Rear valve cover

2002 TOYOTA HIGHLANDER
180,000 MILES • 3.0L • 6 CYL • 2WD • AUTOMATIC
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PHARMCAT
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  • 9 POSTS
I need to replace the original rear valve cover. I understand that these 1st generation Highlanders had oil sludge problems back then. I don't think I have a sludge problem, but it does use oil. About a quart per 600 to 700 miles. Only at only at highway speeds, but not around town though. Found y'alls videos on spark plugs and throttle body cleaning. Excellant videos! I learned a lot! Thanks
Wonder if y'all could do one on these valve covers?
Jul 14, 2020 at 7:53 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning,

I found a YouTube video for you for the 2005. The 2001 to 2007 are the same.

https://www.youtube.com/watch?v=LlXF9BHhVtI

As far as the usage, the first thing I would do is a wet and dry compression test. From your description of using oil, it sounds like the rings are worn. If they are bad, you will get a difference of 15 pounds or greater on the wet test from the dry test.

https://www.2carpros.com/articles/inner-workings-of-a-car-clutch

Roy
Jul 16, 2020 at 8:29 AM
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