Technical Heater Hose Leak - what clamps to use?

[garyjpaterson]

I have a small leak from one or both of the heater hoses, where they are clamped.

How likely is it the hose(s) have failed? They seem in reasonable condition, but with tightening the clamps not doing it, what else can it be? Perhaps the metal pipes to the matrix are corroded underneath? I did check on the interior side and all looks good there.
Also, does anyone know what clamps were used from factory? Not sure if mine are correct or not. Not sure what type is most likely to do the best job.

Strangely the ePER diagram seems to be fairly incorrect, or at least confusing. The hoses are part code 2 and 7, though are nothing like they appear in the diagram (none of those bulky 90 degree corners, for starters)

Here are what they actually look like. Part code 2, number 51831614, which annoyingly comes with the bleeder valve and another pipe, making it more expensive

And then part 7, number 51787324. Just a normal hose

Wondering if anyone has had a leak here before? Can't find any through searching, seems the heater matrix's themselves seem to go more often.

 

[jrkitching]

Also, does anyone know what clamps were used from factory

Those jubilee clips are not original, so it looks like someone else has had the same problem before.

 

[Herts Hillhopper]

Often the drawings in ePER are ‘not quite right’ — adds to the guessing game to decide if you’re really ordering the correct bits