I've just done my CVV, I don't remember seeing any brackets or 'steel line part'.

There's just 7 6mm bolts that fix the CVV to the end of the intake manifold. Are you sure its the CVV you're working on?

Coolant crossover? Do you mean the accumulator?

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Present:
01 X5 4.4i
07 Yam R1

Past:
89 R32 Skyline various mods, running 442 BHP
00 Merc CLK55 AMG
01 E39 M5 Haywood and Scott silencers
02 E46 M3 Supersprint Cats, Eibach Lowered, Thorney Motorsport Remap, running 368 BHP