Engine performs well but is very noisy on tick over sounds like a diesel
SOURCE: engine making ticking sound when hot
the internal combustion of the main valve is most likely either clogged or it has a loose spark plug that is constantly providing a spark without oil. Either that or your break pads have gone bad or just some seats and stuff loose, I'd have it checked on by your nearest professional.
SOURCE: 2002 hyundai santa fe - engine noise ticking
The cam chains have developed slack and are slapping on the cam chain guides which helps prevent the cam chains from popping off in case of slack developing . The chain guides are made of some type of plastic material and develop significant wear.
SOURCE: 2002 jeep grand Cherokee loredo 4.0 straight 6
On a high mileage engine you should use 10w 30 NORMAL oil not synthetic.
SOURCE: 2006 BMW 3251 loud ticking sounds from engine
this is a very common issue with any of the bmws with n52 and n52k engine,as long as oil level is ok and is being changed regularly than than a "blleding proceedure" may solve this problem, when the engine has been running long enough that it is hot run the engine at idle to 4500 rpm for 10 to 12 min to start, if is still present after this attempt again.It has been said that this could take up to 30 min at longest.The reason for the ticking noise is a very tiny air gap in the hva and or lifters, try this and if does not work than the lifters should be replaced, although this noise doesnt really hinder the performance it does take away from driving such a nice car and having a loud noise come from the engine, good luck
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