BMW 11311435416 Outlet Camshaft

BMW tool 11 3 260 will be required for this operation. Do not attempt to remove and reinstall the camshafts without the aid of this special tool, as expensive damage to the camshafts or bearings may result. Begin by removing the VANOS adjustment unit and the secondary liming chain, followed by the splined shaft and sleeve from the center of the exhaust camshaft sprocket. Unscrew the four bolts to remove the secondary chain tensioner, then take out the three screw-in pins from the exhaust sprocket, lifting the chain to remove the sprocket while noting its installation direction. Remove the crankshaft locking pin and carefully rotate the crankshaft 30 degrees counterclockwise to prevent accidental piston-to-valve contact, securing the primary timing chain to the cylinder head. If necessary, remove the three screw-in pins from the intake camshaft, along with the thrust washer and camshaft sensor wheel. Remove the template from the camshafts and unscrew the spark plugs from the cylinder head. Check the camshaft bearing caps for identification marks, which are numbered from the timing chain end of the engine, with the exhaust camshaft bearing caps marked A1 to A7 and the intake camshaft caps marked E1 to E7. Unscrew the four camshaft cover retaining studs, and as the intake camshaft No 1 bearing cap is located by adapter sleeves, unscrew the nuts and remove the cap to prevent binding during camshaft removal. Assemble BMW special tool 11 3 260 and mount it on the cylinder head, ensuring the plungers are over the relevant camshaft bearing caps. Apply force to the camshaft bearing caps by turning the eccentric shaft on the tool with a wrench, then unscrew the remaining camshaft bearing cap nuts, taking care not to do so without the special tools in place to avoid damage. Slowly turn the special tool shaft to release the force from the bearing caps, unbolt the tool, and lift off the bearing caps in order before removing the camshaft. The camshaft bearing casting can now be lifted from the cylinder head, ensuring the camshaft Lash Adjusters do not fall out and get mixed up, as they must be installed in their original locations. With the bearing casting removed, lift the camshaft Lash Adjusters from the cylinder head, identifying them for location and storing them upright in clean engine oil. Repeat the procedure on the remaining camshaft, marking the camshaft Lash Adjusters as Intake and Exhaust. Clean all components, including the bearing surfaces, and examine them for wear and damage, particularly the bearing and camshaft lobe surfaces for scoring and pitting, replacing components as necessary. If the camshaft lower bearing castings have been removed, ensure the mating faces are clean and that the bearing casting locating dowels are in position. Reinstall the bearing casting(s) and camshaft Lash Adjusters, ideally retaining the lifters in the bearing casting for assembly. Oil the bearing casting contact surfaces of the Lash Adjusters, avoiding oil on the top faces, then install each follower to its original location. Once all Lash Adjusters are installed, retain them in the bearing casting and reinstall the casting to the cylinder head, ensuring the exhaust side casting is marked A and the intake side casting is marked E, with marks facing each other at the timing chain end. To minimize the possibility of piston-to-valve contact, observe specified delays before turning the crankshaft back to the TDC position. Identify the camshafts to ensure correct installation, noting the triangular front flange of the intake camshaft and the circular front flange of the exhaust camshaft, while ensuring the crankshaft is still positioned at 30 degrees counterclockwise from TDC. Position the camshaft on the cylinder head, aligning the tips of the front camshaft lobes and ensuring the square flanges are at right angles to the top surface of the cylinder head. Place the bearing caps in position, noting their identification marks, and reinstall BMW special tool 11 3 260 to the cylinder head. Apply pressure to the bearing caps by turning the eccentric shaft on the tool with a wrench, then reinstall and tighten the bearing cap retaining nuts progressively in a diagonal sequence. Once tightened, unbolt the tool and repeat the procedure on the remaining camshaft. Reinstall the spark plugs and camshaft cover studs, then reinstall the special tool/camshaft holding fixture to check the camshaft positions, turning the camshaft slightly if necessary. Turn the crankshaft back 30 degrees clockwise to the TDC position, re-engaging the locking tool with the flywheel to lock the crankshaft in position, then reinstall the camshaft sprockets and timing chains, followed by the VANOS adjustment unit. To minimize the possibility of piston-to-valve contact after installing the camshaft(s), observe specified delays before cranking the engine.

Some of the camshafts and VANOS units require specific service tools to fit and adjust and this should be carefully studied prior to the operation. Correct phasing of cams is important so that the piston does not hit the valves and cause drastic problems to the engine. First, get rid of the negative cable from the battery and make sure you go through the battery disconnection cautionaries you came across earlier. The air filter housing and ducts must be taken out, and the electric cooling fan as well as the cooling fan shroud. Then remove the engine covers and cylinder head cover, and the spark plugs should be removed with the spark plug bores being plugged so as not to allow any debris to get into the engine. Go ahead and pull off the VANOS unit and the primary camshaft chain tensioner cylinder with reference to the fact that the chain tensioner piston of the unit still carries a spring force. Foray down on the secondary chain tensioner and use a special tool or a small pin or a thin drift to lock the tensioner down. Take out the exhaust camshaft impulse wheel mounting nuts and impulse wheel together with the spring plate. Next, take off the intake camshaft sprocket mounting nuts and the spring plate marked FRONT, and the Torx bolts the exhaust camshaft sprocket. Remove the exhaust and intake sprockets with the secondary chain thrust spacer and the splined shaft; be sure to align the splined shafts in order to reuse. , the exhaust camshaft splined sleeve and shaft, and the secondary chain tensioner mounting bolts, while the tensioner contains a retaining pin. Take out the sprocket mounting studs from the exhaust camshaft and lift the primary chain sprocket away from the exhaust camshaft and place the timing on the extremity of the exhaust camshaft. Located; Remove the locating studs from the intake camshaft and lift off the intake camshaft thrust spacer and impulse wheel, do NOT remove the Torx screws from the camshafts. Depress the cylinder head cover mounting studs from the centre of the cylinder head and the crankshaft locking tool. Pull the primary chain upwards and hold it with your hand and turn the engine with the wrench of the crankshaft vibration damper bolt in anticlockwise direction and rotate the engine up to 30 degrees to get the piston up from the T.D.C which will avoid piston to valve interference during the servicing of camshaft. Removal of the camshaft locking tools from the rear of the cylinder head as well as the intake camshaft bearing cap fasteners, and then, removal of the bearing cap separately observing that you do not remove the other caps 2-6 at the same time. Insert the special tools to the cylinder head and screw the long bolts into the spark plug threads making the tensioning pins of the tool engaged into the bearing caps at the camshaft, be careful not to over Tighten the bolts. Pretension the intake camshaft bearing caps by rotating the eccentric shaft of the special tool then pull off the remaining intake camshaft bearing cap bolts. Gradually loosen the tension on the eccentric shaft and then remove special tools while keeping the bearing caps under consideration set in order. Take out the camshaft and place it carefully aside, do the same for the exhaust camshaft. If the cylinder head is being removed, the hydraulic lifters will remain in their bores, best to secure them with a hydraulic lifters special or, if required use a magnetic pick-up tool. When the lifters are either secured or removed, carefully lift out the camshaft bearing carriers out of the cylinder head make sure the hydraulic lifters do not fall off and then put a mark on each one of them to show where they are to be reinstalled in their original bores; put the lifters in an upright position.

Before installing camshaft carriers, examine hydraulic lifter bore bearing points on the underside of camshaft carriers for signs of wear. Lubricate camshafts, camshaft carriers, bearing caps, hydraulic lifters, and friction washers with assembly lubricant. Center the camshaft carrier with hydraulic lifters on pins at bearing positions 2 and 7, noting marks on camshaft carriers: E for intake side and A for exhaust side. Lift the timing chain and place the exhaust camshaft on the exhaust camshaft carrier, followed by the intake camshaft on the intake camshaft carrier. Place bearing caps on camshafts and install retaining nuts finger tight, ensuring each bearing cap is marked E1 to E7 for intake and A1 to A7 for exhaust. Ensure the crankshaft, rotated approximately 30° opposite the direction of engine rotation from TDC, remains in that position. Fit BMW special tools 113260 and 113270 to the cylinder head and screw long bolts into spark plug threads, aligning tensioning pins on the tool with bearing caps on the intake camshaft. Rotate the eccentric shaft of the special tool to pretension bearing caps and torque bearing cap nuts, then release tension on the eccentric shaft and remove the special tools, repeating the procedure for the exhaust camshaft. A minimum waiting time is required for hydraulic lifters to bleed down before bringing the crankshaft and pistons back to TDC. When camshafts are removed, hydraulic lifters may expand, potentially causing increased valve lift when camshafts are bolted down, resulting in interference. Using a 27 mm open-end wrench, rotate the camshaft into position, grinding off outer edges of the wrench jaws if necessary to prevent damage to the cylinder head. Rotate camshafts until intake and exhaust lobes for cylinder 1 face each other, securing camshafts in TDC position using BMW camshaft TDC tools 113241 and locking down with special tool 113244 bolted to a spark plug bore. Lift the timing chain and hold under tension while using the crankshaft vibration damper bolt to rotate the crankshaft in the direction of rotation (clockwise) until cylinder 1 is at TDC position, ensuring OIT on the front pulley lines up with the boss on the lower timing chain cover. Secure the crankshaft in TDC position with BMW special tool 115180. Slide the impulse wheel on the intake camshaft, aligning the boss with the raised portion on the camshaft, and fit the thrust spacer to the intake camshaft, tightening down with threaded locating studs. Fit the primary sprocket to the primary timing chain and install it on the exhaust camshaft so that the pointer on the sprocket lines up with the cylinder head sealing surface. Insert BMW special tool 114220 into the timing chain tensioner bore and bring the center spindle into contact with the tensioning rail, tightening until slack is removed but not pretensioning the timing chain. Ensure the arrow on the upper primary sprocket still lines up with the upper edge of the cylinder head, repositioning the sprocket if necessary. Insert and tighten down threaded locating studs in the end of the exhaust camshaft, noting the installed position of the studs. Install the secondary chain tensioner on the cylinder head, keeping the tensioner compressed using BMW special tool 113291 or a suitable pin tool. Install the exhaust camshaft splined sleeve, confirming that the gap in sleeve splines aligns with the corresponding gap in camshaft splines. Slide the splined shaft on the exhaust camshaft, ensuring the locating tooth of the shaft fits into the spline gaps of the camshaft and splined sleeve, pushing the splined shaft in further to rotate the splined sleeve until three threaded holes in the primary chain sprocket are centered in the splined sleeve slots. Time intake to exhaust sprockets using BMW special tool 116180, positioning the spline gap on the intake sprocket as shown and placing the secondary chain on the sprockets. Remove the chain and sprockets from the tool and slide the sprockets on the camshafts, aligning the gap in the intake sprocket splines with the corresponding gap in the camshaft splines, ensuring not to alter the position of sprockets with respect to the chain when removing from special tool 116180. Slide the splined shaft onto the intake camshaft until approximately 1 mm of splines are visible, then install the intake camshaft spring plate so that the FRONT mark is visible, followed by installing mounting nuts finger tight. Insert sprocket mounting bolts on the exhaust side camshaft assembly, initially tightening to approximately 5 Nm and then backing off by half a turn. Fit the thrust spacer on the exhaust camshaft and install the spring plate to the exhaust camshaft, ensuring that the F mark is visible. If the F mark is no longer visible, install the spring plate with the convex side facing forward. Install the exhaust camshaft impulse wheel, aligning the pointer with the top edge of the cylinder head, and install mounting nuts finger tight. Pull out the exhaust camshaft splined shaft to stop, press down on the secondary chain tensioner, and remove the tensioner lock-down tool. Preload the primary chain by tightening the adjusting screw on BMW special tool 114220 to the specified torque, and preload the exhaust camshaft spring plate by pressing on the impulse wheel while tightening mounting nuts finger tight. Install BMW special tool 116150 to the front of the cylinder head timing case, installing nuts finger tight and then tightening down uniformly until the special tool is in full contact with the cylinder head. Ensure gasket material is removed from the face of the cylinder head, cleaning the sealing face and keeping it free of oil. Secure camshaft sprockets and impulse wheels by tightening mounting screws on the exhaust camshaft impulse wheel to approximately 5 Nm, followed by tightening mounting nuts on exhaust and intake sprocket assemblies to approximately 5 Nm, and then torquing down mounting screws and nuts to final specifications. Remove the crankshaft locking tool so that the crankshaft is no longer secured in TDC position, and remove camshaft locking tools from the cylinder head. Turn the engine over twice in the direction of rotation until cylinder 1 intake and exhaust camshaft lobes face each other, securing the crankshaft in TDC position with BMW special tool 115180. Place BMW special tool set 113240 over camshafts and measure clearances, noting that due to VANOS unit tolerances and play, the intake side of the special tool may be up to 1 mm above the surface of the cylinder head, which is normal. Otherwise, reset camshaft timing, ensuring that if the exhaust side of the tool is not flush with the cylinder head, camshaft timing is incorrect and requires resetting. Remove BMW special tool 116150 from the front of the cylinder head, reinstall the VANOS unit, remove camshaft and crankshaft locking tools, and reassemble the engine, ensuring to top off and bleed the cooling system.

Tighten them in the same manner as the right side, replace the sealing O-ring, press in the oil check-valve, and then install the profile gasket.

Begin by disconnecting the negative cable from the battery, ensuring to follow battery disconnection cautions.

Take off both cylinder head covers and remove the spark plugs, plugging the spark plug bores to prevent debris from entering the engine.