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#35
06-02-22, 03:15
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piston ring question
I wanted to revive this post to ask for some input from our knowledgable membership pool. I have been hunkered down at home (like many of you) for a long time now, and have been using the time to get some longstanding jobs finished. One job has been to continue to sort through and catalogue my collection of engine parts. One item I have found raises questions so here goes;
I have a bunch of sealed ring packages for the 975 that are described (in one book) as being "tinned". They are light coloured and almost look like they have been spray painted with aluminium paint. The coat seems to wear off or rub off relatively easily. I have attached photos where you can see the cast iron base material beneath the coating. These spots are not corrosion. Does anyone know anything about tinned rings, application, pros and cons? Any input appreciated. C4ringsa.jpg C4ringsb.jpg RIngs2.jpg RIngs3.jpg 
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