{"product_id":"o-ring-fiat-jeep-dodge-1-4l-turbo-oil-separator-pcv-oring-cover-seal-improved-✅","title":"O-Ring Fiat Jeep Dodge 1.4L Turbo Oil Separator PCV ORing Cover Seal Improved","description":"\u003cp class=\"p1\"\u003eReplacing the O-ring cover seal for the air\/oil separator (AOS) and PCV valve on a Fiat 500 Abarth with a 1.4L Turbo engine is a straightforward task that addresses common oil leaks, particularly around cylinders 3 and 4, which can lead to misfires or reduced performance. This guide applies to the Fiat 500 Abarth (2012-2019) and similar 1.4L MultiAir Turbo models (e.g., Fiat 500L, 500X, 124 Spider, Jeep Renegade, Dodge Dart). The O-ring often degrades over time, causing oil seepage, and should be serviced every 30,000 miles or if leaks are detected.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eTools and Materials Needed\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eO-Ring Seal\u003c\/b\u003e: Mopar part #04893446AB (improved, rounded design) or high-quality Viton O-ring\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eTools\u003c\/b\u003e: 10mm socket\/wrench, 23mm socket (for PCV valve), flathead screwdriver, pliers (for hose clamps), torque wrench.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eCleaning Supplies\u003c\/b\u003e: Brake cleaner or degreaser, clean rags, spray cleaner for AOS.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eOther\u003c\/b\u003e: 15.3-18.5mm hose clamp (if replacing), jack and jack stands (if accessing from below), gloves, safety glasses.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eReplacement Fluid\u003c\/b\u003e: 5W-40 synthetic oil (if topping off due to leaks).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p2\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eStep-by-Step Replacement Guide\u003c\/b\u003e\u003c\/p\u003e\n\u003col class=\"ol1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eSafety Precautions\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003ePark the vehicle on a flat surface, engage the parking brake, and disconnect the negative battery terminal to avoid electrical issues.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eWork on a cold engine to prevent burns.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eWear gloves and safety glasses to protect against oil and debris.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eLocate the Air\/Oil Separator (AOS)\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eThe AOS is a black box mounted on the valve cover, near the turbo and spark plugs, connected by hoses to the PCV system.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eRefer to a service manual or YouTube videos (e.g., “Fiat 500 Abarth Oil Separator Replacement”) for precise location.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003ePrepare the Work Area\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003ePlace a drain pan under the engine to catch any oil drips.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eClean the AOS and valve cover area with degreaser to prevent contamination.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eRemove the AOS\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eDisconnect the hoses attached to the AOS:\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eLoosen the hose clamps (15.3-18.5mm) using pliers or a screwdriver. Note the crimp clamp may need careful removal or replacement with a standard clamp.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eDetach the hose with the blue clip (if present) using pincers or a flathead screwdriver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eRemove the three 10mm bolts securing the AOS to the valve cover.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eGently pull the AOS upward to detach it. Note the oil return tube at the bottom, which may require wiggling to free. Avoid forcing it to prevent damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eReplace the O-Ring Seal\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eLocate the O-ring on the AOS where it seals against the valve cover or crankcase breather “nipple.” It’s a common leak point, often causing oil to seep onto the valve cover or spark plugs.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eCarefully remove the old O-ring using a flathead screwdriver or pick, avoiding damage to the sealing surface.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eClean the O-ring groove and mating surfaces with brake cleaner and rags to remove oil and debris.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eInstall the new O-ring. Lightly lubricate with clean 5W-40 oil to ensure a proper seal and prevent twisting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eOptional: Replace or Clean the PCV Valve\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eIf replacing the PCV valve, use a 23mm socket to unscrew the old valve from the AOS.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eCheck the old PCV valve by shaking it; it should rattle freely. If stuck, replace it with Mopar #4893073AA or Duralast PCV1010DL.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eClean the AOS interior with spray cleaner (e.g., brake cleaner) to remove oil gunk, which can affect performance and fuel economy. Dry thoroughly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eReinstall the AOS\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eReattach the AOS to the valve cover, ensuring the new O-ring is properly seated.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eTighten the three 10mm bolts to the manufacturer’s torque specs (consult a service manual, typically ~8-10 Nm).\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eReconnect the hoses, securing them with clamps. If the original crimp clamp was damaged, use a new 15.3-18.5mm clamp.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eEnsure the oil return tube is properly aligned and snug (no pressure is applied, so clamps are optional).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eCheck and Top Off Oil\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eCheck the engine oil level on the dipstick after a 5-minute rest. Add 5W-40 synthetic oil if low due to prior leaks.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eInspect spark plug wells (especially cylinders 3 and 4) for oil contamination, which could cause misfires. Clean or replace plugs if needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eTest the System\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eReconnect the battery and start the engine.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eCheck for oil leaks around the AOS and valve cover. Smell for burning oil, which may indicate a poor seal.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eDrive the vehicle and monitor for smooth operation, improved fuel economy (e.g., 27-30 MPG average), and absence of misfires or “bucking” during acceleration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli class=\"li1\"\u003e\n\u003cb\u003eFinal Checks\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eRecheck oil levels after a short drive and top off if necessary.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eMonitor the valve cover and spark plug area for recurring leaks over the next few days.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003eDispose of old oil and rags properly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ol\u003e\n\u003cp class=\"p2\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eTips and Warnings\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eUse Viton O-Rings\u003c\/b\u003e: Viton is heat- and oil-resistant, unlike the stock nitrile O-ring, which degrades faster. The Mopar #04893446AB is an improved, rounded design.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eService Interval\u003c\/b\u003e: Perform this maintenance every 30,000 miles or if oil is found on the valve cover or spark plugs.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003ePCV Valve Check\u003c\/b\u003e: A stuck PCV valve can increase oil consumption or cause blowby. Replace it if it doesn’t rattle.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eOil Leaks and Misfires\u003c\/b\u003e: Leaking O-rings can fill spark plug wells, causing misfires. Check coils and plugs if you notice performance issues.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eCost Savings\u003c\/b\u003e: O-rings cost a few bucks, and PCV valves are $12.50, much cheaper than a new AOS ($236).\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eVideo Guidance\u003c\/b\u003e: Watch tutorials like “Fiat 500 Abarth Oil Separator Replacement” on YouTube for visual steps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eTroubleshooting\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003ePersistent Leaks\u003c\/b\u003e: Ensure the O-ring is properly seated and surfaces are clean. Check hoses for cracks or loose clamps.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003ePoor Performance\u003c\/b\u003e: A clogged AOS or stuck PCV valve can cause bucking or low MPG. Clean the AOS thoroughly or replace the valve.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eBurning Oil Smell\u003c\/b\u003e: Indicates a leak onto hot engine components. Recheck the O-ring and hose connections.\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003c\/span\u003e\u003cb\u003eMisfires\u003c\/b\u003e: Oil in spark plug wells (cylinders 3\/4) suggests a failed O-ring. Clean wells and replace plugs\/coils if damaged.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"The Frugal Fixer","offers":[{"title":"Default Title","offer_id":53189477728621,"sku":null,"price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0992\/3362\/8525\/files\/Screenshot2026-04-09at10.49.38AM.png?v=1775757146","url":"https:\/\/thefrugalfixer.com\/products\/o-ring-fiat-jeep-dodge-1-4l-turbo-oil-separator-pcv-oring-cover-seal-improved-%e2%9c%85","provider":"The Frugal Fixer","version":"1.0","type":"link"}