I had an old breather tube on which the insulation had deteriorated, and a fairly new one.
I cut off the part that fits into the valve cover on the old breather tube. The tube is wider on this end due to the plastic fitting which was inserted, which also adds strength and makes the outer diameter of the tube closer to the fitting on the breather valve.
Then the insulation from the newer breather tube was slid over to connect the tube to the valve--which has the grommet attached to it. Due to adding the breather valve on the end, the tube was now too long, so I cut off about 1 1/2" from the bottom.
Then I slid on the grommet and lower piece of insulation.
I am very happy with the new breather arrangement. It looks original and does the job without getting in the way of other parts.
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DON'T MESS WITH MY MERCEDES!
1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles