2010 Denali ticking noise

[Ghost10]

So it sounds like a stuck lifter maybe I’m wrong but let me upload a video
We just got the truck for $2000.00
It runs great

 

[swathdiver]

Message, "This video is private comes up".

 

[Ghost10]

Shit yeah let me see if I can fix

 

[Ghost10]

 

[Ghost10]

I also see I once again posted in the wrong section my bad

 

[B-train]

Yep, lifter. You can try som MMO or ATF on a fresh oil change and see if she frees up, otherwise you're in for the repair

 

[Ghost10]

Yep, lifter. You can try som MMO or ATF on a fresh oil change and see if she frees up, otherwise you're in for the repair

How many quarts of ATF ?

 

[B-train]

I've used both and usually substitute about 1 quart or so. Since yours holds 8 qts, you could probably get away with up to 2 quarts. I know that MMO states you can substitute up to 20% of engine oil with that. I'm currently using that on my daughter's 2008 Lucerne with a noisy lifter from previous owner lack of maintenance. It has so far quieted it up. It's a slower process as the varnish is cleaned off and oil can flow properly again.

I'd probably start with a fresh oil change and put in 6.5 qts oil, 1.5 qts ATF or MMO. Then let it idle and for awhile and see if the noise improves. If it quiets down, take her out for a Tennessee tune-up and run it a little harder to get the pressure up and heat up/circulate the good cleaning detergents.

If it doesn't quiet down from idling, a slower gradual drive may help. I've done it both ways.

Based on what I can hear on your video, I would assume its a collapsed lifer. A lifter that won't pump up is different than one that is jammed in the actuated position for AFM, or cocked sideways like I've seen on some YouTube videos.

 

[Trey Hardy]

How many quarts of ATF ?

I would use mmo over the atf but either or is good. I’ve used mmo for the 6th quart in each oil change for the past year since I last stuck a lifter and I haven’t had an issue since.
ATF would be good to help clean it out before an oil change but I drive every day with mmo in mine. Driving 4-6 hr twice a week align with Dailey driving

 

[iamdub]

So it sounds like a stuck lifter maybe I’m wrong but let me upload a video
We just got the truck for $2000.00
It runs great

Sounds like collapsed lifter or broken valve spring. Likely a lifter since you say it "runs great".

 

[Dustin Jackson]

Congratulations man that’s going to be a sweet ride when you fix it and what a deal!

 

[j91z28d1]

Sounds like collapsed lifter or broken valve spring. Likely a lifter since you say it "runs great".

would it be worth pulling a valve cover to check for a spring?

 

[iamdub]

would it be worth pulling a valve cover to check for a spring?

Absolutely. It's too simple a task not to. It'd suck to collect parts to replace lifters, take off work, etc. Then, 20 minutes into the job, you find a broken spring.

 

[Dustin Jackson]

Absolutely. It's too simple a task not to. It'd suck to collect parts to replace lifters, take off work, etc. Then, 20 minutes into the job, you find a broken spring.

I agree, diagnose the problem properly before formulating your "fix".

 

[iamdub]

I agree, diagnose the problem properly before formulating your "fix".

When my spring broke, it sounded like a collapsed lifter. But it had a pronounced miss. The smaller top broken half coiled down inside the larger bottom half so there was zero valve activity, making it a totally dead cylinder. There's a small chance his is broken in just such a way that it's allowing a little slack in the valve train. Or a push rod bent which, still, would allow slack.

 

[petethepug]

Another freebie to clean out the cylinder walls, pistons & valves is to run two tanks of e85. No change, no biggie. If it gets better, that’s all good too.

 

[Dustin Jackson]

@petethepug Does E85 really clean the engine as well as people claim?

 

[petethepug]

Not sure what the claims are, but it doesn’t contain all the good stuff known to cake in the combustion chambers and intake. In fact it actually removes it and provides a higher octane to prevent ping.

 

[donjetman]

E85 cleans well, but if you run e85 often I would plan your oil/filter change intervals more often.

 

[Dustin Jackson]

E85 cleans well, but if you run e85 often I would plan your oil/filter change intervals more often.

@donjetman Why is that?