This is a great idea Alastair but I don't think I could access the inside, its not a strait line and goes up 90 degres right after the elbow.
Another thing would be to bash the outside perhaps and break the ceramic, but if some parts are still to large to pass through the pipes that might be a bother?
I'll see if I can take it out first, it look tricky as there is a funny clamp that seems to need a specail tool???
Olivier

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E300TD year 2000. RUSTY SOLD
cost a fortune to maintain on the road
but run well on WVO
Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long?
Third lasted a month then went away...
Fourth now... Corroded too...