Hi, 2005 z4 approx. 190k miles. Bought car 3 months ago used looking over the maintenance history. (all serviced by BMW indi). I don't see a mention of the Vanos or clutch work. However, I feel no slippage in the clutch. No noise or issues when shifting and car pulls really strong in all gears. No oil leaks or issues with burning oil or any exhaust smoke. As of late only after car is hot say after a 30 min run. On restart after say 30 min period of rest. The car sounds like marbles in a can at idle. Clutch in or out no difference in sound when having issue. However if I rev it a bit the issue goes away car runs strong and Idles like there was no issue. Has me perplexed as doesn't happen all the time? History shows oil changes every 3k. DISA was replaced but was after all this started. Car is not a daily used for pleasure if weather permitting. So a occasional weekend summer driver. Will be putting it up in winter. Would like some thoughts as don't want to replace part not needed if can help. Ie replace Vanos if it might be the clutch. Plan is to get Vanos done as after reading post it is way over due.
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