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Discussion Starter · #1 ·
Last May 2020, I had work done to my truck (replaced timing chain guide, water pump, and right valve cover). 2 weeks ago, about ¼ of the valve cover tore clean off (in back, towards inside of truck). What would cause this to happen? Could it possibly have anything to do with the work I had done in May?
 

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From what you describe , I'm guessing the timing chain has been slapping about and destroyed the cam cover . Case of stripping it down and checking it out for cause and very possible further damage .All depends on what caused the original damage to cam box , what was authorised and recommended in repairs at that time . whether chain had excessive wear and should have been replaced . Also depends on who did the work , mileage since repair almost a year ago and what warranty given . Another possible cause could be a chain tensioner failure especially if chain stretched and at it's limit .
 

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Discussion Starter · #5 ·
From what you describe , I'm guessing the timing chain has been slapping about and destroyed the cam cover . Case of stripping it down and checking it out for cause and very possible further damage .All depends on what caused the original damage to cam box , what was authorised and recommended in repairs at that time . whether chain had excessive wear and should have been replaced . Also depends on who did the work , mileage since repair almost a year ago and what warranty given . Another possible cause could be a chain tensioner failure especially if chain stretched and at it's limit .
Thank you. My friend had the same thoughts.
 
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