Timing chain issue ?

ph001 · Post by **ph001** » Thu Sep 20, 2018 1:27 pm

Cooky - did you ever get to the bottom of this?

BRC · Post by **BRC** » Thu Sep 20, 2018 4:47 pm

Forgive me if I missed the confirmation but during this exercise was the serpentine belt removed, I've read and re-read and can't be sure it was.
Really feel for you and truly hope this saga has a happy ending.

Jembo · Post by **Jembo** » Thu Sep 20, 2018 5:28 pm

Absolutely gutted for you.

For my penny’s worth after reading all the thread & everything else that’s been tried, has anyone checked for sticking valves not getting enough oil?

Smartbear · Post by **Smartbear** » Thu Sep 20, 2018 5:43 pm

Jembo wrote: ↑Thu Sep 20, 2018 5:28 pm Absolutely gutted for you.

For my penny’s worth after reading all the thread & everything else that’s been tried, has anyone checked for sticking valves not getting enough oil?

Do you mean the hydraulic lifters? They make more of a “ticking” sound as apposed to the “tinkling, rattle” sound of a flailing chain

Rob

ph001 · Post by **ph001** » Thu Feb 07, 2019 5:19 pm

..just wondering if there was any updates on this one?

Jembo · Post by **Jembo** » Thu Feb 07, 2019 6:24 pm

Smartbear wrote: ↑Thu Sep 20, 2018 5:43 pm
Jembo wrote: ↑Thu Sep 20, 2018 5:28 pm Absolutely gutted for you.

For my penny’s worth after reading all the thread & everything else that’s been tried, has anyone checked for sticking valves not getting enough oil?
Do you mean the hydraulic lifters? They make more of a “ticking” sound as apposed to the “tinkling, rattle” sound of a flailing chain
Rob

Hi Rob, missed yr reply.

Whilst agree lifters are hydraulic, I believed you still have the sprung valve stem for its return.

My thoughts were if there was any minor delay in their retraction after each cycle it’d affect combustion.

+1 on hearing if there was any update

Cooky3 · Post by **Cooky3** » Mon Dec 09, 2019 2:50 pm

Hi people. First time back to this site for a while. No, never did sort the issue. £1,200 in and just drove it through the whole of the summer 2018. The noise was there but didn't effect performance etc. Just had to live with it....

Another post to follow tonight - anybody want a winter project.....?

simonusa0 · Post by **simonusa0** » Fri Jul 03, 2020 4:36 am

Cooky,
I have the same problem! I read through all the posts and couldn't believe that after all the work that was done, there was no resolution.
I got my used certified Z4 in 2006 with 17k miles. I only use it locally in the summer (Michigan winters) so in 14 years it's only at 43k. I've had the exact same rattle symptoms for a number of years (none at idle, short rattle just off idle as revs rise then disappears and I can hear it in teh timing chain case). Don't notice it when driving and it doesn't seem to be getting worse. Looking at my records, BMW service listed 'intermittent engine rattle' at idle in 2008 with cause as DISA valve flap loose and they replaced the valve. Wonder if this was the same noise that came back or this was an unrelated issue... I've lost track.
Thought I'd let you know you are not alone!
Best Simon.

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