Afm problem

[Grumpy Bear]

1 hour ago, Jsdirt said:

 They just had more miles on them than the guys who never changed the oil, and used the cheapest stuff they could find. 

I am truly on borrowed time. 130,160 trouble free miles. Given the quoted statement here and your stated 135,000 maximum in an earlier post as your highest observed before a failure....tick tock, tick tock. 

 

I used Quaker State Ultimate Durability, same oil that failed in the wife's Terrain and some Mobil 1 for the first 30,252 miles (YIKES) then Red Line and AMSOIL since. 

 

Trans on Red Line D6 since 45,000 miles and rear end on Red Line 75/90 or AMSOIL 75/90 since 50,000.

 

Now dad always told me they run the best just before they BLOW. If that is true....any day now. Runs cool, smooth and silent as a church mouse fart. 

 

Honestly, we will see. Not mess 'n with ya. Getting nervous now.  

 

 

 

 

[Jsdirt]

Hopefully you set a new record, Marty. And hopefully I do too!

[Grumpy Bear]

11 hours ago, Jsdirt said:

Hopefully you set a new record, Marty. And hopefully I do too!

I do not disagree with you. Most things since NAFTA are junk, vehicles included. But todays junk is better than 1950's best. I have an affection for British motorcycles so speak from experience. And that as a reference I know that even junk will last a very long time IF and it is a BIG IF....you treat it for what is instead of what you wish is was. 

 

NAFTA was a sign post, not a cause. That could have gone any direction the manufactures wished it to. What they wished was 'largest profit margin possible'. Unlike the middle of the last century where 'best product possible' was the byline. 

 

I was looking through Peppers service records this morning and I see I made a note on 6/8/2017 that on 95F days and as a base line, that is in stock form, my running water temperature was 202-215 F at 55 mph and at that speed my oil temperatures ran 220 - 225 F and bumping the speed up to 70 mpg they climbed to 245-250 F.

 

At 30W at those temperatures is something in the neighborhood of 4 to 5 cSt.

It's well past the initiation temperature for oxidation. If fact past the continuous service limit of even a Group III.

The rate of oxidation is high by multiples. Like 30 X higher than 200 F

Varnish and gum are generated above 220 F and seal materials take a beating.

That at these temperatures in the pan, bearing temperatures are in the 310-330 F range. 

The best oils will have trouble continuously operated like this. And this was the factory plan????

 

I run a 170 F water stat which keeps my pan temperatures under 200 F and have since about 35,000 miles. Most days, even hot days I'm between 188 and 195 F and even in a tailwind when I would be more inclined to run faster I set the oil temp limit at 200-202 F. That keeps me under 70 mph. I don't drive like this simply for fuel economy. At these temps the viscosity is about 15 cSt or three times that of the factory design. Yes, everything runs just fine, VVT AFM etc. 

 

Oxidation is low. Bearing temps run closer to 270 F. Varnish and gum and at a minimum and it is WAY inside the limits of a PAO/POE oil. 

 

Question now is, did I do this soon enough and will it be enough...time will tell. 

 

[flyingfool]

On 10/13/2020 at 10:10 AM, MaverickZ71 said:

No disrespect, but this is folklore.  AFM kicking in depends on the computer's memory of the truck's usage and the current throttle position.  I agree that 4th gear would probably keep it out of AFM, but I can't tell you how many times I saw AFM kick in on 5th gear and light throttle on our '09 1500 with a 6-speed.  While people on here were telling me it was impossible.  The GM Service Mgr said "not impossible."  Then I got the Range.  Then I finally tuned out the AFM with a Hypertech.  

this is the K2 forum  not the '09 truck forum , your comparing a different computer sytem entirely. its not folklore its fact on my model year. i havent driven a newer T1 yet so i dont know what it does in 7th or 9th gear.

no dissrespect taken

Edited October 14, 2020 by flyingfool

[15 Z71]

On 10/13/2020 at 10:10 PM, Grumpy Bear said:

I am truly on borrowed time. 130,160 trouble free miles. Given the quoted statement here and your stated 135,000 maximum in an earlier post as your highest observed before a failure....tick tock, tick tock. 

 

I used Quaker State Ultimate Durability, same oil that failed in the wife's Terrain and some Mobil 1 for the first 30,252 miles (YIKES) then Red Line and AMSOIL since. 

 

Trans on Red Line D6 since 45,000 miles and rear end on Red Line 75/90 or AMSOIL 75/90 since 50,000.

 

Now dad always told me they run the best just before they BLOW. If that is true....any day now. Runs cool, smooth and silent as a church mouse fart. 

 

Honestly, we will see. Not mess 'n with ya. Getting nervous now.  

 

 

 

 

I would just drive it and stop worrying about it. If it happens it happens if it don't it don't. One thing I have learned is I quit getting in every time I drive worrying about the afm. I'm sure there are lots of these truck with more miles then that of people who have never heard of or been on this site to worry about afm. Half of the people driving these trucks probably dont even know what afm is. Lol

[Grumpy Bear]

2 hours ago, 15 Z71 said:

I would just drive it and stop worrying about it. If it happens it happens if it don't it don't. One thing I have learned is I quit getting in every time I drive worrying about the afm. I'm sure there are lots of these truck with more miles then that of people who have never heard of or been on this site to worry about afm. Half of the people driving these trucks probably dont even know what afm is. Lol

Thanks. Honestly? I don't worry about much at all. I just have a weird sense of humor.  To many times around the block, right? 

[15 Z71]

1 hour ago, Grumpy Bear said:

Thanks. Honestly? I don't worry about much at all. I just have a weird sense of humor.  To many times around the block, right? 

Lol I have been on this for about 5 years now and at one point between not having a catch can or AFM turned off I was scared to drive my truck. But I have had 5 years and 66,000 trouble free miles. I enjoy this site but I quit worrying about driving my truck every day. By the way my Sierra is bone stock.

[Grumpy Bear]

25 minutes ago, 15 Z71 said:

Lol I have been on this for about 5 years now and at one point between not having a catch can or AFM turned off I was scared to drive my truck. But I have had 5 years and 66,000 trouble free miles. I enjoy this site but I quit worrying about driving my truck every day. By the way my Sierra is bone stock.

The only thing I worry about anymore is that if I boast I have 130,000 trouble free miles it will drop dead in the road just to embarrass me. If I keep my mouth shut then it will go 500,000 without a whimper. There just like your kids, right? 

 

 

Edited October 15, 2020 by Grumpy Bear

[mookdoc6]

22 minutes ago, Grumpy Bear said:

The only thing I worry about anymore is that if I boast I have 130,000 trouble free miles it will drop dead in the road just to embarrass me. If I keep my mouth shut then it will go 500,000 without a whimper. There just like your kids, right? 

 

 

The only thing I worry about is not owning this junk GM K2 product longer than grumps.....I better get back to honing in on maintenance to make these last few 1,000's of miles..... 

[diyer2]

Just took our first road trip in our 19 CR-V, 1 k miles total. 4 adults, luggage and cooler for snacks. Dealt with high winds both directions. Rain and snow also.

 70 - 80  MPH. Still averaged 28 MPG with the wind. Pleased with the 4 banger turbo. 

[KARNUT]

I find it surprising that people especially older experienced automotive junkies like myself. Are ok with the dance of cylinder deactivation. I never bought a truck with extreme fuel mileage concerns. And consequently the cylinder deactivation dance doesn’t really net much fuel mileage considering at the cost of the extra equipment failure. Certainly in the 200-300K range these engines routinely run with little maintenance. You add the byproduct of direct injection to the mix. You can’t help wondering what the hell. The non Frankenstein engine would have no problem with DI. Adding both is a potential big problem. GM added a bigger pan and oil to the mix and recommended more frequent oil changes and special oil. The drooling I love this motor crowd saying we’ll just change the oil more often and everything will be peachy. So spending more money on oil changes to give GM a higher EPA number at the expense of longevity. And real world unnoticed HWY numbers at least in my testing. And others. I’m surprised so many people drink the Kool-aid. Pretty soon the 2014 redesigned are going to hit the 150 miles and up crowd. That’s when the whole Frankenstein extra parts are going to start changing their tune. The crying will start. The people claiming well that was a costly experience. Why didn’t I see that coming.


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[Jsdirt]

When Mook's truck leaves him for dead on the highway, will he come back here and tell us? 

 

 

 

In other news .... something built 1,000% stronger than GM EVER could. My PerformaBuilt Heavy Hauler with 5-pinion planets, The Beast sunshell, and Sonnax Smart Tech Drum just arrived late yesterday afternoon. Good for 500 ft. lbs.±, at the rear wheels! I'm at maybe 280 right now. Plenty of room to play.  Will be nice having a reliable truck again. Although I do still have the stock engine at 103k. Place your bets on when that will be next.

 

Of course I added a whopping 10 HP over stock with the Hypertech program, pipes, and cold air intake back when it had 2k miles on it. So far, the driveline has been failing piece by piece each year. Last year it was the differential ... has to be that extra 10 HP ... 

 

Edited October 15, 2020 by Jsdirt

[diyer2]

While I understand your point Karnut, I still like my 2012 a lot more than my 1993. 

[mookdoc6]

When Mook's truck leaves him for dead on the highway, will he come back here and tell us? 

 

I have reported on every "LITTLE", "MINOR" or "MAJOR" issue on my truck and have no intention of changing that tune?  I could have purchased any vehicle I wanted price point of little concern but I chose a lonely GM product 5.3L aka: Frankenstein engine on purpose?  I am truly an idiot...….

[Jsdirt]

Oh don't feel bad, Mookster - there's lots of idiots out there. I'm one of them!  If there weren't, GM wouldn't be in business.