2007 Silverado 6th cylinder crashed, have 2018 Silverado now...

[ripcurlksm]

I had a 2007 Silverado that ran perfect until 240k miles where the mechanic told me the 6th cylinder crashed/broke and it was likely due Chevy AFM. Since then I replaced my truck with a new 2018 Silverado and I made sure to install the AFM delete via OBD port the first week. I know there were early issues with AFM, burning oil, etc that are not present on recent models.

 

All I want to know is

(1) Is it likely that AFM was the reason my 2007 Chevy blew the 6th cylinder?

(2) Should I keep the AFM delete installed on my new 2018 Chevy for the only purpose of mitigating the risk of blowing another cylinder in the future?

(3) Beyond regular maintenance using good oil/filters, what can I do to keep my 2018 engine running as healthy as possible to prevent another cylinder crash or other catastrophic engine issues?

Edited October 2, 2020 by ripcurlksm

[ammoaddict]

My son in-law has a 2010 Sierra with over 100,000 miles on it and has had no issues with the afm.

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[CamGTP]

The mechanic needs to be more specific about what actually happened, just saying is crashed means nothing to me and I know a fair bit of these failures.

 

Most common issues are that the lifter fails, collapses and causes a permanent misfire until the parts are replaced. The lifter can also fail by spinning in the lifter tray and damaging the camshaft lobe, bending a pushrod and breaking stuff. Sometimes even the piston rings fail and you get massive oil consumption. The 2007-2009 model year trucks seem to have got it pretty bad on some failures.

 

Keep the AFM off in your new truck if you want, it doesn't make a big difference. The less the parts are used you would assume the less chance at a failure. But you have to remember that the parts are still there and "could" have an issue someday. Every vehicle runs that risk and the likelyhood of a problem is always very small in the long run.

 

 

Do regular maintenance on this new truck of yours and it should be just fine. Enjoy the better interior and fuel mileage.

[Lsgun1]

If your old truck made 240k with no issues I think you know what you are doing maintenance wise so keep it up! Also I run the same Range module to keep V4 mode off simply because I don't like it. Will it hopefully keep any lifters from having problems? I don't know, I hope so.

[Black02Silverado]

Agree, you maintain your vehicle well.  This new one should last just as long.

[Bill D]

Use synthetic oil, less sludge less wear better gas mileage 

[ripcurlksm]

On 10/1/2020 at 5:33 PM, CamGTP said:

The mechanic needs to be more specific about what actually happened, just saying is crashed means nothing to me and I know a fair bit of these failures.

 

Most common issues are that the lifter fails, collapses and causes a permanent misfire until the parts are replaced. The lifter can also fail by spinning in the lifter tray and damaging the camshaft lobe, bending a pushrod and breaking stuff. Sometimes even the piston rings fail and you get massive oil consumption. The 2007-2009 model year trucks seem to have got it pretty bad on some failures.

 

Keep the AFM off in your new truck if you want, it doesn't make a big difference. The less the parts are used you would assume the less chance at a failure. But you have to remember that the parts are still there and "could" have an issue someday. Every vehicle runs that risk and the likelyhood of a problem is always very small in the long run.

 

 

Do regular maintenance on this new truck of yours and it should be just fine. Enjoy the better interior and fuel mileage.

@CamGTPThis issue on my old truck happened 2 years ago and I am not too car savy but from what I can remember the 6th cylinder crashed into the lower engine or crashed through to the floor of the engine? He said it would require an engine replacement.

 

Thanks to everyone who chimed in, its much appreciated