Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Part number for sump plug seal

Yes. The mechanic art form can get pretty picky! (aka anal)

For example, what you are buying and Richard's posted set are not, per se, crush washers. They are merely plain copper washers. They are designed differently. I use them for spacers, for which they are ideal.

Here is what google says verbatim to a question of "crush copper washers versus copper washers".

"Copper [b]crush washers are designed to plastically deform (aka squish) under pressure to create a
high-integrity, leak-proof seal for, say, oil drains or high-pressure lines. Standard, solid flat copper washers serve
primarily as spacers or static, low-pressure seals, merely distributing load rather than deforming to fill gaps" [/b]

This little bit reflects my experience with the sump you and I use. Rimmer and other specialist sell crush washers specifically for your Morgan under their part number 213961a which replaced the original 21396, one of the original numbers for the correct washer . https://rimmerbros.com/Item--i-213961A However, as the French say, "Chacun à son goût". And little leaking at the sump plug is something that can be tolerated by most people 'cept the odd nutter like me and Concours players. Manufacturers, change these little thingies as costs change. https://www.macrotrends.net/1476/copper-prices-historical-chart-data Economists call it "hidden inflation".. namely holding the product price steady but degrading product quality It has become the most common expression of inflation for the last few decades. Manufacturers know that inflation is politically unpopular and have adjusted accordingly. Rimmer also sells plain copper washers. I show both types below. The difference, in layman's language, is that the plain copper washer, in this usage, will not deform as much to compensate as much for anomalies specific to your sump and plug.

Lorne