740 Floppy oil trap hose

So bought a replacemet S-shaped hose that goes on the top of the oil trap as I thought mine was bad as it was rock hard. Thing is, this new one is rather floppy. As in I wonder if it has collapsed and now is restricting the flow. Are they that wiggly or should I find a better source for it?

Volvo was the only quality source of that hose. The aftermarket ones are too soft to last long and the quality of the material is low. As you now know.

Shouldn't collapse since it's not under vacuum.

PCH said:

Shouldn't collapse since it's not under vacuum.

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There is vacuum at idle through the small hose. At speed during cruise the larger pcv hose pulls some vacuum as well.

I think the small vacuum hose just pulls some of the crankcase gases into the intake- it does not create negative pressure in the larger hose or anywhere else in the system. At any time there is probably more blow-by through the rings than that little hose can pass even under high manifold vacuum, plus the larger vent hose will not allow negative pressure. You are lucky if the system can relief enough pressure and not have the dipstick pop out.