The BMW Mini diesel engines (N47) have a timing chain design fault – the timing chain is very weak – it stretches over time, and ultimately snaps.
What Happens When A Timing Chain 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 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.
The table below details the affected BMW Mini models and engine codes:
|Model No.||Year Registered||Engine Codes|
|Mini Cooper SD (R56)
Mini Cabrio Cooper SD (R57)
Mini Coupe Cooper SD (R58)
MINI Roadster Cooper SD (R59)
Mini Countryman Cooper SD (R60)
MINI Paceman Cooper SD (R61)
|2010, 2011, 2012, 2013, 2014, 2015, 2016||
Engine Rebuilds by “Prestige German Engines”
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 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.
- Engine Code: N47C16A rebuild cost will be £2,500.00
- Engine Code: N47C20A rebuild cost will be £2,500.00
Each damaged engine is individually assessed and depending on damage to engine parts, and fluctuations in BMW component pricing, the price may be higher.
Cheaper Engine Repair Options
If you are considering other companies offering so called ‘re-manufactured’ engines at under £2,000, our advice is to steer clear or do some thorough research. It is likely these engines are not rebuilt, nor re-manufactured – as genuine BMW replacement parts cost over £1,200 for the N47 engine variant.
It is more likely that the replacement engine will have been recovered from a damaged car – it’s also likely that it won’t have the modified BMW replacement timing chains, guides and tensioners – so they will just snap again…
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.