I have changed about 7 or 8 spin ons on my 300D in the last 5 months or so, because of WVO and algae bugs in the tank. I even just changed one tonight in like 2 1/2 minutes in a parking lot on the way to dinner.
I have never had any type of fuel leak or any trouble with washers O-rings or Orange silly putty on my housing. I don't even see any washers or O- rings on the bolt or housing.
After reading this thread I am considering using the spin on housing to fill my tank instead of the traditional fuel door in the rear. How do I get my housing to start leaking like everyone elses???
(:

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'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."