Originally Posted By: CKN
Originally Posted By: clinebarger
AFM Lifter Failures are quite common, It is not a oil related failure, They fail just the same on spotless well maintained engines & Varnished abused engines. Cylinders #1/#4/#6/#7 have the AFM lifters, It is ALWAYS one of those cylinders with issues!
My shop does several AFM/DOD deletes a year on 5.3L/6.0L/6.2L Gen IV engines, Trucks/SUV's are TOO EASY! A good Tech can do it in 8 hours, To bad GM dealers have no interest in fixing these engines.
They sell 40,000 units a month of these trucks Silverado/Sierra combined. The vast majority have the 5.3. I am guessing the numbers of failed motors you see pale in comparison to numbers sold and how many are on the road since AFM has been implemented is quite small.
Bingo! You only hear about the bad ones one the internet. Most people just dont randomly post that they have a AFM 5.3 that has xxx,xxx miles problem free. I see so many of these trucks running around and on car lots. My 2008 had 125,000 miles when I sold it and now it is nearing 200,000 and the owner is towing a travel trailer with it. They are retired and just travel most of the time. I ran Valvoline Synpower and he is using Valvoline High mileage and the motor has never been opened, Heck it still has the original valve covers. It is the 5.3 LMG flex fuel version, iron block aluminum heads.
Originally Posted By: clinebarger
AFM Lifter Failures are quite common, It is not a oil related failure, They fail just the same on spotless well maintained engines & Varnished abused engines. Cylinders #1/#4/#6/#7 have the AFM lifters, It is ALWAYS one of those cylinders with issues!
My shop does several AFM/DOD deletes a year on 5.3L/6.0L/6.2L Gen IV engines, Trucks/SUV's are TOO EASY! A good Tech can do it in 8 hours, To bad GM dealers have no interest in fixing these engines.
They sell 40,000 units a month of these trucks Silverado/Sierra combined. The vast majority have the 5.3. I am guessing the numbers of failed motors you see pale in comparison to numbers sold and how many are on the road since AFM has been implemented is quite small.
Bingo! You only hear about the bad ones one the internet. Most people just dont randomly post that they have a AFM 5.3 that has xxx,xxx miles problem free. I see so many of these trucks running around and on car lots. My 2008 had 125,000 miles when I sold it and now it is nearing 200,000 and the owner is towing a travel trailer with it. They are retired and just travel most of the time. I ran Valvoline Synpower and he is using Valvoline High mileage and the motor has never been opened, Heck it still has the original valve covers. It is the 5.3 LMG flex fuel version, iron block aluminum heads.
