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Engine more varnished on one side


Joined
Jun 27, 2023
Messages
8
City
Kansas City, MO
Vehicle Year
2007
Transmission
Automatic
Got my Ranger 4.0 last September with 150k miles on it. Just about a month ago the left cassette decided to give up, causing the dreaded timing chain rattle.

I am in the process of replacing my timing chains, guides, and tensioners and I noticed that the left side (driver's) cam, valve springs, etc are significantly more varnished looking than the right (passenger side).

Is this cause for concern? Do I need to try cleaning out the oil tube? Or is it likely that the passenger side had been rebuilt?
PXL_20230627_154435227.jpg
PXL_20230627_154441440.jpg
 

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