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starting prob on 728i e38

Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW 7 Series
Forum Discription: This forum will deal with any issues on the BMW 7 Series (E23, E32, E38, E65, E66, E67 & E68)
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=28553
Printed Date: 29-April-2024 at 21:18


Topic: starting prob on 728i e38
Posted By: jay728i
Subject: starting prob on 728i e38
Date Posted: 21-March-2006 at 17:17

hi guys,

can any body help ?when i start my bmw e38 it makes a right banging noise when its cold .if i run it it starts without a bang when its warm.

the bang is in the engine ive had a new starter motor and checked the fly wheel for damage but nothing.it does start first time but the bang is really . can anybody help me pllleeeeaaasssseeeeee.

thanks jay728i



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j


Replies:
Posted By: Del64
Date Posted: 22-March-2006 at 13:59
Need some details of the age mileage and exact engine if single Vanos or double Vanos. I need also the quality of the engine at a "stone cold" idle is it lumpy?

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2009 520d SE Business Edition

Never argue with an idiot, they drag you down to their level, then beat you with experience.

Posted By: jay728i
Date Posted: 23-March-2006 at 12:02

hi thanks for response its a 728i m52 engine the milage is 166000 with full sytner bmw history at stone cold the idle is sometimes not all the time lumpy .

not sure about vanos

jay



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j

Posted By: Del64
Date Posted: 24-March-2006 at 03:53
I suspect that at worst the banging noise is coming from piston slap if,,, it is internal. Can you do a compression check on all six cylinders? that will show any leakdown in the bores

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2009 520d SE Business Edition

Never argue with an idiot, they drag you down to their level, then beat you with experience.

Posted By: jay728i
Date Posted: 24-March-2006 at 11:07
thankyou derek i will book it in for compression check asap and see if it is that

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j

Posted By: eta.
Date Posted: 24-March-2006 at 15:17
If the car has full Sytner history, push for a BMW goodwill contribution to any work required.

Posted By: jay728i
Date Posted: 27-March-2006 at 14:26
do you think they would honour that?

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j

Posted By: eta.
Date Posted: 28-March-2006 at 11:00
Yep. Be reasonable, but assertive. If your dealer will not play ball, write to BMW GB and tell them you want their Zone Technical Manager to inspect the car on their next visit to that, or another, dealer.

I was told that some 728's were affected by the Nikasil issue.

Posted By: jay728i
Date Posted: 29-March-2006 at 09:19

thanks for that .what is the nikasil issue?

 



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j

Posted By: eta.
Date Posted: 29-March-2006 at 09:25
Cylinder linings having premature wear from sulphur rich petrol. Mainly an issue with V8's. Do a search for nikasil at the very top of the page.


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