Brand: Additive took care of knocking lifter - or did it?

  • Article by: PAUL BRAND
  • Updated: June 15, 2013 - 1:00 AM

Q: I have a well-maintained 1998 Toyota 4Runner Limited with 239,000 miles. The truck has been awesome, no more than normal maintenance issues. The problem is one of the lifters is knocking. I hear it in the cabin and can isolate the noise from the back of the driver’s side valve cover. Mechanics want to rebuild the engine of course, but I tried Lucas fuel additive, which made the knock go away. Is this an issue I need to be concerned about? I love having no car payments, so I am willing to put a little money into it.

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