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2014 6.2 bit the dust

bdbake01

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MN6.2 Enthusiast

MN6.2

Posted
Posted

It never caused me issues either but a few reason I can think of. I've read a few issues with the collapsible lifters failing. Also, if your digging into the motor to upgrade the parts, might as well go to an upgraded camshaft and most of the popular MFG's cams are DOD delete. But shoot my truck made it over 100,00 with it enabled so who really knows. To each their own. 

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MN6.2 Enthusiast

MN6.2

Posted
Posted
33 minutes ago, amxguy1970 said:

So if I have 120k and DoD I am safe? What if I push it to 135k and have DoD will my motor fail in spectacular fashion? Why wouldn't they just upgrade if it fails (which it most likely won't)?

There isn't, just another DoD hater because they hear a few other random people having an issue... They see 15 posts about a failure on forum of a truck that has built millions of these and want to make a mountain out of a mole hill on a less than a tenth of a percent failure rate?

 

Tylery

My bad. Didn't mean to make it look like I was blaming the failure on DOD and I'm not really a hater, just a personal preference type of thing I guess. Shouldn't have mentioned it. 

L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

Is it wise to have a hollow valve stem? Seems like of counter-intuitive strength and bending wise, but does make sense for reducing mass of moving parts. Is that common? 

mookdoc6 Senior Enthusiast

mookdoc6

Posted
Posted
1 hour ago, L86 All Terrain said:

Is it wise to have a hollow valve stem? Seems like of counter-intuitive strength and bending wise, but does make sense for reducing mass of moving parts. Is that common? 

Only from a Deflection stand point but even then Very slightly!  In this configuration HOLLOW is absolutely the way to go for strength and total mass.

RE1 Enthusiast

RE1

Posted
Posted

Might be worth politely asking if GM will provide some assistance. You are 14k miles over the powertrain warranty and yes, you have a transmission tune, but it’s worth asking regardless. 
 

All they can do is say no. 

bdbake01 Senior Enthusiast

bdbake01

Posted
  • Author
Posted
1 hour ago, Snowcamo said:

Isnt that where oil comes from to lubricate the rocker tip/ roller?

Sent from my LG-G710 using Tapatalk
 

That’s the pushrod.  

bdbake01 Senior Enthusiast

bdbake01

Posted
  • Author
Posted
38 minutes ago, RE1 said:

Might be worth politely asking if GM will provide some assistance. You are 14k miles over the powertrain warranty and yes, you have a transmission tune, but it’s worth asking regardless. 
 

All they can do is say no. 

I did, they said no. I really didn’t go full on Karen or anything, but.  Offered a “good deal” on a ‘19.  Wasn’t being an a$$, dealer was just trying to help out as best he could in his area of control.  

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted
That’s the pushrod.  
Heck ya. Skimming through while at work... Less weight at the valve equals less stress on the spring.

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JONBLARC7 Enthusiast

JONBLARC7

Posted
Posted

DOD delete is important because you remove the head and replace those crap AMF lifters with LS7 lifters.

 

I had a broken spring on number 5 exhaust valve I believe at 120K miles on my 2014 L86.  But got very luck and it didn't drop the valve.  I think it was 5 dollars for the updated spring from GM and 35 for the spring compression tool from Texas Speed and I was back on the road.

 

THEN

 

A month later I pulled out of a parking lot a lifter on number 7 stuck.  I drove it back to the house about a mile away sounding like shit.  Then it made a bang and all the lights went away and it started running fine.  I guess the stuck lifter released.  But now I had a tick.

 

So I pulled it in the garage and did DOD delete and TSP 218/226

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted
DOD delete is important because you remove the head and replace those crap AMF lifters with LS7 lifters.
 
I had a broken spring on number 5 exhaust valve I believe at 120K miles on my 2014 L86.  But got very luck and it didn't drop the valve.  I think it was 5 dollars for the updated spring from GM and 35 for the spring compression tool from Texas Speed and I was back on the road.
 
THEN
 
A month later I pulled out of a parking lot a lifter on number 7 stuck.  I drove it back to the house about a mile away sounding like shit.  Then it made a bang and all the lights went away and it started running fine.  I guess the stuck lifter released.  But now I had a tick.
 
So I pulled it in the garage and did DOD delete and TSP 218/226
How you liking the cam/ tune?

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g2full Enthusiast

g2full

Posted
Posted

I don't know. You don't see many motors that go through this crap that don't have the DOD/AFM. Mine ran like a top until I decided I wanted to see just how much I could keep it in 4 cylinder mode. Two weeks, trained my right foot to pretty much keep it in 4 cylinder mode as much as possible. Then boom, a lifter failed and took out a pushrod on it's way. But people claim to love it, people claim to hate it. I know once I got mine back out of the shop the first thing I did was contact BBP and got that tuned out. Didn't have the funds to pull and tear down the motor for the actual "DOD/AFM delete kit" but maybe one day. I can also tell you I used to claim that I couldn't feel the truck going in and out of 4 cylinder mode until it didn't.

 

To the OP - sucks. But now time to build a bigger/better motor.

2018GMC Senior Enthusiast

2018GMC

Posted
Posted

Was there a bad batch of springs?

 

I’ve seen info on this forum about keepers coming out and some bad head castings. 
 

Guess we know why 2016+ models only have 60k powertrain warranty. 
 

my 2018 just turned 10k miles. I’ll probably hit the 5 year mark before 60k miles. 

bdbake01 Senior Enthusiast

bdbake01

Posted
  • Author
Posted
18 minutes ago, g2full said:

 

To the OP - sucks. But now time to build a bigger/better motor.

Ya know, you may be right. I have a new long block coming tomorrow.  
 

At the very least, I’m gonna be suspicious of the factory springs. Hopefully it has the “upgraded” springs, but I have yet to find out what these are.  
 

Anyone have any recommendations?  I have HP Tuners, and I’m not half bad with it.  Engine will be on a stand for as long as I can keep the wife at bay while I drive her car LOL.  

2018GMC Senior Enthusiast

2018GMC

Posted
Posted

OP - that really sucks about your engine. Good news is you will have a better than new replacement in a truck that’s probably paid off. 

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