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The BMW Range
5 Series
E39
Water Gone Into Engine
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<blockquote data-quote="fabianyee" data-source="post: 486613" data-attributes="member: 6"><p>The M52 aluminum alloy block has this weakness whereby the cylinder headbolt thread will come off or loosen due to age and overheating... When this happened, the engine would overheat randomly and also water would find its way into the combustion chamber. The solution is to bore out the thread hole and put in a metal insert (or heli-coil) for the thread. And to do that means time for top or complete overhaul...</p></blockquote><p></p>
[QUOTE="fabianyee, post: 486613, member: 6"] The M52 aluminum alloy block has this weakness whereby the cylinder headbolt thread will come off or loosen due to age and overheating... When this happened, the engine would overheat randomly and also water would find its way into the combustion chamber. The solution is to bore out the thread hole and put in a metal insert (or heli-coil) for the thread. And to do that means time for top or complete overhaul... [/QUOTE]
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Water Gone Into Engine
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