Quote:
Originally Posted by zenohua
As title suggest, I have encountered the infamous cold start engine ticking noise. Previous owned 2016 F80, never experienced such sound. After taking delivery of a 2017 CPO M4 Competition with 17000kms(11000 miles), I immediately heard the S55 clicking noise after cold start.
I have searched all the forums and sought help from local BMW groups about this issue, however the answers varied dramatically. Thus I hope this thread can help other forum members how to deal with this problem.
This ticking noise is not the valvetronic sound when you press unlock button or open Driver's door or trunk/boot before start the engine. It happens after car has been sitting overnight and only happens during 3-5mins after cold start. It will not produce the noise when car is warm.
So, after dealer acknowledge the sound, service manager told me the engine from factory has not tighten the bolts right, they need to re-torque some of the bolts from exhaust camshaft. In that case, the valve cover needs to be opened and engine timing has to be adjust as well. It took them 3 days to verify and fixed this issue. All in all, never heard the ticking noise again.
Some earlier threads have huge different out comings regarding this issue. Some members have their engine replaced, some changed to different brand/viscosity of oil, some have all their lifters replaced. I believed forum member "fabulousprofound" have already post the same solution that can solve this problem.
Links:
https://f80.bimmerpost.com/forums/sh....php?t=1472448
https://f80.bimmerpost.com/forums/sh....php?t=1209356
https://f80.bimmerpost.com/forums/sh....php?t=1492128
https://f80.bimmerpost.com/forums/sh....php?t=1197634
https://f80.bimmerpost.com/forums/sh....php?t=1448323
https://f80.bimmerpost.com/forums/sh....php?t=1292458
https://f80.bimmerpost.com/forums/sh....php?t=1284512
https://f80.bimmerpost.com/forums/sh....php?t=1359890
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hi man
I have exactly the same issue.
Do you know what the consequences of this are? Is it just noisy or does it cause other things besides the noise?
And in the dealer , only the collar screws are replaced and torqued, right? they need torqued like oem? 20n and 90 degrees ?
And why did they replace the gasket ring and buffer of the injectors? In the work of strengthening the camshaft there is no need to take out the injectors as far as I know.
I regret the many and difficult questions, I have the same problem and it is important for me to understand as much as possible before I put the vehicle in the garage to fit it.
thanks !!