F150 intake valve fix?

gmcleer · May 6, 2016

The 2017 3.5l ecoboosts are going to have a dual fuel system. That seems like a fix for intake valve build up. I wonder if GM will make any changes to the DI engines in the near future?

Chad2815 · May 6, 2016

Why not, they have dual overhead cams and twin turbos to make almost as much power as a 6.2.

Rayce08 · May 6, 2016

yes the 3.5 ecoboost make alot of power but i would expect that from a twin turbo motor ..... my problem with these motors is can you imagine the repair bill when these go out of warranty ?

i fully expect people buying used f150s in the future to shy away from these for the NA v8s , when out of warranty or with high miles these will be $$$$ to fix

20SierraL8T24 · May 6, 2016

With a 60k warranty, why should GM? I doubt it. Maybe something on the redesign but we're a couple years out still.

muddkatt · May 6, 2016

The 2017 3.5l ecoboosts are going to have a dual fuel system. That seems like a fix for intake valve build up. I wonder if GM will make any changes to the DI engines in the near future?

I read about the dual fuel injection system yesterday and thought that maybe the extra injector was to clean the valves. The article I read was not very informative, so it is just speculation on my part.

mestupmonkydude · May 6, 2016

I saw a video where a ford rep said the dual fuel system is used to combat the noise the direct injectors make at low rpm. So the basically they use the indirect injection system for low rpm and slow pace driving, but when things get going it will switch to direct. This seems very silly to me, I mean the injectors on my 5.3 make some noise at low rpm under light load mainly from a stop, but after that i wouldn't be able to tell a difference from the exhaust note.

Yeah it makes sense to have an indirect system to keep the intake valves clean, but in my opinion it seems like an extra complicated system that can break and need fixing. While just having the valves cleaned every 30-50k thousand miles would be a better option. Just ask BMW, Mercedes, or audi. as long as its in warranty it cost nothing to have the valves cleaned. Out of warranty $300-$500, drop in the bucket in my opinion.

DanY · May 6, 2016

I saw a video where a ford rep said the dual fuel system is used to combat the noise the direct injectors make at low rpm. So the basically they use the indirect injection system for low rpm and slow pace driving, but when things get going it will switch to direct. This seems very silly to me, I mean the injectors on my 5.3 make some noise at low rpm under light load mainly from a stop, but after that i wouldn't be able to tell a difference from the exhaust note.

Yeah it makes sense to have an indirect system to keep the intake valves clean, but in my opinion it seems like an extra complicated system that can break and need fixing. While just having the valves cleaned every 30-50k thousand miles would be a better option. Just ask BMW, Mercedes, or audi. as long as its in warranty it cost nothing to have the valves cleaned. Out of warranty $300-$500, drop in the bucket in my opinion.

With a turbo motor, you can't just do an valve cleaning by injecting the cleaner into the incoming air stream. The carbon comes off the valve stem, goes though the combustion chamber and then destroys the turbo. I think you have to pull the heads and beadblast the valve stems. I think that will cost more than $500.

thewhitestallion · May 6, 2016

I saw a video where a ford rep said the dual fuel system is used to combat the noise the direct injectors make at low rpm. So the basically they use the indirect injection system for low rpm and slow pace driving, but when things get going it will switch to direct. This seems very silly to me, I mean the injectors on my 5.3 make some noise at low rpm under light load mainly from a stop, but after that i wouldn't be able to tell a difference from the exhaust note.

Yeah it makes sense to have an indirect system to keep the intake valves clean, but in my opinion it seems like an extra complicated system that can break and need fixing. While just having the valves cleaned every 30-50k thousand miles would be a better option. Just ask BMW, Mercedes, or audi. as long as its in warranty it cost nothing to have the valves cleaned. Out of warranty $300-$500, drop in the bucket in my opinion.

The problem with using any kind of additives to clean the valves of any carbon build up is they have found that these chemicals are causing the turbos to go out shortly after. Ford says this is due to causing the ET to get too hot causing the turbos to get too hot and then they give out. Ford does not have a way to clean their valves short of a valve job.

There is a video on you tube where a ford tech explains this. He had a EB escape that he was working on, and he found that the carbon build up on the valve(s) was the culprit. After he spoke with ford they said replace the whole head.

mestupmonkydude · May 6, 2016

With a turbo motor, you can't just do an valve cleaning by injecting the cleaner into the incoming air stream. The carbon comes off the valve stem, goes though the combustion chamber and then destroys the turbo. I think you have to pull the heads and beadblast the valve stems. I think that will cost more than $500.

By having a multipoint fuel injection system IE injector in the intake manifold, that spray fuel upstream of the intake valve you will get a cleaning effect. This is why non direct injection engines don't have to have their valves cleaned. When i said having the valves cleaned I did mean by pulling the head and cleaning it. BMW techs are really good at doing this now, and it can be done really fast and doesn't cost much. I guess pulling the heads on a v6 might take a little more time effort vs a straight six.

The problem with using any kind of additives to clean the valves of any carbon build up is they have found that these chemicals are causing the turbos to go out shortly after. Ford says this is due to causing the ET to get too hot causing the turbos to get too hot and then they give out. Ford does not have a way to clean their valves short of a valve job.

There is a video on you tube where a ford tech explains this. He had a EB escape that he was working on, and he found that the carbon build up on the valve(s) was the culprit. After he spoke with ford they said replace the whole head.

I never said anything about using additives to clean the valves. The indirect fuel system will keep the valves cleaned on their own, this is their plan with the new engine. Ford doesn't have any approved cleaning process that doesn't void the warranty. If their replacing the heads instead of cleaning the valves then their loosing a ton a money.