Excessive intake valve buildup

[Potty_Pants]

on the bmw forums... I haven't seen a botched job.

usually they take pictures before and after... and the jobs are performed by either trained techs or people who've done it dozens of times.

and yes I echo finding a good person to do it too. prob will be stupid rare to find anybody who works on our cars to perform this clean.
must work with a tech off the books.

ppp

 

[DRS]

This product is claimed, if used every 7.5-10k miles to prevent intake valve build up in DI engines. It is inserted in the intake as part of the cleaning. Who knows. Might want to check it out.

 

[Philth]

I believe 3M has something similar too.

3M 08963 Fuel System Tune-Up Kit
http://amzn.com/B003YJ47JO

 

[DRS]

3M normally makes good stuff too.

 

[path914]

I have yet to see a single chemical cleaning have any significant effect on the intake valves of DI engines. Having taken apart several DI intake manifolds for this type of cleaning over years, my experience is that it requires physical cleaning of the valves to have any worthwhile effect, whether by media blasting (walnut or otherwise) or elbow grease. Seafoam and other cleaners sucked into the intake can't touch the baked on deposits.

We have it easy with the Hyundai engines as the intake manifold is a piece of cake to take off and clean the valves. This shouldn't take more than an hour of actual labor to clean by hand, not counting the time waiting for your solvent of choice to soak.

My old MS6 took all day and had much more build up due to the pressure of the turbo pushing more oil through the PCV and EGR. And don't even get me started on the VAG or Bimmer engines...

 

[DRS]

Good advice. You have pictures of the intake removal. How do you rotate the crank so the valves are closed when cleaning each cylinder? I would think that takes as much time as anything.

 

[path914]

I don't have pics, but it is pretty straight forward as the IM is right on top of the engine. Remove all connected sensors and hoses, unbolt the IM, start cleaning... 30 min easy once you have done it before. My MS6 was 3 hours to remove with practice and had to be done every 15k mi

In order to rotate the valves, you simply turn the crank pulley. Typically a few valves will be closed together, so only a few rotations are necessary.

I use denatured alcohol as the solvent and a gun cleaning kit to physically brush and scrape off the oil residue. Once the gunk is cleaned off of the valves, I use my shop vac to suck out the remaining liquid and gunk together.

 

[jnc2000]

This should help a bit... you'll need a 22mm socket

http://www.genesisowners.com/hyundai-genesis-forum/showpost.php?p=110652&postcount=19

 

[path914]

Re: Excessiver intake valve buildup

Path914 -- you are correct. It's a simple procedure, just time consuming.

On the V6, its 30 min to get to the point you show, a couple hours of cleaning (mostly waiting for the solvent to soak) and 30 min to button it back up. If I start in the morning, I'm done by lunch time no problem.

YMMV of course and the V8 may be a bit more time consuming, but I would think that using the media blasting, you would be able to clean faster as you do not have to wait for the soaking process.

In comparison to other cars I have performed this on (MS6, MS3, BMWs, VWs), the Hyundai is far and away the easiest and fastest

 

[glennk]

BUMP

I'm from the 2015 Forum and have a V8 engine. How is everyone doing so far? Any feedback?

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[Gunkk]

I bought my port injected 4.6 specifically to avoid the oil burn (rings) and any risks of first year v8 GDI issues.

I am happy with my choice.

 

[MG8]

get intake mani all cleaned up and install a catch can.

 

[tvroom]

Ok guys....I'm doing this next week on my 2013 3.8 Sedan with just under 50k. One thing I believe is correct is "Fuel additive of any kind will not have any effect on the intake valves cleanliness as the injectors are directly into the combustion chamber and NOT port injected upstream of the intake valve. I will listen to anyone's input on the task. Thanks to all in advance!

 

[OUsig]

I bought my port injected 4.6 specifically to avoid the oil burn (rings) and any risks of first year v8 GDI issues.

I am happy with my choice.

My 2013 5.0 drives great after nearly 113,000 miles - with better features. I so far enjoy the GDI
I do use Seafoam through the intake every 10,000 miles
and the engine idles smooth as new

 

[Gunkk]

Ok guys....I'm doing this next week on my 2013 3.8 Sedan with just under 50k. One thing I believe is correct is "Fuel additive of any kind will not have any effect on the intake valves cleanliness as the injectors are directly into the combustion chamber and NOT port injected upstream of the intake valve. I will listen to anyone's input on the task. Thanks to all in advance!

There is some merit in using a fuel system cleaner (polyetheramine aka Techron), but yes you are correct: In a GDI car, a fuel system cleaner will clean the fuel system, not the valve train.

 

[adipocyte]

Once you get the valves and intake sorted out and clean whether by mechanical abrasion and/or chemical solvents.....
It sounds like a catch can is a very worthwhile addition for this engine.

It seems like GDI engines should come from the factory with a OEM oil separator from everything I have read.
I would even consider a 2 stage setup (2 cans in series) with mesh material inside to maximally extract oil from the oily blow by mist with these engines.

 

[tvroom]

I bought a catch can last week and will install it in next couple days.

 

[tvroom]

OK, Thank you to all that said they would be dirty....they were caked! On a couple the stem diameter was twice what it should be if they were cleaned. It took me 6 hours to complete the job, I did it by hand with screw driver and a toothbrush. Normal carb cleaner worked better than the Mopar cleaner and they are now in great shape. I also installed a catch can as I plan on keeping the car to 100k. and will pull the intakes off again at that time to verify if the can has a large effect. I know there is a lot of pro/con discussion out there but for $35 installed, the can was worth it to me. The car is much more smooth idle during cold starts, and my mileage seems to be increased by 1-2 miles per gallon. Thanks again for the input.

 

[Gunkk]

Wow that is pretty bad at 50k miles. Thank you for sharing the photos!

I agree a catch can is not a bad idea for those willing to do the maintenance (checking/draining as often as weekly in the winter if frequently driven cold on short trips, etc.).

 

[kw012]

In addition to the crudy intake valve backs, do run Techron, BG product fuel injector cleaner and the like in addition to top tier fuels.
The reason being is that the GDI injectors are very high pressure units and cost much more than port injectors..so take care of them!