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Random tapping/clicking from engine at idle.

22RAMAlazan said:
Thank you for this information! Do you know if something like this would be covered uner powertrain or the regular warranty? I am already at 50,000 so I am out of the basic 3/36.
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Not sure on that front. One of these days I am going to try those steps myself and see if it goes away.
 
What I don't get with them saying ya just need to put in this magic unicorn pee & fairy dust in your oil and all will be well, but why is this problem showing up on low mile engines mine started around 10K?
 
Everyone said my video was normal noise. For some reason the dealer feels the need to pull the cam and lifters out to verify. haha If it sounds bad. Its probably bad
 
Wheelz said:
If you're worried...drain a little of the oil and see if you have "glitter" in it. But yeah..take it in under warranty. If you've done all the service yourself, be sure to have all your receipts together cause they will fight you on it. Heck..get an oil analysis and show it to them if the analysis finds significant wear...Good luck
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Lifter wont really give glitter, at least mine didn't
 
Yeah..the lifters won't, but the cam lobes will. The lifter hangs up in the shaft and the cam lobe just flattens out.
 
If it was run like that long enough it probably would. I caught mine pretty quick and had it changed a few weeks later
 
Ok, maybe I'm biased cause I just want this to be true in the case of my truck, but that ticking sound seems to be best explained by the AC compressor vs the hyd lifters. That said:

How can you have a random ticky-tick (aka typewriter tick) that comes and goes and nearly random times AND most importantly doesn't have a rhythm or increase / decrease with RPM?

Now, I have read many a post here or FB where people claim they have this typewriter tick and take it in and bam, it's cam and lifters time. Thing is, if we applied scientific experiment principles to this, that proves nothing. Causation / correlation / coincidence has not be isolated. Some people have even reported the sound comes right back after the dealer re-installs new hyd cam and lifters.

There's a third party industry that benefits from the fear this is lifter failure, and that clouds the judgement and motives here as well. Hamilton flat tappets anyone? I'm sure they're great, but do you REALLY need them, or just think you do?

I have seen videos out there where the lifters are truly shot and it does NOT sound like a random typewriter sound.
 
BlueOx2500 said:
Ok, maybe I'm biased cause I just want this to be true in the case of my truck, but that ticking sound seems to be best explained by the AC compressor vs the hyd lifters. That said:

How can you have a random ticky-tick (aka typewriter tick) that comes and goes and nearly random times AND most importantly doesn't have a rhythm or increase / decrease with RPM?

Now, I have read many a post here or FB where people claim they have this typewriter tick and take it in and bam, it's cam and lifters time. Thing is, if we applied scientific experiment principles to this, that proves nothing. Causation / correlation / coincidence has not be isolated. Some people have even reported the sound comes right back after the dealer re-installs new hyd cam and lifters.

There's a third party industry that benefits from the fear this is lifter failure, and that clouds the judgement and motives here as well. Hamilton flat tappets anyone? I'm sure they're great, but do you REALLY need them, or just think you do?

I have seen videos out there where the lifters are truly shot and it does NOT sound like a random typewriter sound.
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Agreed. And I’ve read many o’comments where folks have had lifers, pushrods and cam swapped out when they bring their truck in for a tick and the noise came right back. Not saying there are zero trucks with lifter type issues, but you gotta wonder how many engines have been worked on without any actual problems other than a ticking noise.
 
I saw an interesting video today regarding the issues the GMC 6.2 liter motors are having. Apparently these motors are not having failures in other countries where the GMC/Chevy vehicles are sold with the 6.2.

The reason they gave was that those countries do not have the EPA requirements we do and the oil being used is a heavier weight oil in the same 6.2 motors.
 
heck..at that point, would've been an excellent time to do head studs and a coolant bypass at that disassembly point.
 
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