ-GTE\u003c\/li\u003e\n\u003cli\u003eInstallation: Direct OEM Replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Replace the rear main seal any time the engine is apart — it is a low-cost insurance item that is expensive to access after assembly. Ensure the crankshaft seal journal surface is clean, smooth, and free of scoring before installing the new seal — a damaged journal surface will cause premature seal failure regardless of seal quality. Use a proper seal installation tool to avoid cocking or damaging the seal during installation. Do not use a screwdriver or improvised tool to install the seal.\u003c\/p\u003e","brand":"Cometic Gasket","offers":[{"title":"Default Title","offer_id":51261949149351,"sku":"CGSC4853","price":18.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/8344\/1063\/files\/Cometic_C4853.jpg?v=1787761104","url":"https:\/\/www.straightsiximports.com\/en-us\/products\/cometic-toyota-2jz-ge-2jz-gte-rear-main-seal","provider":"Straight Six Imports","version":"1.0","type":"link"}