Chevrolet lifter noise, engine knock sound from Collapsed AFM DOD lifter. This release trick will save you Lots of money. Fix that pesky lifter tick with this technique I have done it on many vehicles for the last 2+years. This might appear to be a temporary fix but I assure you it is typically a long term solution.

Share this with all your GM V8 friends and if you don't have this Issue yet or still have warranty get yourself the Range device https://amzn.to/2REouzc Note: (This is NOT a Tuner!) just prevents vehicle from entering 4cyl mode and a much cheaper more permanent option is to use www.lt1swap.com and I highly recommend the permanent option.

Be sure to check out my website for all sorts of helpful AFM/DOD related things.

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Automotive technician