[Filters & Oil] Hdi oil flush?

[jj9]

I think that pulling the sump plug recess out will make it prone to damage!

That depends if the vehicle is fitted with an under engine shield, mine and most others I've seen are.

My first question before I would consider doing this mod would be 'Why was the sump plug recessed in the first place?'

Gravity

That was mine also, and the only reason I could come up with was it had been designed that way to avoid damage to the sump plug, but as above, most vehicles are fitted with an under body shield.

Then I read the technical bulletin that Citroen circulated around it's dealerships detailing the techniques to be employed whilst draining the oil from the 1.6 HDI engine and the quickly came to the conclusion that the recessed sump plug was obviously a bad design flaw. 

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