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- On the issue of preventive maintenance...
- If I open the LEFT tank to check the Siphon Pump, and let's say it is good with no issue, what can I do to prevent O-ring issue? Should I apply a hose clamp around the connection? Should I secure the Siphon Pump better?
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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
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