There are three bolts holding the oil pump drive assembly into the engine. While sliding both of the sprockets on, you'll need to work the chain into the groove of the top guide as well. Find a non-dealer service center to change it, ASAP. So yes replacing the affected parts is a good idea as preventive maintenance, and replace the timing chain along with the guides as well. Here are some of our favorites from Europe. Use the old assembly as a guide. (window.zIP=function(e){o.apply(null,arguments)},(n=new XMLHttpRequest).readyState?n.onreadystatechange=function(){"loaded"!==this.readyState&&"complete"!==this.readyState&&4!==this.readyState||o(this.responseText)}:(n.onload=function(){o(this.responseText)},n.onerror=function(){o("")}),n.open("GET","//api.ipify.org?format=json&callback=zIP",!1),n.send()):o()})({"id":"2801","key":"43HU93QZFAWW","mode":"ENABLED","debug":false,"hideHello":false,"express":true,"checkout":false,"estimator":true,"pdp":null,"redirect":{"checkout":"","express":"Loading Secure International Checkout"},"ip":"172.71.178.103","site":{"currencyCode":"USD","countryCode":"US"},"item":{"internalid":"59348","name":"Timing Chain Replacement Kit - F22 228i, F30 328i, F32 428i, Z4 28i N20/N26 RWD","url":"http://www.bimmerworld.com/Engine/Camshafts/Timing-Chain-Replacement-Kit-N20-RWD.html","price":{"list":"$689.99","sale":"[Error processing dynamic tag getCurrentAttribute('item', 'pricelevel') : record kit 59348 not found]"}}}, []) These two flats need to be aligned for the pump to be installed correctly. Clip the airline on, plug in the sensor, and clip the coolant line under the plenum towards the driver's side of the engine bay. ok I'm getting a lot of questions about the N20 timing chain noise and replacement,,,,here are 2 short audio clips,,,,you can here a high pitched whine in both videos. The oil pump drive assembly comes preassembled with the tensioner already locked in place. The transmission pan is secured to the body via four 8mm fasteners and a singular 10mm fastener. Thread it in a few turns, move the guide, and check to see whether or not it pivots on the pin. The good news is that BMW recognized the timing chain components in the N20 and N26 engines were prone to failure. Was replying to a comment and figured I share my experience with everyone here. If youre reading this DIY and have already drained the oil, there is a way to get the transmission into neutral without starting the car. Im with you on that. You run the risk of severely hurting the engine if any of the steps are not done correctly, but if you follow along with our DIY, youll have all of the steps laid out in front of you. Chain tensioner or guide problems: The chain relies on guides and tensioners to stay in place and work properly. Rotate the crankshaft until the piston is at the top of its stroke, meaning the rod is pushed out as far as it will go, and neither camshaft is opening valves on the first cylinder. The bolt behind the upper plug can be removed with a T40 socket, while the bolts behind the lower plugs need a T45 socket. For those capable or bold enough to take on this job, there is a lot of monetary savings to be had. Once it is secured, spin the camshaft adjusters until the holes in them line up with the pins in the timing tool. Missing something during reassembly will only cost more time and headaches. The timing chain has a very important role as it ensures that engine valves open and close at the proper times during each cylinders intake and exhaust strokes. Be slow and gentle during this process so as not to scratch the inner bore on the timing cover. Leave the solenoid attached to the actuator; it will mount to the valve cover. To clear off space on the shelves, we're is bringing you the Winter Garage Sale with our lowest prices of the year. They've gone through like five variants of all those parts apparently. To replace the entire guide/chain/tensioner is either a costly fix with a shop or a longer one with you doing it at home. Part of the reason Im so interested in learning about this platform. The passenger's side cover will have one push clip near the fender and will clip onto the strut bolts. . October 13, 2022 by Carolina. On the front of the timing chain cover under each camshaft sprocket, are the camshaft angle sensors. WHEN the guide breaks, the timing chain begins to stretch. The E8 bolt gets 10 N m, the T40 guide pin gets 14 N m, and the T45 guide pins get 24 N m of torque. Disconnect the wiring from both of them. Remove the old crankcase vent line o-ring and replace it with the one supplied in the kit. How much will it cost to service the timing chain system on the BMW N20/N26? Lastly, remove the two E8 bolts in the center of the middle guide. Use a? How long will it take to service the timing chain system on my BMW N20/N26? The job itself requires three special tools specific to this engine. Grab a set of channellocks and grip the knurled part of the tensioner. Timing Chain Kit For BMW N20 N26 Z4 320i xDrive X3 2.0L F10 F22 F23 F30 12-17. Pull the variable timing components off of the sprockets and then pull the sprockets off of the camshafts. The guide with the two bolt holes in the center goes inside the chain at the top, and the sprocket sits in the chain at the bottom. These are all pretty standard specs for most modern BMW engines. gmltheme: 1, // Change theme here (1,2,3) This engine component is designed to last, but it is subject to wear and . Use a 27mm socket to loosen the tensioner to finger tight. Also, have the new tensioner within reach once the tool is removed. The characteristic whine that presages the failure of the chain indicates that it's likely the chain that breaks first, taking the guide out when it does. Use a 14mm wrench to tighten the lines to the injectors. Head into the trunk and locate the battery. Once it is nearly in place, hold the assembly against the block with one hand, while threading in one of the center bolts with the other hand. couponTxt: "CouponTxt", // offer text There are two plastic rivets, one on each corner of the cowl. The issue is with the timing chain tensioner. A lobe on the exhaust camshaft interacts with the high-pressure fuel pump to send fuel into the engine. As it stretches, the chain gains play, allowing it to move around inside the timing cover. Stay tuned to the blog for part 2 of this project, where we show you how to install the new timing chain/oil pump drive assembly. Have even more rags ready for the fuel that will come out of the lines. Place the wiper arms on the studs and tighten down the nuts with a 16mm socket. They did update the tensioner as well, but the root cause as far as I understand was the guide primarily. The rail itself is mounted to the cover by two clamps with two bolts each. On the reverse side of the coin, the guides rarely break on the GM 3.6L I spoke of above. Lastly, mount up the belly pan to the car. Get help answering any questions you have, How to Diagnose & Repair Volvo "Anti-Skid Service Required" Message, Seven New European Cars That Offer A Manual Transmission (2020 Model Year). . Then, pick up the timing chain assembly from the top and carefully drop it into the engine. Then, use a 5mm hex socket or Allen wrench and turn the eight fasteners on the cowl 90 to the left. Table of Contents show. Take the fuel rail and situate it on the valve cover. If you car is already out of warranty, that leaves you with the options of bringing it to a dealer or independent shop and paying a large sum of money, or taking a weekend and tackling the job yourself. Fit for BMW N20 N26 Engine Camshaft Alignment Timing Locking Master Tool Kit US. Factoring in the cost of the tools with the parts brings the DIY bill to nearly $1200. One of the plugs will have only four pins while the other has five. If you left the two bolts in the vibration dampener mount, remove them. We found it easiest to remove the driver's side engine mount entirely. The largest gasket and the two rectangular ones get installed on the inside of the cover, and the oval-ish one gets installed on top. According to BMWs statement on it and reports of those with bricked engines, it appears to be the plastic guide wearing down too quickly leading to slack and eventually skipping a tooth. Use an E12 socket to torque them to 9 N m. To be extra careful, tighten them all halfway before starting the pattern over again and setting the final torque value. Refit the transmission's dust shield and secure it to the bell housing with three 10mm bolts. If it doesnt, recheck the previous steps. Eventually it breaks, taking your whole engine with it. Next is the steering rack cover. Before fitting the camshaft timing adjuster to the valve cover, wipe some fresh oil around their o-rings. The forward-most corner will also fit into a rubber mounting grommet. Like you alluded to, it sort of seems like a chicken or the egg sort of debate. Then, pull the cam lock tool off of the engine. Next up is the fuel rail plug. Step 15: Install the camshaft timing adjusters, boost control solenoid, and vacuum pump, Step 17: Install the backside wiring harness, Step 18: Refit the ignition and fuel injector harness, Step 21: Reinstall the cowl brace and trim, Step 22: Install the engine foam and cover. The issue isn't so much of a tensioner issuer as it is the guide itself. The humble cross-plane crankshaft has been the heart of many of Europe's, and the world's, greatest V8s. It is the N20 engine (turbo 4 cylinder engine) used in the X3 28i for certain X3s from 2012 to 2014 that is reportedly most prone to failure of timing chain guides. Take the left-side guide and rotate it to the left so that the bottom is closer to the right-side guide than the top. The oil pump drive assembly needs tension on its chain too, so remove the pin from that tensioner. BMW petrol engine rebuild & timing chain repair various models from 2001 thru 2015 - engine codes N20, N42, N43 . It will likely wear out faster if you use the wrong oil. Biggest solution to this is coding out auto stop/start. All of the gaskets go on one way, so be sure that they are all in the proper orientation. Next, loosen the four top bolts on the cam lock tool, and remove the two mounting bolts. I just did this job on a 2013 X3 XDrive (11/21). This harness is clipped to the valve cover at its lowest point. If the flats on the camshaft dont line up with the tool, slowly rotate the crankshaft until they do. Timing chain guide failure at 74,100 miles. However, the timing chain is one of the major parts that will be affected. Take the vibration dampener and seat it on the mount, lining up the bolt holes. BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST, N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications, https://www.newtis.info/tisv2/a/en/fshaft/HtiBPV3K, https://www.newtis.info/tisv2/a/en/fshaft/HipcnQuO, https://bmwtechnician.com/2016/08/07g-chain-issue/, https://www.carcomplaints.com/news/2g-chains.shtml. --> The locking pin with the yellow cord attached to it should slide into the space that the plug occupied if the car is at top dead center. Let the starter run for somewhere between 5 and 10 seconds, and repeat the process once more. Use an E6 socket to tighten the three screws that mount the bracket to the valve cover and torque them to 6 N m. The third screw mounts to the back of the cover in a similar orientation to the vacuum pump bolts. Then thread in the new oil pump sprocket bolt by hand before tightening to 95 N m with a T60 socket. Push down on the tab and pull the plug off. Using a 24mm socket, remove the camshaft sprocket nuts. 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