2010 Denali ticking noise

[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?