Quote:
Originally Posted by Redd
My key takeaways from the article were:
1. Wear showing copper is normal. The copper is an lubricating layer to protect the components. Mahle does say it is ok to replace the shells at that point.
2. Due to normal workshops not having the equipment and tolerances of a raceshop, it is ok to have more clearance for the bearings.
I'm not an engine expert but I am an engineer by education and interest. Corrosion wear does not bear friction marks at one specific area in one specific direction like we see on worn bearings. Only one thing does that - bearing to metal contact.
I think it's important to note that Mahle as the manufacturer of said bearings will of course present the information in a way that makes them look good. I work in Product Management and know when I'm reading a product brochure. So pardon me if I don't read the article the same way that some of you do.
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It’s also important to note that Mahle did not specifically state all bearing failure causes are due to corrosion. This brochure was specifically targeted at the corrosion piece. I’m no engineer, switched to finance as one does, but I would think oil degradation/contamination is certainly a leading cause.