In December 2014, BMW North America released a voluntary recall («Customer Care Package») relating to issues with
timing chain stretch, fuel injectors, mass air flow sensors, crankcase vent lines, battery, engine vacuum pump, low pressure fuel sensor and revising the oil service interval.
This could be an issue with
the timing chains stretching.
In July 2017,
the timing chain stretched to the point of skipping several teeth and cutting off and idling rough.
A timing chain can last longer, but it is sensitive to regular maintenance: if engine oil is not changed regularly,
a timing chain stretches and wears out.
Not exact matches
Had its
timing chain replaced at the end of 2013 because it was «
stretched».
Chains stretch over
time, making them longer and increasing the amount of slack.
One possible cause might be the 16 - year old, slightly mechanically
stretched timing chain that gets the «right» amount of additional elongation from the warm engine that puts the engine
timing and more specifically the ignition
timing out.
Obviously, any
timing chain will gradually
stretch / wear over
time.
A rattle from the engine may mean a
stretched timing chain.
Could be
stretched timing chains or a problem with the vvt gear,
stretched chains will give an incorrect reading between the cam sensor and the crank sensor (essentially engine is out of
time) and will usually fail to start once
stretched to far, if the correlation between cps and crank sensor if different for I think 5 seconds car will not start
The
timing chain has
stretched and the cam carriers have shattered after only 72,000 miles.
Also, as
timing chains wear out, they
stretch.
More likely your QR25DE
timing chain has
stretched.
Timing chains on this engine may
stretch eventually.
Z4s don't tend to have many common faults, but do make sure the car you're buying has been serviced regularly with documentation to prove, as the
timing chains on some engines can
stretch and snap if they aren't lubricated well.
More likely your right
timing chain has
stretched.
I asked, how do you know this and was told that engine has a design defect in the
timing chain; it
stretches and sometimes break.
They are connected with
timing chain tensioner or
stretching timing chain.
Engines that shut off on the highway without warning,
timing chains that
stretch and fail, and transmissions that give up the ghost are just some of the harrowing issues seen in some late models.
The V - 6's
timing chain can reportedly
stretch, tripping engine - warning lamps and causing drivability issues.
A
timing chain doesn't need to be replaced unless there is a problem with it, however, a noisy or
stretched timing chain is not uncommon in this engine at high mileage or due to lack of regular oil changes.
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