Just changed rod bearings

[bigjae46]

Did you take a plastigage measurement?

Remember, you still have a lot of oil in the engine - cooler lines, cooler, filter housing which could have oil in it with lead contamination.

After major work, I fill with Walmart oil, let it run and then drain from the drain plug, pull the cooler lines from the cooler and drain the cooler. Vac out oil in the filter housing and refill with 10w-60.

Do oil changes more often then trend lead levels. You should see lead go down.


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[digger]

the tunnel on the rods looks trashed

[Xmetal]

Did you take a plastigage measurement?

Remember, you still have a lot of oil in the engine - cooler lines, cooler, filter housing which could have oil in it with lead contamination.

After major work, I fill with Walmart oil, let it run and then drain from the drain plug, pull the cooler lines from the cooler and drain the cooler. Vac out oil in the filter housing and refill with 10w-60.

Do oil changes more often then trend lead levels. You should see lead go down.


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I don't think it's lead contamination in OP's case. He did 3 oil changes and still got 30ppm+ of lead. Most/all of the contamination should have gotten washed out by the 2nd oil change. My car was consistently reading 16ppm to 20ppm lead before rod bearing change. This was not just on 1 oil analysis, it was at 16ppm to 20ppm for the last 6 or 7 oil analysis. Then lead reading went straight down to just 2ppm on my 1st oil change/analysis right after swapping in the new bearings.