10-16-2010, 09:22 AM
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#26 (permalink)
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A True Z Fanatic
Join Date: Mar 2009
Location: North East
Posts: 6,203
Drives: 09 370Z Sport M6
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Quote:
Originally Posted by Lug
Nissan changed the way it made bearings (dropped lead out of the formulation) and as a result saw a rise bearing failures at sustained temps over 300. 280 was the point they decided was a good place to limit to give themselves a bit of a buffer. I have no idea oif other car companies have done the same thing with their bearings.
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Many vehicles see bearing failures at sustained 300+ temperatures. The oil thins out so much that it can no longer provide adequate film protection to vulnerable parts like bearings. A few weeks ago I was at a hot track event with a C5 Corvette that was continually pushing 300+, and sure enough a few sessions in he had bottom end engine failure.
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