Quote:
Originally Posted by quicktwinturbo
What would be typical sign or symptoms of bad rod bearing in early phase?
|
Regular oil analysis will show increasing levels of lead & tin, as the bearings wear more there will start to be increasing copper levels.
But since this appears to be a design flaw and a problem which results in bearing wear over many thousands of miles rather than a sudden failure over a short period of time, it's likely that oil analysis will show elevated lead and tin levels pretty early in the car's life. It's only when you start to see copper that you'll know the top layer of the bearing has been worn through.
As the bearings wear and oil clearance increases you might see a drop in oil pressure at idle where the oil pump isn't as efficient, but that would take a lot of wear to get to that point. My guess would be that there are not any symptoms, but that's better answered by people who have had excessively worn bearings replaced, I'm just making a blanket statement that applies to most engines with early stage bearing failure.