There are several plastic underbody panels that need to be removed in order to access the engine. Follow the specific BMW pattern shown below when tightening and torquing down the valve cover bolts. Use a 22mm socket on the crankshaft bolt to turn the engine over. Some models with the N20 were recalled while others fall under an extended warranty. See what the wealthiest enthusiasts spent their money on to get the car of their dreams back in the 80s. On the front of the timing chain cover under each camshaft sprocket, are the camshaft angle sensors. Using a 24mm socket, remove the camshaft sprocket nuts. In the middle of nowhere without cell service? Move the remaining hose from the vacuum pump under the harness and around the engine. if(document.body.contains(fname)) { gmltheme: 1, // Change theme here (1,2,3) Next is the steering rack cover. #1 -Timing chain #2 -Chain tensioner and guide rail #3 -Slide rail #4 -Sprocket #5 -Chain tensioner with seal Part Number Description Quantity 11 41 7 605 366 Chain Drive 1 11 31 8 648 732 Timing chain 1 11 31 7 592 877 Chain tensioner and guide rail 1 Sponsored. Timing chain tensioner: is it worth replacing as preventative for high mileage N20? The issue is with the timing chain tensioner. @import url("/site/css/styles-bryson-2023-03-06.css"); Then connect the intake pipe to the airbox and plug in the mass airflow sensor. If everything was done correctly, the car will start and run with no issues. Grab a set of channellocks and grip the knurled part of the tensioner. According to the timing. The Fora platform includes forum software by XenForo. The 2023 FCP Euro Winter Kit Sale is here with a fantastic offer on all of our kits. I say this loosely but "usually" the tensioner is located behind the timing cover. Flip-up the lock on the plug, and connect the harness to the coil, then lock them once connected. October 13, 2022 by Carolina. 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. Automotive Replacement Engine Timing Part Sets & Kits; Automotive Replacement Belts, Hoses & Pulleys; One of the plugs will have only four pins while the other has five. Next, take the flywheel locking tool and install it with the teeth facing upwards so that they mesh with the teeth on the flywheel. For BMW 428I GRAN COUPE 428i XDrive 2.0L TURBOCHARGED 2.0L Replacement Timing Chain Kit. Next, unplug the mass airflow sensor next to the clamp and unclip the hood release cable from the back of the airbox. The CTA balance shaft tool used to lock the shaft in place mounts under the oil pickup. On the reverse side of the coin, the guides rarely break on the GM 3.6L I spoke of above. To do that, do what you would do to normally start the car. Remove the fuel pump from the cover using a T30 socket to remove its two mounting bolts. Use an E8 socket to remove the single bolt holding each of them in and then pull them out of the cover. Steps for reassembling the BMW N20/N26 timing chain assembly: Step 1: Assemble the new timing chain assembly The new timing chain assembly is shipped unassembled and needs to be snapped together before being installed. 2012-2015 BMW 3-Series and 4-Series Forum. $10998. A plastic trim removal tool can be used to help pry the valve cover off of the cylinder head. var fname = document.getElementById("name_fs"); It will plug into the bracket on the ignition harness, and the ignition harness will run under the boost line going from the wastegate actuator to the boost solenoid. A jack handle or a long piece of pipe can be slipped over the breaker bar. Have plenty of rags ready when threading the tensioner out by hand, it is oil fed and will leak oil upon removal. Remove the bolts and slide the panel forward to remove it. If you don't have a torque wrench that goes that low, get the rod as tight as you can with your fingers. The smallest part of the brace is held in with six 10mm bolts. The engine needs to be able to rotate freely by hand to remove the timing chain and its associated components. 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 However, there are some gems out there that won't break the bank. Take a long screwdriver or a straightened piece of a wire coat hanger and stick it into the front cylinder through the spark plug hole. 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. 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, you'll have the entire process laid out step-by-step. Slide the cam adjusters into the cam sprocket and thread them on by hand. Posted on August 2, 2017 by bmwtechnician. showfeature: 1 // change to 0 to turn it off, 1 to turn on. Slide the front of the pan under the bumper and thread in one of the fasteners. Use a 22mm socket to rotate the pulley to give yourself better access to the bolts. Next, grab the large green CTA timing tool and set it in front of the camshafts. Next, fit the new oil pan seal into the channel in the oil pan. When installing the valve cover, be very careful not to crack it. There is a small circular plug on the harness for the fuel pump and boost control solenoid. Start the threads on the feed line to the pump and the feed line from the pump to the rail. 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. The image below shows how they should be laid out. Audi had/s a similar but more prevalent problem with the timing chain systems on the 4.2L engines, and in those cases, it's always the guide that breaks. 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. Im with you on that. TIMING CHAIN KIT For BMW ENGINE CODE: N20B20A, N20B20B, N26B20A 228i 320i 328i 2.0L. So yes replacing the affected parts is a good idea as preventive maintenance, and replace the timing chain along with the guides as well. Bringing the BMW community together. 287 0 obj <> endobj The removal of the mount gives much more access to the oil pan bolts. Using a 10mm wrench, remove the negative cable from the battery, breaking the electrical circuit. Place the rubber covers on the nuts once they're tight. BMW N20 Timing Chain Replacement Torque Specs: BMW Oil Pump Drive Mounting Bolts = 10 N m or 7.4 lb-ft of torque, BMW Oil Pump Sprocket Bolt = 95 N m or 70 lb-ft of torque, BMW Timing Chain Guide Bolts = 10 N m or 7.4 lb-ft of torque, BMW Timing Chain Upper Guide Pin = 14 N m or 10.3 lb-ft of torque, BMW Timing Chain Lower Guide Pin = 24 N m or 17.7 lb-ft of torque, BMW Camshaft Adjusters = 55 N m or 40.6 lb-ft of torque, plus 55, BMW Crankshaft Bolt = 100 N m or 74 lb-ft of torque, plus 270, BMW Upper Guide Pin Plug = 25 N m or 18.4 lb-ft of torque, BMW Lower Guide Pin Plugs = 50 N m or 37 lb-ft of torque, BMW Vibration Dampener Bolts = 35 N m or 25.8 lb-ft of torque, BMW Camshaft Position Sensor Bolts = 6 N m or 4.4 lb-ft of torque, BMW Oil Pickup Bolt = 10 N m or 7.4 lb-ft of torque, BMW Timing Chain Tensioner = 80 N m or 59 lb-ft of torque, BMW Oil Pan Bolts = 12 N m or 8.9 lb-ft of torque, BMW Dust Shield Bolts = 10 N m or 7.4 lb-ft of torque, BMW Valve Cover Bolts = 9 N m or 6.6 lb-ft of torque, BMW Camshaft Adjustment Solenoids = 5.5 N m or 4 lb-ft of torque, BMW Boost Control Solenoid = 5.5 N m or 4 lb-ft of torque, BMW Vacuum Pump Bolts = 10 N m or 7.4 lb-ft of torque, BMW Fuel Injector Connections = 23 N m or 17 lb-ft of torque, BMW Fuel Rail Clamp Fasteners = 8 N m or 5.9 lb-ft of torque, BMW High-Pressure Fuel Pump Bolts = 12 N m or 8.9 lb-ft of torque, BMW High-Pressure Fuel Line Connections = 30 N m or 22.1 lb-ft of torque, BMW Wiring Harness Bracket Screws = 6 N m or 4.4 lb-ft of torque, BMW Oil Filter Housing Cap = 25 N m or 18.4 lb-ft of torque, BMW Spark Plugs = 23 N m or 17 lb-ft of torque, We hope that you found this detailed guide on how to reinstall the timing chain system on your BMW N20 useful and save a large chunk of money in the process. 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