2004 Chevy Tahoe Z71 – lifter failure

Dear Doctor: I own a 2004 Chevy Tahoe Z71 with the 8100 Vortec engine. It’s been well maintained and has 55,000 miles on it. Recently I brought it to the dealership after it began making a loud rapping sound coming from the top part of the engine. The dealership diagnosed the noise as coming from the lifters. To repair it would be quite expensive. Do you think the motor could seize on me if I ignore the problem? Are there cheaper alternatives to a major engine repair?
Brendan


Dear Brendan: At 55,000 miles with the large 8.1-liter V-8 engine, lifter failure is rare. The engine should not fail or seize. I would suggest a second opinion. You can also upgrade to full-synthetic oil that reduces engine moving part friction. To replace the noisy lifter is not a major expense if needed. I would recommend the repair if you plan to keep the vehicle.

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