How to reduce the dreaded valve carbon?

[AlsMaverick]

If you dont know; you just dont know. So I can assist with the learning:





He explains it very well. Mavericks have not been around long. But the Direct Injection 2.0L has been and the issues are real.

He said it's CONDENSATING. The word is condensing.

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[JimKivi]

I have the Golf SE with the automatic ( in case , God forbid, the wife had to drive it but now my son started driving) . My other car is a manual- a 2005 Infiniti g35 sport coupe I bought new that has 33,000 miles on it currently. I rarely drive the g35 but I've been lately and have been thinking it's a dying breed- naturally aspirated engine, manual transmission, red.....- it's a lot more fun to drive. I was going to use some of the proceeds from the same towards a Maverick down payment and give my son the VW next year when he's a senior.

No intent to be rude here, but to some of us this is an important topic, so please start another thread for off topic issues. Thanks.

 

[Gonzo chris]

No intent to be rude here, but to some of us this is an important topic, so please start another thread for of topic issues. Thanks.

You're welcome

 

[shrek]

I had a 2016 VW 1.8T - I spent hours reading about all the horror stories of Audi/VW issues. Kept it 70k + miles, not a single issue and my average mpg exceeded the hwy mpg. Gasser, not TDI. Rated 25/35 and lifetime avg was 38 mpg.

Again, how many engines percentage-wise, does this truly affect?

Truely affect? Well I for one think it happening to my 2.0L Edge was 1 too many; and enough for me to wise up. But hey; again yur 2.5L NON BOOSTED Hybrid will prolly not be affected as bad. And I truly hope not. Cuz the hybrids have more than enough problems as it is.

BOOST (equals) Blow By past the rings; every boosted car ever produced has that. Much Higher pressure in the cylinders; more blow by on the rings than a Normally Aspirated 2.5L. Meaning MORE volume of air that needs to be purged from the crankcase along with more OIL vapor tagging along for the ride. I dont know of any other way of dumbing it down.


Could it be that I push my lil 2.0L ? Yup. I do. I am one of those dudes that will pass you on the right cuz yur poking along in the left. Never will deny it. so do I use the turbo more? Oh Definitely!

As the old saying goes; screw me once shame on you (oil caked valves). Screw me twice......... Well it wont happen; so I dont need to finish the saying.

You do you, Ill do me.

 

[Deleted member 30736]

DI coking is like space aliens or Sasquatch. You either believe in it or you don't.

My point here was that one can find different opinions on the subject, not to present those who believe it to be a problem as Chicken Littles. I run dual catch cans in my truck and believe it will prevent problems down the road. I've cleaned enough carbon from cylinder heads over the years to believe.

 

[LC48]

Interesting info.

But I read the 2.0 EB engine has a “cup” like PVC drain feature already built into it. Supposing where the PVC system starts, at engine vent port, there’s a baffle system that diverts any oil from suction/vacuum, returns it to the crankcase.

Curious. Anybody aware of that?

Solid question, thanks!

There are baffles both at the valve cover vent and on the block crankcase vents that certainly help a good deal, but they don't prevent. I dump oil and condensate out of each can on a regular basis. This is just as normal a routine as fuel contamination in a DI engines oil - I sample at every change, and occasionally at mid-point, fuel dilution shows in every report.

Again, how many engines percentage-wise, does this truly affect?

Do you have any evidence showing anything less than 100% of DI engines are truly affected? Percentage-wise......

Oil vapor over the back of hot valves with no fuel/air mix across to help keep them clean, they will coke, at least here on earth - physics varies on other planets........

 

[surfstar]

Truely affect? Well I for one think it happening to my 2.0L Edge was 1 too many; and enough for me to wise up. But hey; again yur 2.5L NON BOOSTED Hybrid will prolly not be affected as bad. And I truly hope not. Cuz the hybrids have more than enough problems as it is.

BOOST (equals) Blow By past the rings; every boosted car ever produced has that. Much Higher pressure in the cylinders; more blow by on the rings than a Normally Aspirated 2.5L. Meaning MORE volume of air that needs to be purged from the crankcase along with more OIL vapor tagging along for the ride. I dont know of any other way of dumbing it down.


Could it be that I push my lil 2.0L ? Yup. I do. I am one of those dudes that will pass you on the right cuz yur poking along in the left. Never will deny it. so do I use the turbo more? Oh Definitely!

As the old saying goes; screw me once shame on you (oil caked valves). Screw me twice......... Well it wont happen; so I dont need to finish the saying.

You do you, Ill do me.

Well driving hard is actually one of the preventative techniques, so you could be 100% fine with no modifications.
Over the years I've come to find so much handwringing on car forums, that I just would prefer to see more hard proof. Call me "o ye of little faith"

GW would agree with your sentiment


(hybrid has port injection, so we have one thing to not worry about, luckily)

 

[Gonzo chris]

Truely affect? Well I for one think it happening to my 2.0L Edge was 1 too many; and enough for me to wise up. But hey; again yur 2.5L NON BOOSTED Hybrid will prolly not be affected as bad. And I truly hope not. Cuz the hybrids have more than enough problems as it is.

BOOST (equals) Blow By past the rings; every boosted car ever produced has that. Much Higher pressure in the cylinders; more blow by on the rings than a Normally Aspirated 2.5L. Meaning MORE volume of air that needs to be purged from the crankcase along with more OIL vapor tagging along for the ride. I dont know of any other way of dumbing it down.


Could it be that I push my lil 2.0L ? Yup. I do. I am one of those dudes that will pass you on the right cuz yur poking along in the left. Never will deny it. so do I use the turbo more? Oh Definitely!

As the old saying goes; screw me once shame on you (oil caked valves). Screw me twice......... Well it wont happen; so I dont need to finish the saying.

You do you, Ill do me.

Solid question, thanks!

There are baffles both at the valve cover vent and on the block crankcase vents that certainly help a good deal, but they don't prevent. I dump oil and condensate out of each can on a regular basis. This is just as normal a routine as fuel contamination in a DI engines oil - I sample at every change, and occasionally at mid-point, fuel dilution shows in every report.



Do you have any evidence showing anything less than 100% of DI engines are truly affected? Percentage-wise......

Oil vapor over the back of hot valves with no fuel/air mix across to help keep them clean, they will coke, at least here on earth - physics varies on other planets........

I'm a little, not a lot, curious if other brands with DI have less issues with it

 

[shrek]

Well driving hard is actually one of the preventative techniques, so you could be 100% fine with no modifications.
Over the years I've come to find so much handwringing on car forums, that I just would prefer to see more hard proof. Call me "o ye of little faith"

GW would agree with your sentiment


(hybrid has port injection, so we have one thing to not worry about, luckily)

Exactly! I get it. But since I have experienced it first hand, I'm gonna try to prevent it in the puppy truck. May not do anything, but when it's all said and done, if it does it to me all I can say is I did everything I could to prevent it. I really do think boosted direct injection causes it. Could be just a ford thing. All I own are Fords

 

[shrek]

I'm a little, not a lot, curious if other brands with DI have less issues with it

Since all I own are all fomoco products, I can't say. I have the same questions. Just my 2.0 Edge Definitely had an issue. Hope to prevent it in my Maverick. But I promise you this, I'll be checking the valves around 50k before factory warranty expires. I'm not gonna pay for it outta my pocket. But with the catch cans I am not anticipating an issue again. Maybe a Lil preventative from this might be in my future as well:

CRC GDI IVD Intake Valve & Turbo Cleaner https://a.co/d/b873uaY

 

[surfstar]

Exactly! I get it. But since I have experienced it first hand, I'm gonna try to prevent it in the puppy truck. May not do anything, but when it's all said and done, if it does it to me all I can say is I did everything I could to prevent it. I really do think boosted direct injection causes it. Could be just a ford thing. All I own are Fords

If I planned on owning an EB long-term, I'd probably lean your direction too (and would try to be the one providing data for others - valve pics every 30k miles, if a cheap endoscope would work, etc)

It will be interested to see long-term 2.0 vs 2.5 issues! (although I'd prefer we have none!)

 

[LC48]

I'm a little, not a lot, curious if other brands with DI have less issues with it

I would say the amount of coking would logically vary between makes, too many variables in design, manufacturing, etc., for it not too.

Variance as to how well a given make handles coking would be largely dependent on how well the modules deal with detonation - these small boosted higher hp engines run pretty close to detonation most of the time when new anyway, so not too far to go...

The other variable is how well a given owner/driver will detect the attendant performance degradation due to coking over time.

 

[shrek]

I would say the amount of coking would logically vary between makes, too many variables in design, manufacturing, etc., for it not too.

Variance as to how well a given make handles coking would be largely dependent on how well the modules deal with detonation - these small boosted higher hp engines run pretty close to detonation most of the time when new anyway, so not too far to go...

The other variable is how well a given owner/driver will detect the attendant performance degradation due to coking over time.

That is correct.... I don't drive wifemates Edge often. That's how I noticed something was off when it was running a Lil rough. Had I drove it daily I prolly would not have noticed it as soon. As I did.

I will say this, the Lil 2.0L is a peppy Lil bugger when the valves are not all covered in that crap!

 

[Gonzo chris]

I would say the amount of coking would logically vary between makes, too many variables in design, manufacturing, etc., for it not too.

Variance as to how well a given make handles coking would be largely dependent on how well the modules deal with detonation - these small boosted higher hp engines run pretty close to detonation most of the time when new anyway, so not too far to go...

The other variable is how well a given owner/driver will detect the attendant performance degradation due to coking over time.

Ya I looked it up apparently the VW 1.8t 3rd generation apparently eliminated the issue for the most part so must me a design thing

 

[MiMav]

https://www.uprproducts.com/ford-gm-baffled-billet-one-way-valve-cover-crankcase-breather-kit-upr/

Thank you for the link and for your thoughts on the issue. I think it's great that people post information like this. I hope some of the responses won't discourage you or others from creating similar posts.

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