Be sure to read the repair instructions; After replacing the BMW N20 timing chain, add new oil to the engine. Copyright Prestige 2020. Keyless theft: What is it and how do you stop it? The opinion of car owners on replacing the timing chain in the BMW N20. So it is best to replace if you have the 10 second rattle noise after starting the engine from cold. Extra259.00 inc vat (Front subframe has to be lowered to remove sump). It is more likely that the replacement engine will have been recovered from a damaged car its also likely that it wont have the modified BMW replacement timing chains, guides and tensioners so they will just snap again. The BMW inline engines are driven by a chain that links the timing of the camshafts to the rotation of the crankshaft. BMW have offered to pay 50% of the parts cost but are still quoting 7,000 for the repair, despite full BMW service history. Repairing the severe engine damage is a labour intensive and expensive job . My 09 plate 74,000 mile BMW 118i has just been diagnosed as needing a new engine by BMW Maidenhead as a result of the timing chain tensioner failing and getting sucked into the rest of the engine, causing damage. The tables below detail the affected models and engine codes: What Happens When A Timing Chain Snaps? At this point it will bend all 16 valves, shatter the rocker arms, snap and distort both camshafts and the camshaft housing. The engine timing chain is very weak it stretches over time, and ultimately snaps. With new car demand down, we see some newcomers to the best-selling list. Most complaints of this fault are a scraping noise from the engine or red oil pressure warning light flashes on from time to time. N43 Timing chain & guides replacement 499.00 inc vat. Meaning the timing chain does not fail on the model, but the plastic timing chain guide becomes brittle & breaks up filling the engine sump & oil pump strainer. BBC Watchdog were producing a feature on the BMW timing chain failure issue, having been alerted by many unhappy BMW owners. Wide choice of models, improved from 2007 with Efficient Dynamics. These engines are also prone to excess engine oil consumption, caused by worn valve stem seals allowing engine oil to vacuum bypass into the cylinders. impee shows you how to replace a BMW 3 Series e46 N42 Timing Chain Tensioner in a short DIY video Visit BMW E46 / N42: Timing Chain Tensioner, Comparing and Testing The tables below detail the affected models and engine codes: 1299.00 inc vat (Not including Clutch & Dual Mass Flywheel, or Automatic Transmission Fluid & Filter). My car isn't reliable and keeps refusing to start. Beware of cheap remanufactured Engines and rebuilds Prices: Professional labour costs for Timing Chain Tensioner replacement - 35 (private) or 165 (BMW) - per hour X 0.5 hours In some cases, the alternator drive belt can be worn/ cracking from age. Premature timing chain failure has become a serious problem for many BMW owners the issue has been featured on BBC Watchdog and is regularly discussed in BMW forums and other media sites. Great to drive and superbly built. N12, N14, N16, N18 Timing chain replacement 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. My mileage is creeping up a lot and the car has now clocked up 100,000 miles. Call 01425 277800 to book your car in for a service. Engine Rebuild Costs The most common is the N47 4 cylinder diesel engine, fitted to most small engine BMWs from 2007 to 2014. 118d is super economical. The third is the N43 4 cylinder petrol engine, fitted to small engine BMWs from 2007 to 2012. See: I'm considering buying a 2010 BMW 118 M Sport Diesel Automatic with only 16,000 miles on the clock. 899.00 inc vat (Not including Clutch & Dual Mass Flywheel), BMW N47 Automatic Timing chain replacement BMW N47 Manual Timing chain replacement The damaged engine is rebuilt with genuine BMW components including modified chains, guides and tensioners to reduce the risk of a repeat failure. The Watchdog researchers were keen to acquire real-world professional advice on this subject some of our engine rebuild customers had recommended us to BBC Watchdog as experts in this subject. With Automatic vehicles, it is recommended to replace the fluid & filter pan whilst removed. The timing chain, guides and tensioners are all modified and often second hand replacement engines will not have them installed so you may think you are getting a good re-manufactured power plant but instead it could be from a broken or salvaged car with old type components and you could suffer poor reliability or worse another failure. The History of BMW Timing Chain Failure DIY Timing Chain Tensioner Replacement impee's DIY Timing Chain Tensioner replacement for BMW 318i e46 How to replace the Timing Chain Tensioner yourself! It is a skilled and time consuming process to correctly repair an engine damaged by a broken timing chain, cheap solutions are unlikely to provide the reliability and warranty offered by Prestige. 499.00 inc vat, N13 BMW Timing chain replacement We tell you how. Can you tell me if it has a timing chain and if so when would be a good time to change it? Plastic ages in 5 years This rattle grows louder as time passes and may become more noticeable at slow speeds. With manual vehicles, it is recommended to replace the clutch & dual mass flywheel whilst removed. A UK wide car collection service - call now for a competitive quote, 12 months warranty for all BMW engine rebuilds. The N57 is the 6 cylinder version which also has the same chain setup. If the timing chain & guides are replaced before this fault occurs, this will save the labour removing the engine sump to clean & remove the broken parts of the failed chain guide. Coronavirus: Can I buy a car during the Covid-19 lockdown? We use a special to that allows us to replace the valve stem seals without removing the cylinder head, making the repair very cost effective! With the age of these vehicles/ engines creeping up. This is a common failure of the N43 engine and if they are quoting 7,000 it't the usual amount without any help from BMW. The chances are, the engines are not rebuilt, nor re-manufactured, as genuine BMW replacement parts cost over 1,200. 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