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318i Valvetronic question

 
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Timo



Joined: 07 May 2001
Posts: 96
Location: Cape Town, South Africa

PostPosted: Fri May 18, 2007 4:26 am    Post subject: 318i Valvetronic question Reply with quote

My "new" 318i touring has the 1995cc valvetronic 4 pot engine. Its a very different engine to the 1796cc 16v unit in our e36. Overall its much quieter, except on startup when the vehicle has been standing for a several hours, eg in the morning after a night in the garage. On start up it makes a horrible (to my ears at any rate) rattle for a maybe 2-3 seconds before it goes quiet. Therafter it can stand for eg 15 mins and is quiet on startup. It sounds to me as if the engine hydraulics are dry and take a few seconds to prime themselves and buld up pressure on startup. I haven't actually timed how long it needs to stand before the noise recurs on startup, but imagine that its a few hours.

The car still has a Motorplan, fix anything service plan for a while, so if this is a fault, I'd like to get bit sorted out by BMW SA. Anyone have any idea whether this engine normally makes this noise and if so why? Question
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Steel Gray 02 318i Touring 86 000 km
Samoa Blue 1996 318i 196000km Diamond Black 1991 318i 315000km
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Timo



Joined: 07 May 2001
Posts: 96
Location: Cape Town, South Africa

PostPosted: Fri May 18, 2007 9:29 am    Post subject: Had some input from BMW SA Reply with quote

Took it in to one of the local BMW agents, The Service advisor says that the valevetronic engines have some peripherals that make a noise on start up, such as the exhaust air pump but that it could also be a normal loss of oil pressure on the valve lifters overnight. Either way, no cause for concern.
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Steel Gray 02 318i Touring 86 000 km
Samoa Blue 1996 318i 196000km Diamond Black 1991 318i 315000km
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