BMW Timing Chain Diagnosis & Repair If you own a BMW model from any of the BMW 1, 3 or 5 series manufactured between 2007 and 2011 then your car is liable to have a timing chain problem. Larger inlets and outlets will allow the turbos to move air more efficiently thereby increasing horsepower and reducing stress on the turbochargers. For the timing chain, timing chain guides and timing chain cover removal procedure for the 6 cylinder look at the E46 articles. The following two tabs change content below. BMW fixed this on their newer cars with an electric water pump. Learn how to replace a BMW F30 engine air filter. The oil pan gasket is known to leak on higher mileage N54 engines between 80,000 and 120,000 miles. Injectors are one of the more common failure items. Rather, if you’re having misfire issues and neither spark plugs nor coils fix the issue then it’s probably your injectors. timing chain: 2.5 L N52B25 (525i, 523i) timing chain: 2.5 - 3.0 L N53 (523i, 525i, 528i) 2.2 - 3.0 L M54 I6v(520i, 525i) timing chain: 3.0 L N54 turbo I6 (535i) timing chain: 4.0 - 4.8 L N62 V8 (540i, 545i) timing chain: 5.0 L S85 V10 (M5) timing chain: 2.0 L M47 turbo I4 (520d) timing chain: 2.0 L … For mid-1990s and older engines, the recommended replacement interval for most timing belts is usually 60,000 miles. The stock oil cooler found on some N54’s (a lot of n54’s have no oil cooler) is very small. $35.47 $ 35. Water pumps rarely last more than 100k miles on the N54, so if you’re planning on doing a long road trip or can’t afford to be late to work, this is good preventative maintenance around the 90,000-mile mark. Learn how to replace the low beam headlight bubs on a BMW F30 and F31 with only a few basic tools. Being able to see is important for you and others. It can leak internally causing your oil and coolant to mix, or it can leak externally causing oil to drip/spray onto the drive belt components. I had 5 faulty injectors on my 2007 335i with 81k miles at the time (the issue wasn’t noticeable until I changed the old spark plugs). The turbos on the N54 are good for what they are, and they are under-boosted from the factory. My 335i is full bolt-on running 30% e85 and I change mine every 12k miles. You can also get an OCC (oil catch can) which will collect some of the oil blow by and reduce carbon build up. Click here for more N54 Tuning Guides: BMW N54 Tuning. N43 chain is shared with N53, N54, N54T ..and yet you never hear of timing chain or guide problems on the n53 or n54 engines - wonder why the n43 engine is affected and not those. I don’t want to run my engine with it making this noise as I’m not sure if I’m hurting anything. That’s because my bank 2 turbo was running 19psi + any additional pressure dumped into the turbo from the crankcase. If I had been smart……which I’m not…….I would have held onto the OEM PCV Valve to reinstall but I tossed it and I can’t find an OEM PCV Valve to put back into the engine. Could I be hearing leakage past the front crankshaft seal? Over the past few years, the N54 twin turbo 3.0 lite inline-6 has gained the reputation of being an easily tunable and powerful engine. The N53 and N54 straight-six has unfairly earned a bad reputation for reliability with technicians due to timing chain and variable valve timing problems. The less modifications you have the longer you can wait. BMW timing chains are engineered for the life of the engine and never need maintenance or replaced. The timing chain links all the moving parts of an engine that work together in order to drive a car forward. The above maintenance and repairs encompass the basics of ensuring your engine internals and turbos are running at their prime. The PCV Valve (positive crankcase ventilation valve) can begin to leak due to over-pressurization of the crankcase. When my valve cover gasket was leaking an indy mechanic and two local BMW dealerships told me not to worry about it. Of course there are many other things that may go wrong with your n54, but one thing remains true. However, at higher power levels you will certainly burn through coils much faster. However, spirited drivers (probably most people with tuned n54’s) should stick to the lower end of the interval. BMW E90 models utilize 1 multi-rib engine drive belt. The electric water pump has a lot of benefits over the mechanical variant. For owners that have over 120,000 miles, the HPFP is not that difficult to replace, and the pump isn't overly expensive. This can cause a rattling noise when lifting off the throttle, a 30FF boost-leak code, and eventually cause the turbos not to create boost at all. They've had over ten revisions, but are still known to fail. Shopping for OEM BMW Parts? Once our BMW V8 engines have between 100,000 to 200,000 miles they may develop a problem where the timing chain guides break. They must all work in perfect harmony. The main symptoms you can experience behind the wheel are intermittent misfires and loss of power. While the N55 has been deemed less tune-able than the N54, you can still achieve sizeable power gains at a relatively cheap price! Share I would just go back to the OEM PCV. Check out BMW Parts Factory with over 10,000 OEM parts in stock. There have been stories of belts getting sucked all the way into oil pickup, causing the If you've ever had to bleed an older BMW's cooling system, you know how much of a pain it is. Learn how to reset it in a matter of minutes. What is a vacuum pump on a car and what does it do are the two most-asked questions we're asked about them. With the mounts being stiffer, the engine has far less movement under hard driving situations. The oil filter housing gasket is a known gasket that can leak on the N54 powered cars. When the N54 shreds a belt, you're going to have a bad time. Since this motor shipped with forged internals, a few mods can reveal insane power. If you have access to E85 this is probably the single best thing you could do to your modified n54. When your valve cover is leaking it causes an over-pressurization of the crankcase. Have your VIN ready. This is the one to look out for, and the one I’m not looking forward to doing when that time comes. Higher-octane fuels aid in knock suppression and can help prevent misfires. Back in the 90s they took a e34 (5 series) and ran it over 2 million miles, just performing the standard maintenance. 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