First off, as said, the timing chain is still located at the back of the engine. The N47D20 is still being used today. I have not read anything about them changing out the engine, though there was this article from about BMW doubling down on their use of the chain at the rear of the engine, supposedly to go into production cars this yearbut I've not read where they've actually started using the engines. These newer engines are supposed to share many of the same components, have the same amount of displacement per cylinder whether gas or dieseland use the same mounting points in the engine bay.
Until they do start utilizing the new engine, BMW continues to use the N47 as a mainstay in their fleet. Since BMW will not own up to the timing chain problem publiclythe best we can do is to see what the BMW owners community has said about it. According to the community, the problem lies with the crank shaft sprocket.
This is an excerpt from this forum:.Blynk timer library
BMW recognized it as a fault and fixed the sprocket issue in roughly March some older engines were still installed at a later date but later model have since failed, the mechanics on the site have seen mainly jumped chains on manual cars that have been been ragged, auto's don't do the same harsh gear changes and so are less prone to failure.
Still, others claim the manual tranny v. Failure rate does seem to have decreased dramatically since BMW made the changes, but that does not mean you won't have mechanical chain failure on the N Bottom line, if you start hearing the timing chain start rattling, you should get it looked at.
This is a very big job. The chains are at the rear of the engine, and requires engine, head, and sump removal to replace the chains. They engine is also set up with a set of special tools and timing plates. BMW say that any previous weaknesses are now resolved. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.
Ask Question. Asked 5 years, 9 months ago. Active 4 years, 9 months ago. Viewed 95k times. Also on this model, is the timing chain still at the back of the engine or the front?Funds for msme
Sean Chapman Sean Chapman 1 1 gold badge 2 2 silver badges 6 6 bronze badges. I have a d with 18, on the clock full service history, and as we speak it is in the workshop with the engine striped down due to a timing chain fault.
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This is an excerpt from this forum: BMW recognized it as a fault and fixed the sprocket issue in roughly March some older engines were still installed at a later date but later model have since failed, the mechanics on the site have seen mainly jumped chains on manual cars that have been been ragged, auto's don't do the same harsh gear changes and so are less prone to failure.
Great answer.Premature timing chain failure has become a serious problem for many BMW owners — regularly discussed in BMW website forums, featured on BBC Watchdog and highlighted in other media sites. A range of BMW diesel engines produced between and appear to have a design problem affecting the timing chain. The engine timing chain is very weak — it stretches over time, and ultimately snaps.
When a BMW engine timing chain snaps, the inlet and exhaust valves collide with the pistons, resulting in massive engine damage. At this point it will bend all 16 valves, shatter the rocker arms, snap and distort both camshafts and the camshaft housing.
The timing chain is located at the rear of the engine bay and is not intended to be a serviceable part. We have rebuilt over a thousand BMW engines damaged by timing chain failure, and we have developed a thorough, highly successful engine rebuild procedure. Repairing the catastrophic engine damage is a labour intensive and expensive job. The timing chain is located at the rear of the engine, therefore we must remove the entire engine and completely strip down all components to discover and replace all damaged parts to ensure we restore the engine to perfect running order.
The N47 or M57 engine is rebuilt with modified chains, guides and tensioners supplied by BMW to reduce the risk of a repeat failure. If your engine has been damaged by a snapped timing chain, you will require the full engine rebuild procedure, inclusive of BMW parts. Each damaged engine is individually assessed and depending on damage to engine parts, and fluctuations in BMW component pricing, the price may be higher. Early inour workshop specialist was consulted by researchers from the BBC Watchdog programme — they were keen to acquire real-world professional advice on this subject, and some of our engine rebuild customers had recommended us to BBC Watchdog as experts in this subject.
Some of the BMW owners contacting Watchdog had been quoted huge repair costs from BMW and had instead chosen Prestige to rebuild their badly damaged engines. BBC Watchdog Report. It is a skilled and time consuming process to correctly repair an engine damaged by a broken timing chain, cheap solutions will not provide the reliability and 12 month warranty offered by Prestige.
The tables below detail the affected models and engine codes: 2. Further Information on the Timing Chain Failure Issue Early inour workshop specialist was consulted by researchers from the BBC Watchdog programme — they were keen to acquire real-world professional advice on this subject, and some of our engine rebuild customers had recommended us to BBC Watchdog as experts in this subject. Iconic One Theme Powered by Wordpress.First produced inthe M47 engine is a straight-4 engine with a displacement of cc or cc.
All of these engines have been reconditioned at Engine Engineering. We will provide you with a reconditioned M47 BMW engine of the highest quality, guaranteed with a months warranty as standard. Displacement : cc 2.Doctrine of trinity
BMW 3 Series d 2. BMW 1 Series d 2. At Engine Engineering we have worked on many M47 BMW engines over the years and have noticed a couple of common faults.Vba references missing
There appears to be a turbocharger problem relating mainly to the E90 BMW 3 Series d or d where there is a blockage of the crank case ventilation causing the oil pressure to build up within the pan. The oil will not drain from the turbo properly because of the pressurised crank case.
Secondly, we have seen a few engines with catastrophic engine damaged caused the the timing chain snapping or splitting. If this is not caught early the engine can be a complete write off. If you have experienced any problems with your BMW M47 engine please let us know so we can alert future owners. Engine Engineering.The cookie settings on this website are set to 'allow all cookies' to give you the very best experience.
Please click Accept Cookies to continue to use the site with all features activated. The M57 is a water-cooled and turbocharged inline six cylinder diesel engine with common-rail injection.
It is based on its predecessor, the M51, which was a six-cylinder diesel engine with a Bosch VP20 swirl chamber in-Direct injection or IDI as its commonly known, and was fitted to the E34 to E39 td and tds models. The injection pressure is BAR in the 2. The head is a 4 valve design with two chain-driven overhead camshafts that are accessed at the front of the engine, so not an impossible job for maintenance, unlike the later N-series engines.
Both of these have the M57 engine. The plan we had for our d changed as it was built, if we started again we would have built a d as the d has too much power for the championships we race our other cars in, but for endurance type events the 3. We are aware the engine is capable of producing much more power for its modification list but for longevity when spending hours at a time at full throttle, more cooling and less power is required.
We found out the hard way and had to rebuild the entire engine. Most parts are BMW only at astronomical prices, but with some digging we managed to source the correct parts at the right prices.
The most popular tuning engine is the earlier Iron block M47 x20d and M57 from the x30d models, these are a very sturdy unit with not many common issues with the base engine.
The Solenoid injectors in these are much more reliable and are easy to swap to larger nozzles. The TU2 Piezo injectors are not serviceable and are more prone to failure but the main issue we see with these are low deliveries that are only noticeable when you are getting closer to the edge of what the injectors are capable of.
Below we have a list of modifications and their predicted output for the 3. This is mearly a guide and might produce more power on other dynos see our Dyno Blogbut we would like to remain realistic in our estimations and base this upon information gathered from our own tuning.
We will produce another blog for the 2. With just a custom tune the above figures are easily possible if all the standard hardware is in good shape. We also recommend a swirl flap delete at this point but it should be considered at any power level.
The limiting factor is now the turbocharger itself. With the installation of one of our GTDVRK Turbos and a set of d nozzles these engines are capable of getting well into the 's at the expense of a little low end torque but this is not noticeable from the driving seat as the throttle pedal can easily induce power slides in the lower half of the gears.
Common Problems with the BMW 5 Series
The standard IntercoolerExhaust and Clutch will be required to be upgraded to cope with the extra power and torque. The Alloy block TU2 engine already has the same injectors as the d so are not required to be upgraded at this stage.
Much beyond bhp the standard CP3 pump struggles to cope with the fuel required, not surprising as the R70 pump the M57 uses is the same as the hp d's! This is an 'R90' pump which means for each revolution it displaces 0.
We have tested a pump of this size well over bhp on our 2. We also have a BAR Rail Pressure sensor available, but this is not really needed with the R90 pump as its unlikely you will be able to push beyond the standard BAR Sensors range. Its all well and good having as much fuel as you like to make silly HP but it needs to efficiently find its way into the engine.
BMW engines are much better in factory form than VW engines but improvements can still be made, the valves springs are notably soft and whist replacing those, you might as well fit a set of upgraded cams and Head studs.
This can all be done without removing the head. If you are considering replacing the timing chain as well as all this it would be rude not to port the head a little, we don't offer this as a service but soon will! If the GTD turbo is not enough then the next steps will involve custom fabrication and sacrifice of some items like the standard airbox ect, room is severely limited on the BMW engines, especially RHD cars.
Cams, head, headstuds, bigger turbo BMW 2. Recent Posts. You can view that ….BMW N47 is a four-cylinder common rail diesel engine that has many improvements over its predecessor, the M In it was replaced with the B The engine also became available in the 5 Series BMW E60 and E61 from Septemberseveral months after the 5 series was face lifted, during which time the older M47 remained available.
Not long after it became available in the X3 and has since then become available in the X1. The N47 comes as a 1. It was also used in the 3 Series F30 d. This is found in the. In Europe, this particular version is one of the most popular engines in the entire range; the best selling 3 series is the d, while the d is the UK's best selling 5 series.
In OctoberBMW introduced a twin sequential turbo model. It uses the same turbo technology first shown in the E60 d. The N47 engine family is prone to excessive timing chain wear and premature failure. Timing chain failure may call for engine replacement or a costly repair. The most seriously affected units which require the most extensive repairs were produced from At times the failure has resulted in a dangerous cut out of the engine while the vehicle was being driven - sometimes at relatively high speed.
The return spring on the turbo's wastegate was not originally lubricated or covered, this frequently resulted in early failure causing the waste-gate to remain partially or fully open. The problem was described by BMW engineers as a "known fault" and was immediately repaired BMW mobile engineers even carried boxes of an improved springhowever BMW refused to compensate customers for the excessive fuel consumption and denied this fault was their liability.
As the cars equipped with this engine are coming of age, some hoses in the engine bay can start to break down.
If the vacuum hose supplying the EGR cooler bypass valve gets a hole rubbed in it, or breaks down from old age and oil spray, the EGR cooler won't get bypassed during the engine warmup period. This causes excessive buildup in the cooler matrix, and when the engine warms up these solid chunks of buildup can detach from the EGR cooler and get sucked into the plastic intake tube, melting holes in the intake tube, causing a massive boost leak and in very rare cases an engine fire. From Wikipedia, the free encyclopedia.
This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Models from this era suffer from a specific problem, the N47 engine has a weakness; basically the power plant is prone to excessive timing chain wear.
Throughout and BMW owners have reported numerous cases of engine failures, many of which led to terminal decline.
Rattling noises coming from the front of the engine were indicative signs that all was not well. This was closely followed by the vehicle coming to a complete standstill.
What are BMW swirl flaps?
Previously known for their reliability, timing chain failures on BMWs have rocked the motoring industry. Various timing chain problems have been reported by frustrated owners. The most seriously affected units that require the most extensive repairs were produced between 1st March and 5th January Obviously BMW fitted the timing chain to the rear of the engine little expecting the fault to occur. Due to the positioning of the chain though it makes access a nightmare, the entire engine has to be removed, damaged components need to be stripped and new parts fitted as part of the engine rebuild.
If the timing chain fails this causes a major reaction, inlet and exhaust valves smash into the pistons, this results in catastrophic engine failure. If you are lucky the chain simply needs replacing, in most cases the entire engine will have to be replaced. BBC Watchdog brought this concern to light back in June and this is an ongoing problem. He told them he was concerned there was a major manufacturing design fault with the N47 engine.
The latest update seems to indicate issues are appearing with a limited number of engines manufactured after the supposed safe date of 1st March If you are lucky, maintained your BMW service history, and used a BMW-approved garage you might be able to recoup some of the costs of a major engine overhaul.
Accept Read More.Mr McNamara recently took a case, on behalf of a client, against BMW for a diesel engine failure, only for the case to be settled on the literal steps of the courthouse.
According to him, this could mean that the actual number of cases out there is considerably higher than realised. The engine, which was fitted to versions of the 1, 3 and 5 Series, as well as the X1 and X3 SUVs, became a firm favourite with customers, not least because it managed to mix impressive fuel economy with low emissions levels.
If a timing chain works properly, then all is harmonious. Things were made worse by the fact that BMW had originally designed the chain to be maintenance-free, so it was mounted at the back of the engine, effectively under the windscreen. That makes it all but impossible to inspect or repair without removing the engine entirely — a costly and time-consuming job. Customers who had scrupulously kept up their service history with a main BMW dealer were, by and large, helped out by BMW, which paid for new engines to be fitted.
Those who had strayed outside the main dealer network, even those who had gone to recognised marque specialists, were often given short shrift.
If the car is not displaying any unusual running characteristics then there is no need to be concerned. Those people still concerned can see their nearest authorised BMW retailer to have the vehicle inspected. That does not go far enough for many, however. Neil Briscoe. Topics: Motors BMW. More from The Irish Times Motors. Sponsored Keeping well in the coronavirus crisis. Yoga Lab: How to chill out and slow down. Yoga Lab: How to release stress and boost vitality. The future of energy looks bright.
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