6.2 Lifter noise??

[Chuck Ross]

I’m getting a noise from my 6.2 Sierra that sounds like a bad lifter or ‘pre-ignition’

it’s more noticeable at highway speed.

is this a common problem with 6.2?
thanks in advance!

[JimCost2014]

27 minutes ago, Chuck Ross said:

I’m getting a noise from my 6.2 Sierra that sounds like a bad lifter or ‘pre-ignition’

it’s more noticeable at highway speed.

is this a common problem with 6.2?
thanks in advance!

Welcome to the site.

 

No, for normal.

What grade of fuel are you using? More noticeable on a grade, or makes no difference?

 

Any other info about the truck, miles, year, and so on helps with the guesses. 

 

 

[Chuck Ross]

I’m driving a 2018 Sierra, 6.2 with about 45,000 miles and running premium fuel since new.

more noticeable when i lean into the throttle as I pull onto the highway, under load too, when pulling my travel trailer and speed up a little.

it almost seems like the timing is off a bit, not much more I can tell you.

thanks.

 

[JimCost2014]

2 hours ago, Chuck Ross said:

I’m driving a 2018 Sierra, 6.2 with about 45,000 miles and running premium fuel since new.

more noticeable when i lean into the throttle as I pull onto the highway, under load too, when pulling my travel trailer and speed up a little.

it almost seems like the timing is off a bit, not much more I can tell you.

thanks.

 

Do you hear it in the cab by your left foot?

[Chuck Ross]

Hi Jim, yes it seems to be coming from drivers side, but it’s hard to tell if it’s at the foot level.

also, I replaced factory muffler with a magna-flow muffler so it has no flapper now, not sure if that makes a difference,

thanks Jim! Chat soon!

[JimCost2014]

10 minutes ago, Chuck Ross said:

Hi Jim, yes it seems to be coming from drivers side, but it’s hard to tell if it’s at the foot level.

also, I replaced factory muffler with a magna-flow muffler so it has no flapper now, not sure if that makes a difference,

thanks Jim! Chat soon!

Take a look at this post here on the site, I hear the same thing in the cab of mine, just have never taken it in.

 

Ticking/fluttering sound from driver's footwell - TSB #PIP5570