February 20, 2019, 06:41:42 PM
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Author Topic: Are the intake valves nitride coated (controlling valve coking)  (Read 623 times)

Offline 6500rpm

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I see a lot of valve coking on DI engines at my job, I also mess with firearms and there's a trend toward nitride coated barrels due to it's properties. I was curious if the OEM intake valves on our GTDI engines are nitride coated by chance if anybody knows.
Just a conversation point, not like I'm going to pull the heads off my vehicle just to install treated valves if Ford hasn't provided some type of treatment, but it makes me wonder. Also, what's the most important oil spec to look at-flash point?
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Offline SHOdded

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #1 on: August 15, 2018, 08:50:07 PM »
No idea on the valves.  FoMoCoSHO can give input on the most important oil properties, hes really dug into that stuff.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline Macgyver

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #2 on: August 15, 2018, 09:29:47 PM »
They might be sodium filled but I doubt they are coated. I retired from a specialty alloy mill that made all types of valve steel. They didnt need coating per metallurgists. Lol

Offline FoMoCoSHO

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Offline geophb

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #4 on: August 16, 2018, 06:20:47 AM »
Would there be a benefit if they were? I mean cuz when I had my intake off, the port had just as much buildup as the valve...
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Offline Macgyver

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #5 on: August 16, 2018, 02:41:18 PM »
Says the Stem is Nitrided.

Offline ToMang07

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #6 on: August 16, 2018, 02:45:35 PM »
I know the valves (old and new) were both coated when I replaced on in my 02 F350. I imagine they would be in these cars.
~Tom~
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Offline SHOdded

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #7 on: August 16, 2018, 03:05:43 PM »
Mustang 2.3 EB
"The cylinder head now has sodium-filled valves. The sodium is contained in the hollow valve stem and transfers heat from the head of the valve to the stem for improved valve cooling."
http://thechronicleherald.ca/wheelsnews/1240182-beneath-the-shine-2015-ford-mustang

https://www.newcomen.com/wp-content/uploads/2012/12/Chapter-22-Starr.pdf

https://www.fordmuscle.com/tech-stories/ferrea-helps-explain-valve-flow-dynamics/
« Last Edit: August 16, 2018, 03:15:03 PM by SHOdded »
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If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline Vortech347

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #8 on: August 17, 2018, 02:41:33 PM »
Mustang 2.3 EB
"The cylinder head now has sodium-filled valves. The sodium is contained in the hollow valve stem and transfers heat from the head of the valve to the stem for improved valve cooling."
http://thechronicleherald.ca/wheelsnews/1240182-beneath-the-shine-2015-ford-mustang

https://www.newcomen.com/wp-content/uploads/2012/12/Chapter-22-Starr.pdf

https://www.fordmuscle.com/tech-stories/ferrea-helps-explain-valve-flow-dynamics/


Oh jeeze, Ford didn't learn from GM effing up the Z06 engines with those valves.  Hopefully they are more robust.
Matt H.
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Offline SHOdded

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Re: Are the intake valves nitride coated (controlling valve coking)
« Reply #9 on: August 17, 2018, 03:54:45 PM »
Nary a problem yet.  Possibly they let GM do the beta testing LOL.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

 

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