Quote:
Originally Posted by 97 SL320
It is completely acceptable to use a soft crush washer or rubber bonded washer for what you are doing.
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As it turns out, others who have same car have confirmed that, as with my car and epc, the oil cooler never had a seal washer on the drain plug. Presumably the aluminum boss is soft enough to make a washer unnecessary.
By the way, what little cone there is under the hex head is same diameter as the threads, so that is not how it seals.
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Graham
85 300D
,72 350SL, 98 E320, Outback 2.5