Very interesting story. Push in on its two tabs and pull up. function BlurEvent() { Replacing just the tensioner is a fairly easy job. Use a 10mm socket to secure the six bolts for the cowl cover to the car and an E20 socket to secure the four bolts that mount the brace to the car. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Use your fingers to thread them on so you don't cross-thread them. The thickest part of the bracket will go towards the passenger's side of the engine. First, fit the airbox onto its rubber mounts. The image below shows how they should be laid out. On the reverse side of the coin, the guides rarely break on the GM 3.6L I spoke of above. Jack up the engine to allow the engine mount to come out of the arm and the subframe. Doing so will unlock them and allow the cowl to be removed. The n20 engine when the cam lobes come to a rest vertically to the valves (very rare instance) they will rotate back slightly and cause slack in the chain Since the n20/n26 variants use a hydraulically actuated tensioner the chain will be taught or very tight only after the engine has warmed up to operating temperatures" 2500-3500 is a fair price for this job. Then, thread in the rest of the fasteners before tightening all twenty of them down with an 8mm socket. It is nearly impossible to get a look at it with a camera, so youll need to feel around until you find it. This harness is clipped to the valve cover at its lowest point. Before the crankshaft bolt can be removed, the vibration dampener needs to be removed. 00. Replacing the BMW N20 timing chain and guides is not for the faint of heart. I've also been told that in most cases you can hear the whine well in advance to it breaking. 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. Pull your hand off of the guide when you feel the tensioner makes contact with the guide. There are some visual differences and the spring on the latest version also seemed stronger. Part One of Two: There is one major Achilles heel with the BMW N20 and BMW N26 engines, the timing chain. 3 ratings. Jack the car up and place it on jack stands. If the flats on the camshaft dont line up with the tool, slowly rotate the crankshaft until they do. The N20 and N26 engines are known to have a problem with the timing chain and guides that were originally installed at the factory. Is it possible to change the guides without a mechanics 12hrs of labor? A plastic trim removal tool can be used to help pry the valve cover off of the cylinder head. Horizontally opposed views, only. bimmerfest.com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. Pulling out this plug will allow you to insert another lock to make sure the engine is set at top dead center for this procedure. Take a 16mm socket and rotate the ratchet to the right to pull the tensioner back. Lastly, pull the four ignition coils out from the engine. On the front of the timing chain cover under each camshaft sprocket, are the camshaft angle sensors. Grip the front of the engine cover and pull up to pop it off of the front locating pins. It will likely wear out faster if you use the wrong oil. $229.00 $ 229. If you were not aware, there was a BMW N20 timing chain recall because this issue was so prevalent. Improper oil maintenance, excessive heat, or even a faulty design from the manufacturer can cause the guides to wear quickly or crack. These 5 come in under $10,000. Steps required to remove the BMW N20 timing chain: Step 1: Put the car into neutral The engine needs to be able to rotate freely by hand to remove the timing chain and its associated components. The BMW N20 timing chain is replaced because it wears out quickly for the following reasons: The tensioner has deteriorated, as a result, the timing chain of the BMW N20 does not stretch well, slips, and the valve timing is disturbed. Slide the engine cover over the foam and into the two slots at the back of the engine. If you're interested in more DIYs for your BMW, you can visitbmw.fcpeuro.comandsubscribeto our YouTube channel. Use a jack on the transmission to lift the engine up and towards the passengers side to wiggle the pan out. Make sure the chain is seated properly in the teeth of the sprocket. If everything was done correctly, the car will start and run with no issues. Next, sit the wiper cowl over the wiper motor and seat all of the locks into place. Take the fuel rail and situate it on the valve cover. Improper oil maintenance, excessive heat, or even a faulty design from the manufacturer can cause the guides to wear quickly or crack. 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N20 timing chain issue. Use an E6 socket to remove the three fasteners mounting the bracket to the valve cover and then move the harness towards the drivers side of the car, away from the engine. Leave the solenoid attached to the actuator; it will mount to the valve cover. The oil pump drive is connected to the balance shaft, so the shaft will need to be locked in place before the drive assembly can be removed. A flat-blade screwdriver can help push the tab in while you pull on the plug. if(document.body.contains(fname)) { Lastly, install the strut top covers. The N20 is a 2.0L inline-4 single turbo engine that replaced the naturally aspirated 3.0L N52/N53. bimmerfest.com is not in any way affiliated with Bayerische Motoren Werke AG. Thniking Audi A5 Sportback or 4-series Gran Coupe. I'm personally going to just keep checking until my CPO is up in 11k. For engines with timing chain issues like BMWs N20 or several of Audis engines, this means expensive and lengthy services to prevent a ruined engine. Pull back on the two tabs and pull the hose down to disconnect it. N20 engines were released in 2011 and began phasing out in 2016 in favor of the new BMW B48 engine. The smallest part of the brace is held in with six 10mm bolts. Then, lower the engine down onto the mounts. Read up on each generation and find out which one fits you best. :1 3dXfz1FF7s/3$ 6 @$*i` And with that, the entire timing chain/oil pump drive assembly has been removed from the engine. Then, install the rubber gaskets into the valve cover. So yes replacing the affected parts is a good idea as preventive maintenance, and replace the timing chain along with the guides as well. Install the two E8 bolts first and then move to the T40 guide pin at the top of the right-side guide, followed by the two T45 guide pins just above the crankshaft. With that said, it is a doable job for a DIY'er if enough precaution is taken. The timing chain guides, as their name suggests, keep the chain on its proper path at the proper tension. For BMW - N20 / N26 alignment Pin, For BMW - N40 | N42 | N45 | N46 | N52 | N55 | N62 chain tensioner. Torque the plug to 25 N m using an 8mm hex or Allen socket. Once all of those have been released, pull the airbox out of the engine bay. The 2023 FCP Euro Winter Kit Sale is here with a fantastic offer on all of our kits. The issue is still fairly rare, and it's not too terribly likely you'll be affected. Nice 89k miles already..not bad.I will be keeping mine around 150k - 200k or longer of the interior and exterior is not bang up or look old or outdated.if you know what I mean. Pull up on the pins to release them and push down on the intake pipe to separate it from the airbox. You can use a flat-head screwdriver, youll run the risk of scoring the aluminum head. Check these out to see just how in-depth we go to make them. The outer panel is secured to the car with twenty 8mm bolts. The crankshaft pulley mount sits on the snout of the crankshaft and helps to align the chains in the engine. The wiring harness for the last few plugs runs along the back of the valve cover and is secured to it via a bracket. hbbd```b```Dp:"m D`R,$n,$oe`bd`\F?/ ,F Push in the tabs on the plugs and separate the connections. When it reaches that point, install the fuel pump. Tighten the nut used to secure the mount arm to the mount with a 16mm socket and an E12 socket for the three bolts securing the engine mount to the subframe. Each piece will slot into the middle cowl piece first, and then three plastic locks can be twisted into place with a 10mm socket. Next, slide the wastegate actuator through its mounting bracket and secure it with its three 10mm nuts. How long will it take to service the timing chain system on my BMW N20/N26? Some models with the N20 were recalled while others fall under an extended warranty. Labor: $957 to $1,207. Release the hold on the tensioner once all of the ribs in the belt are sitting in their grooves. 287 0 obj <> endobj VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The guides are made from plastic. But this valve guide issue has me concerned. This is my first German car and all of my prior experience is with GM/Cadillac products, specifically the 3.6L global V6 that is also known to have chains stretch/guides break. Use the straight sections in the seal to determine where it should sit in the pan. Including fluids replacement. It turns out a simple process issued by BMW is the fix. A new cover will cost you $455. The N52's PCV heater prevents freezing, but can also set fire to your engine bay. This motor is in just about all GM vehicles and product lines currently, no exaggeration. The top pair of ears on the right-side guide clip onto the upper center guide. Adjust the tool as necessary and then lock it down by tightening the two bolts with a 13mm wrench. Pull the wiring out of the rubber seal just forward of the cowl and pull the seal off the strut brace. Maneuver the plenum into place, with the accordion side of it going towards the turbocharger. Tightening this bolt will thread it up into a small lever coming out from the transmission. 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Youll need to reach up on the passengers side of the transmission with a hook or pick tool and pull the plug out. This Has been a big subject with everyone on my blog,,,,some of you guys have been asking about the bulletin about this repair,,,,so this is the BMW bulletin that us technicians work with,,,,I hope this helps some of you guys. There are two plastic rivets, one on each corner of the cowl. As it stretches, the chain gains play, allowing it to move around inside the timing cover. Use an E8 socket to tighten the bolts securing the transmission lines. couponID:"CouponID", // coupon offered, change as needed. Lastly, remove the two E8 bolts in the center of the middle guide. 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. This job requires several specialty tools and a wealth of wrenching experience. 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. If you left the two bolts in the vibration dampener mount, remove them. Using a 17mm wrench, disconnect the fuel line going from the high-pressure fuel pump to the fuel rail, the feed line to the fuel pump. FREE delivery Sat, . Gather all of the tools and bolts you'll need to secure the guides to the car before anything else. Flip-up the lock on the plug, and connect the harness to the coil, then lock them once connected. 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. Once it is secured, spin the camshaft adjusters until the holes in them line up with the pins in the timing tool. Starting with the airbox, loosen the intake pipe clamp on the backside of the airbox with a flat-head screwdriver. Like you alluded to, it sort of seems like a chicken or the egg sort of debate. The issue is so much of a tensioner issuer as it is the guide itself. Remove that with an E8 socket as well. The lobe must be at its bottom-most point when installing the fuel pump to prevent any damage being caused. It's a new year, and that means new inventory. Turn it toward the back of the engine to loosen it enough to spin it with your fingers. 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. The new timing chain assembly is shipped unassembled and needs to be snapped together before being installed. Go back to the battery, refit the negative cable onto the battery, and tighten it down once everything is connected. Once the valve cover is seated, connect the vent line at the front of the cover. Thread the new tensioner into the engine once. Mark the variable timing components so that they dont get mixed up. A BMW N20 timing chain replacement can cost between $1000 and $5000 depending on the severity of the problem. On either end, there are two push clips that lock it into place. Biggest solution to this is coding out auto stop/start. The BMW timing tool and be placed onto the camshafts once top dead center is reached. showfeature: 1 // change to 0 to turn it off, 1 to turn on. Then clip the harness onto the bracket behind the engine. Horizontally opposed views, only. If the chain hasn't stretched, then something has happened to the guides. Cost at the Mechanic: $1,624 to $1,879. This job requires several specialty tools and a wealth of wrenching experience. When those last two bolts are removed, remove the entire timing chain and guide assembly as one unit. Back the threaded rod out until the knurled portion of the tool sits against the block. Thread the smallest cap into the hole just under the driver's side camshaft. The removal of the mount gives much more access to the oil pan bolts. If it fails, the timing chain . Has been very reliable so far. Pinch them together and then rotate the left-side guide back to its vertical position to lock them together. While sliding both of the sprockets on, you'll need to work the chain into the groove of the top guide as well. With everything in place, use a torque wrench to tighten everything to spec. Buying a cheap European luxury car can be intimidating. Take a look at the timing chain sprocket now that its out of the car. Definitely doable but would take a day or two depending on experience: The guide is made of a faulty material that degrades much quicker than expected. Engines are built to tight tolerances, and a worn chain will put the internal parts outside of those tolerances. The chain tensioner is malfunctioning due to low oil pressure. @import url("/site/css/styles-bryson-2023-03-06.css"); Let the starter run for somewhere between 5 and 10 seconds, and repeat the process once more. If BMW knows they're not saying, but they did change the tensioner, didn't they? This part is listed by BMW as BMW part number 11318685091 (11-31-8-685-091) and is described as Timing Chain Tensioner for the N20 and N26 4 cylinder turbo gas engine, as used in 2012, 2013, 2014, 2015, 2016, and 2017. Use an E8 socket to remove the single bolt holding each of them in and then pull them out of the cover. The new sprocket is available on our website and is linked above. The real issue is if the timing chain skips a tooth and goes out of time and valves meet cylinder and then bye bye engine. We found it easiest to remove the driver's side engine mount entirely. Tighten all of the bolts to 12 N m. A pair of transmission lines need to be reattached to the oil pan. Use a 10mm wrench or socket to secure the bolts mounting the tool to the engine. Using a twelve-point 14mm socket, remove the spark plugs from the cylinder head. Free shipping. Surely there is a reason why BMW has used at least three different models of this part. Instagram: rjd_f30 | Current: EBII 2013 335i 6MT RWD & Sprint Blue 2008 Audi RS4 | Retired: 2013 328i, 2000 XTerra, 2022 Civic Si |. The job itself requires three special tools specific to this engine. One the passengers side of the engine block, where the wastegate actuator sat, is the timing chain tensioner. Remove the fuel pump from the cover using a T30 socket to remove its two mounting bolts. With your other hand, get the belt around the alternator pulley and the A/C compressor. There are several plastic underbody panels that need to be removed in order to access the engine. Set that out of the way and use a 10mm wrench or socket to get to the three bolts on the back of the actuator. Amazon.com: SCITOO Fit BMW N20 N26 Engines Cam Camshaft Alignment Timing Locking Tool Come with 1 Chain Tensioner 1 Camshaft Locking Tool 1 Carry Case: Automotive - I ordered the flywheel lock and oil pump removal tool as a set from Amazon. However, if you were to go to a dealership for this job, out of the 7 year/70,000 mile warranty, youll be on the hook for more than that. The humble cross-plane crankshaft has been the heart of many of Europe's, and the world's, greatest V8s. Use the old assembly as a guide. Application : Applicable to BMW N20 and N26 engines (4 Cylinder Turbo), see more details for below description ; Package Include: 1x Camshaft Locking Tool ,1x Camshaft fixating base Tool ,1x Alignment Pin ,1x Chain Tensioner Take your time figuring out the orientation of the seal. A lobe on the exhaust camshaft interacts with the high-pressure fuel pump to send fuel into the engine. Lift the chain and slide on the exhaust sprocket. Then, use an 8mm socket to tighten the six bolts mounting the panel to the car. Next, fit the engine mounts back into the subframe and thread in the bolts to get it in the right orientation. The vacuum pump sits at the back of the valve cover and runs off of the intake camshaft. The cost will get higher if you have to buy any of the other tools needed for the job. Roller chain sprockets do not wear in diameter, but in tooth profile, becoming shark fin. Pull the negative cable off of the battery afterward. Next, compress the chain tensioner and use the pin provided in the tool kit or an Allen wrench to lock the tensioner and guide out of the way. The two special bolts thread into the middle two spots at the back of the oil pan. 2,357.00 inc vat (Including Automatic Transmission Fluid & Filter, as this is part of the complete repair) BMW 44 xDrive models are an extra 300 of the above prices to remove the extra transfer case & front differential as part of the repair. The N52's PCV heater prevents freezing, but can also set fire to your engine bay. The pre-2013 engines also have two vacuum lines on the passengers side of the cover that need to be disconnected before the cover can be removed. Factoring in the cost of the tools with the parts brings the DIY bill to nearly $1200. Start the threads on the feed line to the pump and the feed line from the pump to the rail. Next, refit the two-piece lower cowl. Timing chain tensioner: is it worth replacing as preventative for high mileage N20? Thread them in by hand, so they don't become cross-threaded and tighten them to 10 N m with a T30 socket. Have the new bolts at the ready and install the new panjack up the engine as much as needed to slide the oil pan into place. Biggest solution to this is coding out auto stop/start. And I assume "newer is better." There are two clips holding the cowl on, on either side of the engine bay. hmO03MmjL%u,0:4]A3(ID;#c8#D Z'%aLn0& No . 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