Yay or nay?

cudamark said

With today's seal technology, there's no need for a felt diaper. If the seals leaking, you need to replace it. The felt isn't going to hold anything in. I only remember seeing those when pulling apart a mid 60's or earlier engine. What modern engine uses one?

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Most modern engines are aluminum and plastic. They are now built to throw away.

Years ago the cars were made to last. Do you think today's cars will be around in 50 years. My 2005 is almost already rusted beyond repair

The newer covers were less material Cheaper to make. The seals could be easily replaced for the same labor cost as the older cover so more money to make. No felt more repairs for more failures.

The way I see it They discontinued the felt for monetary reasons. Had nothing to do with making better seals. had everything to do with money. Front seal was always the same part number.