Lifter Squeak!

[AmunRoo]

Hey Y'all!

So my Yukon developed a squeak along bank 2, possibly in the back two cylinders. If I had to describe it, i would say it sounds like birds. I'll attach a video i found on youtube of a guy who had the same issue on his camaro. for him it ended up being a bad lifter.

So the purpose here is to find out if anyone else has come across this issue and what was done about it. My Yukon has about 104K now. i've had it since 91K. The problem came on after a road trip from Chicago to NC and back. I'm planning on replacing All 16 lifters and pushrods if I can't find the cause to be something else. I'm planning on using high performance replacement parts. It seems like a little overkill but I do want to slap on a supercharger next spring.

Any and all help is greatly appreciated!

 

[AmunRoo]

ok, i couldn't find the camaro video anymore, but here is the same issue on a corvette

 

[Dustin Jackson]

@AmunRoo That is the sound of your roller lifter not rolling correctly on the cam, it can either have a flat spot or is turned sideways in the lifter tray.

 

[Geotrash]

Here’s another from my engine after a cheap lifter tray let a lifter twist in it’s bore just enough to scar the cam and chip the roller.

When you’re ready for the cam swap and start putting your parts list together, lots of people around here will help you out. I ended up with a cam motion stage 2 truck cam and I’m really happy with it.

 

[AmunRoo]

Here’s another from my engine after a cheap lifter tray let a lifter twist in it’s bore just enough to scar the cam and chip the roller.

When you’re ready for the cam swap and start putting your parts list together, lots of people around here will help you out. I ended up with a cam motion stage 2 truck cam and I’m really happy with it.

Can you tell me a little more about your cam swap? i'm still debating on whether i want to upgrade mine.

My plan is to tear down the top half and replace the lifters and pushrods. i'm not sure if i should replace the rockers. i will be upgrading the valve cover for sure and adding a catchcan. These are the parts i am planning to use, including a new radiator.

Texas Speed & Performance 5/16" Chromoly Pushrod Kit, Set of 16

Texas Speed & Performance 5/16" Chromoly Pushrod Kit, Set of 16

www.texas-speed.com

ZZP Hydraulic Roller Lifters - Set of 16 - LSx

These lifters are almost required for any 3800 car shifting above 6000rpm because they help with the typical 5600rpm dip.LS7 lifters are preloaded and have to be installed between 3/8 and 3/4 turn (vs. 1/2 to 1.5 turns on stock lifters).

zzperformance.com

https://www.alloyworksplus.com/products/3row-radiator-for-2000-13-chevy-silverado-cadillac-escalade-v8-48l-53l-6l-62l?variant=62626b49-54a7-4cc3-a46c-b3389bc81e7b&utm_source=google&utm_medium=cpc&utm_campaign=SSC-US-ChevyRadiator-Rawiella-20200702&utm_term=10454918338&utm_content=content&gclid=CjwKCAiA0KmPBhBqEiwAJqKK4wKQWdsKp7tr97pQJDvADL7rwBhvWrG9-dB5g6Hbb_4-m_rSJGucfhoCknsQAvD_BwE

I plan on supercharging the truck this coming spring!

 

[Geotrash]

Can you tell me a little more about your cam swap? i'm still debating on whether i want to upgrade mine.

My plan is to tear down the top half and replace the lifters and pushrods. i'm not sure if i should replace the rockers. i will be upgrading the valve cover for sure and adding a catchcan. These are the parts i am planning to use, including a new radiator.

Texas Speed & Performance 5/16" Chromoly Pushrod Kit, Set of 16

Texas Speed & Performance 5/16" Chromoly Pushrod Kit, Set of 16

www.texas-speed.com

ZZP Hydraulic Roller Lifters - Set of 16 - LSx

These lifters are almost required for any 3800 car shifting above 6000rpm because they help with the typical 5600rpm dip.LS7 lifters are preloaded and have to be installed between 3/8 and 3/4 turn (vs. 1/2 to 1.5 turns on stock lifters).

zzperformance.com

https://www.alloyworksplus.com/products/3row-radiator-for-2000-13-chevy-silverado-cadillac-escalade-v8-48l-53l-6l-62l?variant=62626b49-54a7-4cc3-a46c-b3389bc81e7b&utm_source=google&utm_medium=cpc&utm_campaign=SSC-US-ChevyRadiator-Rawiella-20200702&utm_term=10454918338&utm_content=content&gclid=CjwKCAiA0KmPBhBqEiwAJqKK4wKQWdsKp7tr97pQJDvADL7rwBhvWrG9-dB5g6Hbb_4-m_rSJGucfhoCknsQAvD_BwE

I plan on supercharging the truck this coming spring!

Sure. Here’s the whole setup. I’ll spare you the saga and just linked to the final setup I’m happy with.

Post in thread '2012 Yukon XL Denali 6.2L Cam Swap Thread'
https://www.tahoeyukonforum.com/thr...nali-6-2l-cam-swap-thread.121671/post-1616690

If you’re gonna supercharge, @Foggy can give you some pointers. Short version: you’ll want a cam designed specifically for the 5.3 with a blower. Also, 3-row radiators are reportedly less efficient than 2-rows. And you’ll wanna upgrade that transmission cooler and move it below the bumper or you‘ll be fighting temps if you’re gonna do any towing.

Also - factory rockers are stout, no need to replace unless you’re gonna play around with valve geometry. Back in the LS1 days GM had a problem with the needle bearings falling out of some of them and ending up in the oil pan. A whole cottage industry of trunnion upgrades sprouted and has been alive and well ever since. Don’t know of a single case of a trunnion failure on a Gen IV engine.

 

[Dustin Jackson]

@AmunRoo unless you see any red flags with your rocker arms I would reuse them, same with pushrods. The main parts that are being damaged here are the lifters and the cam.

Lifters, lister trays, and cam is the base of what’s needs to be replaced. Everything else is icing on the cake unless you going with AFM delete then the list gets a little longer.

 

[AmunRoo]

My truck actually does not have AFM, which is a load off my shoulders. I believe it o ky has the VVT.
I'm debating on whether I want a stage 1 or stage 2 cam at this point. I want a solid daily driver and I don't really want a choppy idle. I do plan on re-ising the stock rockers, as long as they're still good to go. I definitely am changing the push rods and lifters on both banks. You mentioned getting a 5.3 cam. Does it matter that I have the L92? I actually like the cam motion stage 2 cam specs. Especially that you still get a tame idle. Was also considering doing headers while the heads are out too.

I appreciate the responses. Thanks.

 

[Geotrash]

My truck actually does not have AFM, which is a load off my shoulders. I believe it o ky has the VVT.
I'm debating on whether I want a stage 1 or stage 2 cam at this point. I want a solid daily driver and I don't really want a choppy idle. I do plan on re-ising the stock rockers, as long as they're still good to go. I definitely am changing the push rods and lifters on both banks. You mentioned getting a 5.3 cam. Does it matter that I have the L92? I actually like the cam motion stage 2 cam specs. Especially that you still get a tame idle. Was also considering doing headers while the heads are out too.

I appreciate the responses. Thanks.

Definitely want to go with a cam designed for the 6.2, for sure. I'm really happy with the Cam Motion stage 2 cam, and see no downsides with it. Smooth idle and great performance.