Blown Spark Plugs
Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW 8 Series
Forum Discription: This forum will deal with any issues on the E31 BMW 8 Series
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=48516
Printed Date: 20-April-2024 at 10:40
Topic: Blown Spark Plugs
Posted By: Rays840Ci
Subject: Blown Spark Plugs
Date Posted: 05-October-2011 at 20:29
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I`ve got a 840Ci,161K Mileage with All BMW Service History,& having enjoyed the Car for the Last Year, have just started to Have 2 Spark Plugs Blow out of the Engine. Does anyone have any Ideas as to the Cause ? My own knowlege / Information is that this is usually due to the Plugs Being fitted, Overtightened, or Not Being Tightened enough. I would Appreciate, Any & All Responses. ------------- 8 Series Luv |
Replies:
Posted By: Sporty1
Date Posted: 06-October-2011 at 09:40
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Undertightened and they have worked loose (easily solved), overtightened and this has screwed the threads in the head, cross threaded and the same has happened or they are the wrong plugs that some one has tried to fit and again thread damage has occured ( more involved to sort out). ------------- 
Sport Evolution Schwarz #043 |
Posted By: Andrew Rolland
Date Posted: 06-October-2011 at 15:33
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What are the threads like on the spark plugs that have blown out? This might give an idea of what has happened. How often do your spark plugs need changing? http://www.bavarian-board.co.uk/forum_posts.asp?TID=47661&PN=1" rel="nofollow - Mine have been swapped after 60,000 miles and are still good for another 60,000 miles. Might be worth putting long life spark plugs back in that way you don't need to mess around with them if something is wrong with their fitment
Could be a number of things like Sporty has mentioned.
I have visions of Jeremy Clarksons Mazda MX5 from the Last Christmas Top Gear special. ------------- Be exclusive and drive a Petrol 5 Series! Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto |