Engine noise on start up!

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   Had a slight rattle on start up a few weeks ago in the Sport (525 M50 engine) so I changed the oil (Castrol magnatec) and filter and never heard any thing of it since! Until I just went to go to the shops, a louder clatter from the engine which disapeared straight away.  Am I right in thinking it has hydraulic lifters? has any one experienced this and what was the cause?
Cheers Warren

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W@zzA Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 05-February-2004 Location: United Kingdom Status: Offline Points: 178	Topic: Engine noise on start up! Posted: 23-May-2004 at 14:26
	Had a slight rattle on start up a few weeks ago in the Sport (525 M50 engine) so I changed the oil (Castrol magnatec) and filter and never heard any thing of it since! Until I just went to go to the shops, a louder clatter from the engine which disapeared straight away. Am I right in thinking it has hydraulic lifters? has any one experienced this and what was the cause? Cheers Warren
	1995 E34 525 Sport in Daytona Violet

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e34m5 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 26-June-2003 Location: Near Rugby, Warwickshire Status: Offline Points: 1344	Posted: 23-May-2004 at 14:38
	My 525 Sport (M50 Engine) does exactly the same for a couple of seconds on a cold start, it is the hydraulic tappets before they have pressurised with oil. Nothing to worry about if the noise goes away after a couple of seconds. Miles
	1991 525i Sport Manual