Posted on 03/29/2024 5:16:06 AM PDT by TermLimits4All
I have a 2019 Chevy Silverado with 103k miles on it. I'm just starting to notice ticking when accelerating or just revving the engine while parked. I know the silverado has a lifter issue with the AFM (Active Fuel Management) system so I'm getting concerned. I plan on ordering a stage 1 cam and lifter kit with a delete for the AFM to have installed.
My main concern is that I have to travel 2-21/2 hours each way daily, mostly highway but do not want to blow the engine of course. Then is goes from a 6k job to over 10k. Am I safe for a bit if it's just a dull tick for a little bit until the cam and other stuff arrives from Texas Speed?
I've never had an engine issue on one of my vehicles before, I have no check engine lights and my oil pressure is fine according to the guage on my dash.
Any mechanics out there have some insight? should I rent a car or is it safe to drive for a few days if it's a dull tick at this point?
maybe bad ignition timing?
You have worn cam lobes on a truck with only 100k miles? What is this, the 1980s? I thought everyone was using roller lifters/followers!
I don’t know much about the silverado, but since you are calling them lifters, I am guessing this isn’t an over head cam engine. So if you have an overhead valve engine, you are going to strip the engine down to the timing chain. Or did you mean followers?
Either way, I don’t understand why you would need a new cam shaft already
What engine does it have?
Sounds similar to my 2014 Silverado, at about 40k miles the intake manifold bolts were breaking causing air leaks that sounded like ticking. Was worse when it was cold. I took it to my local mechanic who replaced the bolts and it’s been fine ever since. Back then he said it was a known issue by GM so not sure if they fixed it or not, just thought I would chime in, in case it might help.
I would do it as soon as you can but I’ve heard one that sounded like the A/C compressor was eating itself from >100’ away. I went over and the guy said it was just the lifters and he was fixing to get around to getting it repaired.
I know the earlier model LS engines were prone to the exhaust manifold bolts breaking which gives tick sound. There are kits from Dorman to repair it.
Having a little engine noise, and planning major engine work deviating from OEM specs to solve it?
One would suggest that you reconsider.
Take it to a reputable independent GM/Chevrolet engine mechanic for a look. He ought to be able to give you practical professional advice.
What brand oil and weight are you using and how often are you changing it?
Rent a Hertz EV until you get the work completed.
Just don’t park the rental in your garage overnight.
The AFM system is a POS. Well known for having issues.
If it’s the 5.2 or 6.1, lifter failure is a kmown issue.
The AFM/DFM - which I turned off on my 6.2 - has nothing to do with it.
Did you check out any of the CHEVY forums or Google/YouTube? You might not find the complete answer but like some of the comments here, it may give you other things to check before you tear the top off your engine.
My plan is the different cam and lifters with the delete kit. according to my mechanic he said the new lifters, pushrods etc will eliminate the problem. I hope he’s right, my previous vehicles i’ve never had this issue. The 5.3 apparently has the issue but it’s interesting that mine pops up after 100k miles, well outside warranty. My experience is better than other friends that have the same style silverado.
Hadn’t thought of that but the vehicle isn’t running rough, I just now hear the ticking noises. I changed out my plugs and wires along with the coil packs a few months ago too.
Changing the lifters and cam should do the trick, lol.
Just don’t use the same shitty OEM lifters - those are what cause the issue.
DFM/AFM is not the.cause, though use a 3rd party device to turn off the DFM (because it sucks) and increase throttle response.
You probably won’t need that since you’re retuning everything anyway.
Newer Rislone you add to crankcase and just drive the car normal. A couple hundred miles, then change out.
“I know the silverado has a lifter issue with the AFM (Active Fuel Management) system so I’m getting concerned”
I wouldn’t obsess over that if I were you....it’s not that ‘till it is.
Having it diagnosed by a trusted shop would be my 1st move......in the mean time, if your that concerned it might meltdown, by all means find an alternative mode of transportation.
When I had the transmission rebuilt on my 2015… I had the AFM turned off (HP Tuners). Because the AFM lifters were still in the motor…one finally collapsed and bent a pushrod.
Ended up having a new cam and lifters (non AFM) installed and the mechanic did a full internal AFM delete. Cost me less than $3,000.
If you drive it in M4 instead of auto it will disable the afm which is what I would do. Also when you do the cxam swap you’ll have to program the afm out of it. You can buy the programmer now and disable it that way for now.
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