{"product_id":"bmw-e23-745i-turbo-cylinder-head-m106-m30-1288086","title":"BMW E23 745i Turbo Cylinder Head – M106 \/ M30 1288086","description":"\u003cp\u003eFor sale is an \u003cstrong data-start=\"162\" data-end=\"198\"\u003eoriginal BMW turbo cylinder head\u003c\/strong\u003e for the \u003cstrong data-start=\"207\" data-end=\"223\"\u003eBMW E23 745i\u003c\/strong\u003e, based on the legendary \u003cstrong data-start=\"248\" data-end=\"275\"\u003eM30 engine architecture\u003c\/strong\u003e and specifically developed for the \u003cstrong data-start=\"311\" data-end=\"332\"\u003eM106 turbo engine\u003c\/strong\u003e. These original turbo heads are \u003cstrong data-start=\"365\" data-end=\"378\"\u003every rare\u003c\/strong\u003e and increasingly difficult to find in usable condition.\u003c\/p\u003e\n\u003cp\u003eThis is a \u003cstrong data-start=\"446\" data-end=\"486\"\u003eused cylinder head in good condition\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"489\" data-end=\"492\"\u003e\n\u003ch3 data-start=\"494\" data-end=\"517\"\u003eGeneral Information\u003c\/h3\u003e\n\u003cul data-start=\"518\" data-end=\"752\"\u003e\n\u003cli data-start=\"518\" data-end=\"536\"\u003eBrand: BMW (OEM)\u003c\/li\u003e\n\u003cli data-start=\"537\" data-end=\"569\"\u003eEngine: M106 Turbo \/ M30-based\u003c\/li\u003e\n\u003cli data-start=\"570\" data-end=\"591\"\u003eBMW Model: E23 745i\u003c\/li\u003e\n\u003cli data-start=\"592\" data-end=\"632\"\u003eBMW Part Number \/ Casting: \u003cstrong data-start=\"621\" data-end=\"632\"\u003e1288086\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"633\" data-end=\"666\"\u003eCondition: Used, good condition\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"731\" data-end=\"752\"\u003eMaterial: Cast iron\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"754\" data-end=\"757\"\u003e\n\u003ch3 data-start=\"759\" data-end=\"793\"\u003eTurbo-Specific Features (M106)\u003c\/h3\u003e\n\u003cp\u003eThis cylinder head is based on a standard M30 head but includes important turbo-specific upgrades:\u003c\/p\u003e\n\u003cul data-start=\"894\" data-end=\"1260\"\u003e\n\u003cli data-start=\"894\" data-end=\"928\"\u003eSpecial exhaust manifold studs\u003c\/li\u003e\n\u003cli data-start=\"929\" data-end=\"1023\"\u003e\n\u003cstrong data-start=\"931\" data-end=\"967\"\u003eNimonic exhaust valves and seats\u003c\/strong\u003e (high wear resistance for extreme turbo temperatures)\u003c\/li\u003e\n\u003cli data-start=\"1024\" data-end=\"1058\"\u003eUnique intake valves and seats\u003c\/li\u003e\n\u003cli data-start=\"1059\" data-end=\"1134\"\u003eInjector specification: \u003cstrong data-start=\"1085\" data-end=\"1109\"\u003e271 cc\/min injectors\u003c\/strong\u003e on the intake manifold\u003c\/li\u003e\n\u003cli data-start=\"1135\" data-end=\"1209\"\u003eSmaller water channels compared to NA M30 heads for increased rigidity\u003c\/li\u003e\n\u003cli data-start=\"1210\" data-end=\"1260\"\u003eRough (non-polished) intake ports from factory\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese features provide \u003cstrong data-start=\"1285\" data-end=\"1322\"\u003esignificantly improved durability\u003c\/strong\u003e compared to a standard M30 cylinder head when used in turbo applications.\u003c\/p\u003e\n\u003chr data-start=\"1398\" data-end=\"1401\"\u003e\n\u003ch3 data-start=\"1403\" data-end=\"1441\"\u003eShared Components with M30 Engines\u003c\/h3\u003e\n\u003cp\u003eThe following parts are interchangeable with standard M30 engines:\u003c\/p\u003e\n\u003cul data-start=\"1510\" data-end=\"1709\"\u003e\n\u003cli data-start=\"1510\" data-end=\"1562\"\u003eCamshaft: \u003cstrong data-start=\"1522\" data-end=\"1560\"\u003e264 degrees (M30B35 specification)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1563\" data-end=\"1596\"\u003eRocker arms and rocker shafts\u003c\/li\u003e\n\u003cli data-start=\"1597\" data-end=\"1631\"\u003eValve guides and valve springs\u003c\/li\u003e\n\u003cli data-start=\"1632\" data-end=\"1678\"\u003eCamshaft gear, timing chain, and tensioner\u003c\/li\u003e\n\u003cli data-start=\"1679\" data-end=\"1709\"\u003eHead gasket: \u003cstrong data-start=\"1694\" data-end=\"1709\"\u003eM30B35 type\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLate M30B34 heads (including some E28 applications) also share the \u003cstrong data-start=\"1778\" data-end=\"1805\"\u003edual valve spring setup\u003c\/strong\u003e, improving valvetrain stability.\u003c\/p\u003e\n\u003chr data-start=\"1840\" data-end=\"1843\"\u003e\n\u003ch3 data-start=\"1845\" data-end=\"1888\"\u003eTechnical Notes \u0026amp; Important Information\u003c\/h3\u003e\n\u003cul data-start=\"1889\" data-end=\"2447\"\u003e\n\u003cli data-start=\"1889\" data-end=\"1963\"\u003eNimonic exhaust valves are designed for \u003cstrong data-start=\"1931\" data-end=\"1961\"\u003ehigh-temperature turbo use\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1964\" data-end=\"2046\"\u003eA standard M30 head can be used as a substitute, but with \u003cstrong data-start=\"2024\" data-end=\"2044\"\u003ereduced lifespan\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2047\" data-end=\"2141\"\u003eWhen resurfacing the head multiple times, a \u003cstrong data-start=\"2093\" data-end=\"2123\"\u003e2.0 mm thicker head gasket\u003c\/strong\u003e may be required\u003c\/li\u003e\n\u003cli data-start=\"2142\" data-end=\"2232\"\u003ePiston-to-valve clearance should always be verified (modeling clay method recommended)\u003c\/li\u003e\n\u003cli data-start=\"2233\" data-end=\"2339\"\u003eAlways inspect for \u003cstrong data-start=\"2254\" data-end=\"2273\"\u003ehairline cracks\u003c\/strong\u003e, commonly found between the exhaust valve seat and water jacket\u003c\/li\u003e\n\u003cli data-start=\"2340\" data-end=\"2447\"\u003eThese turbo heads offer a \u003cstrong data-start=\"2368\" data-end=\"2392\"\u003edurability advantage\u003c\/strong\u003e over stock M30 heads, especially on the exhaust side\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2449\" data-end=\"2452\"\u003e\n\u003ch3 data-start=\"2454\" data-end=\"2488\"\u003eExhaust Manifold Compatibility\u003c\/h3\u003e\n\u003cul data-start=\"2489\" data-end=\"2909\"\u003e\n\u003cli data-start=\"2489\" data-end=\"2590\"\u003eOriginal M106 turbo exhaust manifold is a \u003cstrong data-start=\"2533\" data-end=\"2563\"\u003etwo-piece log-style design\u003c\/strong\u003e, unique to turbo engines\u003c\/li\u003e\n\u003cli data-start=\"2591\" data-end=\"2668\"\u003eCan be fitted to M30 heads with re-tapped threads (deeper bores required)\u003c\/li\u003e\n\u003cli data-start=\"2669\" data-end=\"2724\"\u003eCracks on the turbo side of the manifold are common\u003c\/li\u003e\n\u003cli data-start=\"2725\" data-end=\"2801\"\u003eWastegate may seize over time; soaking in thin oil usually resolves this\u003c\/li\u003e\n\u003cli data-start=\"2802\" data-end=\"2909\"\u003eExhaust manifold should be \u003cstrong data-start=\"2831\" data-end=\"2860\"\u003ere-torqued after break-in\u003c\/strong\u003e when installed on a new head or with new studs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2911\" data-end=\"2914\"\u003e\n\u003ch3 data-start=\"2916\" data-end=\"2966\"\u003eValve-to-Piston Clearance Reference (Measured)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong data-start=\"2967\" data-end=\"2993\"\u003eIntake clearance (mm):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2994\" data-end=\"3113\"\u003e\n\u003cli data-start=\"2994\" data-end=\"3013\"\u003eCyl 1: 2.6 (+0.3)\u003c\/li\u003e\n\u003cli data-start=\"3014\" data-end=\"3033\"\u003eCyl 2: 2.5 (+0.2)\u003c\/li\u003e\n\u003cli data-start=\"3034\" data-end=\"3053\"\u003eCyl 3: 2.6 (+0.3)\u003c\/li\u003e\n\u003cli data-start=\"3054\" data-end=\"3073\"\u003eCyl 4: 3.3 (+1.0)\u003c\/li\u003e\n\u003cli data-start=\"3074\" data-end=\"3093\"\u003eCyl 5: 2.5 (+0.2)\u003c\/li\u003e\n\u003cli data-start=\"3094\" data-end=\"3113\"\u003eCyl 6: 2.6 (+0.3)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong data-start=\"3115\" data-end=\"3142\"\u003eExhaust clearance (mm):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"3143\" data-end=\"3262\"\u003e\n\u003cli data-start=\"3143\" data-end=\"3162\"\u003eCyl 1: 4.3 (+1.5)\u003c\/li\u003e\n\u003cli data-start=\"3163\" data-end=\"3182\"\u003eCyl 2: 5.5 (+2.7)\u003c\/li\u003e\n\u003cli data-start=\"3183\" data-end=\"3202\"\u003eCyl 3: 5.2 (+2.4)\u003c\/li\u003e\n\u003cli data-start=\"3203\" data-end=\"3222\"\u003eCyl 4: 4.4 (+1.6)\u003c\/li\u003e\n\u003cli data-start=\"3223\" data-end=\"3242\"\u003eCyl 5: 4.9 (+2.1)\u003c\/li\u003e\n\u003cli data-start=\"3243\" data-end=\"3262\"\u003eCyl 6: 4.3 (+1.5)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3264\" data-end=\"3267\"\u003e\n\u003ch3 data-start=\"3269\" data-end=\"3280\"\u003eSummary\u003c\/h3\u003e\n\u003cul data-start=\"3281\" data-end=\"3507\"\u003e\n\u003cli data-start=\"3281\" data-end=\"3329\"\u003eRare \u003cstrong data-start=\"3288\" data-end=\"3329\"\u003eoriginal BMW M106 turbo cylinder head\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3330\" data-end=\"3359\"\u003eCorrect casting \u003cstrong data-start=\"3348\" data-end=\"3359\"\u003e1288086\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3360\" data-end=\"3409\"\u003eTurbo-specific upgrades over standard M30 heads\u003c\/li\u003e\n\u003cli data-start=\"3410\" data-end=\"3438\"\u003eUsed but in good condition\u003c\/li\u003e\n\u003cli data-start=\"3439\" data-end=\"3507\"\u003eIdeal for \u003cstrong data-start=\"3451\" data-end=\"3479\"\u003eBMW E23 745i restoration\u003c\/strong\u003e or serious turbo M30 builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWorldwide shipping possible.\u003cbr data-start=\"3537\" data-end=\"3540\"\u003ePlease feel free to contact us if you need additional photos, measurements, or technical clarification.\u003c\/p\u003e","brand":"Tayushi","offers":[{"title":"Default Title","offer_id":56467088572791,"sku":null,"price":350.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/3704\/2551\/files\/DAE207EC-09CA-4681-AA39-452AC9FCF32C_1_102_o.jpg?v=1767604397","url":"https:\/\/www.tayushi.com\/products\/bmw-e23-745i-turbo-cylinder-head-m106-m30-1288086","provider":"Tayushi","version":"1.0","type":"link"}