1999 GMC Yukon engine flush

1999 GMC YUKON
130,000 MILES • V8 • 2WD • AUTOMATIC
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FLHAND
  • MEMBER
  • 1 POST
my wife had our engine flushed & about 200 miles later the motor had a tapping sound coming from the crank case. I believe it is the crank bearings that spun from the engine flush. I need expert advise.
Sep 3, 2009 at 9:54 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
The engine flush shouldn't have caused this type of problem. However, one never knows. I need to know something. A bearing will make a knocking sound and not a ticking. A lifter or rocker will tick. Which does it sound more like?
Oct 5, 2009 at 11:21 AM
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