2016 5.3L AFM, problems fixed?

WilliamBos · September 30, 2016

Say what, what evidence??? I am on my second 2014+ DI engine truck and have yet to see any oil consumption issues. The engine in the 2014+ trucks is a completely new design from the previous generation engines, not one part was transferred over into the new DI engines.

How many miles do you keep a truck for? 200,000+ is how long I keep mine for. The achilles heel of DI os carbon build up on intake valves.

The 6.0 is still IDI, a safer bet imho.

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Silverado Steve · September 30, 2016

How does AFM have anything to do with carbon buildup?

Edited September 30, 2016 by Silverado Steve

Thomcat · October 1, 2016

How does AFM have anything to do with carbon buildup?

AFM has nothing to do with carbon buildup and DI has nothing to do with oil consumption.

Point being that now that Chevy has addressed the oil burning problem in the AFM aluminum 5.3s, these newer engines now incorporate DI which by design has a track record of causing carbon deposits on valves. Perhaps GM's additional change to sodium filled valve stems will mitigate the problem - maybe not.

Point being that just as more frequent changes of oil in unmodified pre 1/2011 AFM engines, rather than relying upon the engine killing DIC, might reduce oil ring deposits and cause oil burning - the use of top tier gasoline with superior additive packs might help to reduce combustion buildup on the valves in new DI engines.

Silverado Steve · October 1, 2016

AFM has nothing to do with carbon buildup and DI has nothing to do with oil consumption.

Point being that now that Chevy has addressed the oil burning problem in the AFM aluminum 5.3s, these newer engines now incorporate DI which by design has a track record of causing carbon deposits on valves. Perhaps GM's additional change to sodium filled valve stems will mitigate the problem - maybe not.

Point being that just as more frequent changes of oil in unmodified pre 1/2011 AFM engines, rather than relying upon the engine killing DIC, might reduce oil ring deposits and cause oil burning - the use of top tier gasoline with superior additive packs might help to reduce combustion buildup on the valves in new DI engines.

I understand all of that. My reply was based on williambros response that Carbon build up was an issue on these engines, therefore opt to disable afm or get a 6.0. I don't think the op was asking about carbon buildup on GDI engines, rather if afm and oil consumption were mutually exclusive. I think it has been clearly proven that GM resolved the oil consumption issues with the redesign. Carbon buildup has nothing to do with the topic at hand.

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WilliamBos · October 4, 2016

I understand all of that. My reply was based on williambros response that Carbon build up was an issue on these engines, therefore opt to disable afm or get a 6.0. I don't think the op was asking about carbon buildup on GDI engines, rather if afm and oil consumption were mutually exclusive. I think it has been clearly proven that GM resolved the oil consumption issues with the redesign. Carbon buildup has nothing to do with the topic at hand.

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My point was for the miles I put on a truck I am not going to entertain the thought of oil use or having to get valves cleaned of carbon. A 2500 with a 6.0 solves the issue for me. My 04 5.3 never used a drop of oil, my current truck does not use any, not going to buy a truck with fuel saving gimmicks that may or may not work and cause issues over the long haul.

Silverado Steve · October 4, 2016

My point was for the miles I put on a truck I am not going to entertain the thought of oil use or having to get valves cleaned of carbon. A 2500 with a 6.0 solves the issue for me. My 04 5.3 never used a drop of oil, my current truck does not use any, not going to buy a truck with fuel saving gimmicks that may or may not work and cause issues over the long haul.

You might be SOL with all manufacturers gravitating to some sort of fuel savings. My 5.3 with afm has not used any oil, i sleep well at night using a can of CRC intake valve cleaner every oil change. The issurs presented are vastly overstated.

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WilliamBos · October 4, 2016

You might be SOL with all manufacturers gravitating to some sort of fuel savings. My 5.3 with afm has not used any oil, i sleep well at night using a can of CRC intake valve cleaner every oil change. The issurs presented are vastly overstated.

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I like what Ford is doing with the ecoboosts to help offset the 5.0 and no afm whatsoever. Toyota is not using it either. GM could easily follow suit with the 3.6 TT.

I will be watching the posts here, but am willing to sacrifice mpg to not have issues.

I agree that the OLM is a bigger enemy to the engine.

Does that CRC actually work?

Edited October 4, 2016 by WilliamBos

Thomcat · October 4, 2016

I like what Ford is doing with the ecoboosts to help offset the 5.0 and no afm whatsoever. Toyota is not using it either. GM could easily follow suit with the 3.6 TT.

.......

I agree.....GM will likely go this way with a 3.6l EcoTec twin scroll turbo or dual turbo engine with more alloy and composites in the chassis to reduce weight. Their current 2.0T dual scroll turbo engine with DI/VVT/high compression puts out 250 hp in the Malibu and 265 hp in the Caddy and Camaros at 26 mpg without using gimmicks like start/stop and AFM. Less hp than the 3.6l in my Camaro but just as quick having a better hp/weight ratio.GM touts these smaller,lighter engines as energy dense and even offers them as crate engines for dropping in custom cars. Engines are just as happy to run on regular as premium grades, but with some power loss.

WilliamBos · October 4, 2016

I like what Ford is doing with the ecoboosts to help offset the 5.0 and no afm whatsoever. Toyota is not using it either. GM could easily follow suit with the 3.6 TT.

.......

I agree.....GM will likely go this way with a 3.6l EcoTec twin scroll turbo or dual turbo engine with more alloy and composites in the chassis to reduce weight. Their current 2.0T dual scroll turbo engine with DI/VVT/high compression puts out 250 hp in the Malibu and 265 hp in the Caddy and Camaros at 26 mpg without using gimmicks like start/stop and AFM. Less hp than the 3.6l in my Camaro but just as quick having a better hp/weight ratio.GM touts these smaller,lighter engines as energy dense and even offers them as crate engines for dropping in custom cars. Engines are just as happy to run on regular as premium grades, but with some power loss.

After seeing that 3.6 Camaro only .5 second slower than the Hellcat, I'd love to see a dual turbo version or twin scroll in the 1500.

Silverado Steve · October 4, 2016

I haven't torn my valve covers off to see if the last batch of CRC did anything, but i havent felt any engine power loss or amy sludge with oil changes. I feel confident my truck os dojng fine. Another trick is to throw a can of seafoam into the crankcase with 150 miles until your next oil change and let that oil work its way through your block and intake valves. Ford is adding a port injector to each cylinder on the next 3.5 ecoboost to rinse off the valves which is a step in the right direction for GDI concerns. Again, there is no empirical evidence that the new ecotecs burn oil regularly or suffer from extreme valve coking. As it stands all of this bunk is merely personal conjecture. A range AFM disable tool, a catch can and a little preventive maintenance will alleviate your concers with these engines. Unfortunately for you GM is not going back to port injection and removal of AFM from here on out, in fact GM just invested in new AFM software for the next batch of trucks and SUVs. As you said, you might be restricted to a diesel or Toyota for your next ride. Ford is using start stop on the F150 on both turbo engines ans the 5.0 is on the hook too and the ford crowd hates it over on f150forums.com

I like what Ford is doing with the ecoboosts to help offset the 5.0 and no afm whatsoever. Toyota is not using it either. GM could easily follow suit with the 3.6 TT.

I will be watching the posts here, but am willing to sacrifice mpg to not have issues.

I agree that the OLM is a bigger enemy to the engine.

Does that CRC actually work?

WilliamBos · October 4, 2016

I haven't torn my valve covers off to see if the last batch of CRC did anything, but i havent felt any engine power loss or amy sludge with oil changes. I feel confident my truck os dojng fine. Another trick is to throw a can of seafoam into the crankcase with 150 miles until your next oil change and let that oil work its way through your block and intake valves. Ford is adding a port injector to each cylinder on the next 3.5 ecoboost to rinse off the valves which is a step in the right direction for GDI concerns. Again, there is no empirical evidence that the new ecotecs burn oil regularly or suffer from extreme valve coking. As it stands all of this bunk is merely personal conjecture. A range AFM disable tool, a catch can and a little preventive maintenance will alleviate your concers with these engines. Unfortunately for you GM is not going back to port injection and removal of AFM from here on out, in fact GM just invested in new AFM software for the next batch of trucks and SUVs. As you said, you might be restricted to a diesel or Toyota for your next ride. Ford is using stbart stop on the F150 on both turbo engines ans the 5.0 is on the hook too and the ford crowd hates it over on f150forums.com

Thankfully the 6.0 gas engine is still IDI and has no afm. Plus the HD trucks have some things I prefer over the 1500's.

A few less mpg will not bother me.

So aside from regular oil changes, which I do at a set mileage by ignoring the OLM, what else do you do on these DI afm engines?

Edited October 4, 2016 by WilliamBos

Silverado Steve · October 5, 2016

Nothing other than a can of CRC and a can of seafoam on the crank.

Thankfully the 6.0 gas engine is still IDI and has no afm. Plus the HD trucks have some things I prefer over the 1500's.

A few less mpg will not bother me.

So aside from regular oil changes, which I do at a set mileage by ignoring the OLM, what else do you do on these DI afm engines?

mookdoc6 · October 5, 2016

I haven't torn my valve covers off to see if the last batch of CRC did anything, but i havent felt any engine power loss or amy sludge with oil changes. I feel confident my truck os dojng fine. Another trick is to throw a can of seafoam into the crankcase with 150 miles until your next oil change and let that oil work its way through your block and intake valves. Ford is adding a port injector to each cylinder on the next 3.5 ecoboost to rinse off the valves which is a step in the right direction for GDI concerns. Again, there is no empirical evidence that the new ecotecs burn oil regularly or suffer from extreme valve coking. As it stands all of this bunk is merely personal conjecture. A range AFM disable tool, a catch can and a little preventive maintenance will alleviate your concers with these engines. Unfortunately for you GM is not going back to port injection and removal of AFM from here on out, in fact GM just invested in new AFM software for the next batch of trucks and SUVs. As you said, you might be restricted to a diesel or Toyota for your next ride. Ford is using start stop on the F150 on both turbo engines ans the 5.0 is on the hook too and the ford crowd hates it over on f150forums.com

Complete nonsense people! Do not "just throw a can of Seafoam cleaner in your crankcase" Wow.....I am not looking for a rebuttal either just don't do that people!

Silverado Steve · October 5, 2016

Why is that?

Complete nonsense people! Do not "just throw a can of Seafoam cleaner in your crankcase" Wow.....I am not looking for a rebuttal either just don't do that people!

mookdoc6 · October 5, 2016

Who advocates throwing a liquid bottle of Gumout in their Crankcase? Completely Retarded, Utter Nonsense! Wow-it smokes! Really? I don't even want to know what the thought process is for throwing a bottle of SEAFOAM into a gasoline vehicle engine........................