I don't think the plastic is strong enough to hold the weight of the rubber hose, especially where it bolts to the engine. These little ears that hold the pipe on break easily. This is what I'm warning about, breaking the ears.
I also don't think the plastic tube is thick/strong enough to use a worm-drive clamp and that's why Porsche just uses a tension type hose clamp.
Full picture link (large) from the tutorial shows how close the pipe is to the stater. Be gentle with it.
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