{"product_id":"porsche-arp-204-5406-porsche-911-3-6-3-8-964-993-crankcase-thru-bolt-kit-204-5406-4","title":"Porsche ARP 204-5406 Porsche 911 3.6 3.8 964 \u0026 993 Crankcase Thru-Bolt Kit  204-5406","description":"\u003cp\u003ePorsche \u003cspan data-mce-fragment=\"1\"\u003eARP Porsche 911 964\/993 Crankcase Thru-Bolt Kit. Fits all 3.6 and 3.8 liter Porsche engines from 1989-1998.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eINSTALLATION METHOD FOR PORSCHE CRANKCASE THRU-BOLT KITS\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePart Number: 204-5406 Application: 3.6L \u0026amp; 3.8L air cooled engines\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eNote: The O-rings required to seal the crankcase thru-bolt holes (indicated in steps 7 and 8) are available from\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePorsche and many aftermarket suppliers and are typically supplied in most engine gasket kits. Also note that this\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eis a Universal kit that fits all 3.6L \u0026amp; 3.8L engines produced from 1989-98. Early model engines typically use two\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eM11X M10 studs on the No.1 main bearing journal and later model engines typically use two M10 bolts on the No.1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003emain bearing journal. Depending on the model year of your crankcase you will either install two M11 studs into\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ethe left hand case on the No.1 main bearing journal before you assemble the crankcase halves or install two M10\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ebolts through the right hand case after the crankcase halves have been assembled. Please check and verify the\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ethread sizes of the fasteners on the No.1 main bearing journal prior to assembling the crankcase halves.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the engine case.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eChase the threads if necessary with ARP Thread Chaser(s), part number 912-0005 (M11 X 1.5) or 912-0003\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e(M10 x 1.5).\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eproper fit, length and dimension.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e3. On early model engines, install two 6.973 in. long (M11x M10) studs into the left hand case on the No.1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003emain bearing journal.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e4. On all engines, install one 4.553 in. long stud into the lower hole of the right hand case on the No.7 main\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ebearing journal.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e5. Screw the studs into engine case \"HAND TIGHT ONLY\". Note: Loctite may be used if permanent\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003emounting of the stud is preferred.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e6. Assemble the case halves as described in the Porsche Factory Service Manual. Check for binding or\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003emisalignment.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e7. a) On early model engines, working from the side of the right hand case, install one O-ring over each of the\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003estuds on the No.1 main bearing journal. Then install a stepped washer onto each of the studs on the\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eNo.1 main bearing journal making sure the large O.D. on the washer faces the nut.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eb) On later model engines, it will be necessary to install one stepped washer and one O-ring on the\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eend of two 6.170 long (M 10) bolts and slide them up to the bolt heads. Then apply a liberal amount of\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eanti-seize compound to the bolt threads and install the bolts through the right hand case on the No.1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003emain bearing journal.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e8. Assemble the thru-bolts as follows:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ea) Install a stepped washer onto each thru-bolt and slide it up to the bolt head. The washers must be\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003epositioned on the bolt so that the large O.D. on the washer faces the bolt head. Install one O-ring over\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eeach bolt and position it up against the washer.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eb) Install the eleven thru-bolts into position through the right hand case.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ec) Working from the side of the left hand case, install one O-ring over the end of each thru-bolt. Be sure\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eto push the O-rings up against the engine case. Then install a stepped washer over the end of each\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ethru-bolt making sure the large O.D. on the washer faces the nut.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e9. Lubricate the stud threads, bolt threads and nuts with Permatex 133A Anti Seize compound. DO NOT\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eUSE ANY OTHER THREAD LUBRICANT AS GALLING MAY OCCUR.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e10. Install the standard (black oxide) 12 pt nut and washer onto the 4.553 in. long stud of the No.7 main bearing\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ejournal through the opening in the chain housing on the left hand case.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e11. Install the nuts onto the eleven thru-bolts. On early models install two nuts on the studs securing the No.1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003emain bearing journal. Tighten the nuts hand tight.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePRELOAD {TORQUE) RECOMMENDATIONS\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTorque values are based on 75% of the fasteners yield strength\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e12. Following the manufacturers recommended torque sequence, tighten the nuts to 37 ft lbs with Permatex\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e133A Anti Seize compound.\u003c\/span\u003e\u003c\/p\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":40157835460666,"sku":"204-5406","price":1331.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/4846\/2650\/files\/Porsche-ARP-204-5406-Porsche-911-3-6-3-8-964-993-C-0.png?v=1747782495","url":"https:\/\/sierramadrecollection.com\/products\/porsche-arp-204-5406-porsche-911-3-6-3-8-964-993-crankcase-thru-bolt-kit-204-5406-4","provider":"Sierra Madre Collection","version":"1.0","type":"link"}