2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 105Get this manual
ENGINE 10Apply clean engine oil liberally to the cylinder bore and tapered area of the sleeveInstall the cylinder with slight rocking motion until the rings are captive in the sleeveThe following procedure must be used to torque the cylinder head properly: Torque all bolts evenly in criss- cross pattern Torque bolts to 22 ftlbs(30 Nm) Torque bolts to 51 ftlbs(70 Nm) Loosen bolts evenly 180o (12 turn) Loosen bolts again another 180o (12 turn) Torque bolts to 11 ftlbs(15 Nm) From this point, tighten bolts evenly 90o (14 turn) Finally, tighten another 90o (14 turn) Install two mm bolts and torque to ftlbs(8 Nm) 11Remove the ring compressor and support block12Push the cylinder downward until fully seated on the base gasket13Apply light film of oil to the threads and flange surface of the cylinder mounting bolts14Install all four bolts finger tightRotate the engine and position the piston at BDCNOTE: If cam chain is installed, hold it up while rotating the engine to avoid damage to the chain, drive sprocket teeth, or tensioner blade15Tighten the cylinder bolts in three steps in criss cross pattern and torque to specifications16Install the two mm bolts and torque to specificationsCylinder Bolt Torque: 10 mm46 ftlbs(62 Nm) mmftlbs(8 Nm)