The car has 42,000 miles on it. Been tuned since 4,000 miles. I Have seafomed it 3 times, once at 25k miles, once at 36k miles and just did it 2k miles ago cause I had a extra can in the garage. I have been running meth for the last 3-4k miles along with a 50/50 E tune. "E85 wont help your intake valves"

I had some extra time the other day and have seen all the threads on these 08 cars with 40k miles with all the carbon build up so i pulled my intake off. I found this even after all of the chemicals that run through it. Ive ran 4 and a half gallons of Meth through the car so i thought there would be no issues.... This isnt as bad as others but still a issue for a 40k mile car that is cleaned daily with meth and was just seafomed.... While I had the intake off i cleaned up the ports with a dremel slightly and painted it to match the car lol I was bored. Heres some pics.

 

What kind of oil just curious ?

 

I wonder if an EGR delete would help with this??

 

Should call up Shell and Chevron and tell them their **** doesn't work as advertised lmao

 

Usually Mobile one oil, I change it when the display reads 50% typically. I run shell Vpower 93 when i run a gas tune and kroger E85/93 when on the mix tune. The EGR solenoid has a cap on it and the Line was removed. Cracked it a long time ago so i just threw it out lol. Helped smooth out idle fuel trims and random trim spikes while cruizing. Im going to make a catch can and see what the results are and how muchi get out of it. I run my car hard, racing every weekend, tuning for different mixes, tuning for intake changes, testing cam tables, I use it as a test dummy so it shouldnt have a issue with carbon build up lol.

 

Ugh, not another one . On our local forums another TC owner is experiencing the same symptoms I was and it's getting progressively worse so likely the same thing again.

 

i seafoam every oil change

 

I have 37k miles and haven't done it once, I've been too afraid to mess something up, like pulling the wrong hose to ingest the Seafoam... I'm almost afraid to think of what my valves look like.

 

just bought a meth kit, my car only had 5k on the new engine now though, hpefully it will help. ***** scary lol.

 

yup i had dirty valves at 16k miles! meth will help just a gallon of straight windshield fluid and a little meth. itll help clean just takes time but seafoam is helpful as well.

 

We'd have to have an egr first before can can delete it.

 

If he was referring to the black box on the front of the intake manifold as the"egr" then yes I deleted that. There is a oil passage coming through the center of the manifold that purges into the two center cylinders from what it looks like. I don't know what it actually does, maybe another blow by port. Anyone notice this?

 

the flat part of the valve doesnt look too bad

 

Yeah, those don't look that bad at all for DI. I'd say the meth and seafoam are helping to keep the build-up off the valve heads themselves. The stems look like a little is caked on but it's not too too bad.

I might do the same thing to my EGR but I was unsure of the issues that could arise. I'm not too familiar with blocking those off. But if you say it helps with the fuel trims and whatnot, then I'm in lol.

 

what will help is not running your PCV through the intake. thats where most of that oil build up comes from.

 

Catch can or VTA? I'd say catch can...

 

probably a catch can would be the most pcm friendly option. but alot of people with v-dub turbo cars vent them out the exhaust.

you gotta be careful though, if the pcv is set up like the ss/sc theres a small breather in the intake manifold leading up through the valve cover that will suck in unmetered air if the pcv is vta. it can be compensated for in the tune though.

 

LOL x2... that's mostly what the VVT is for

 

36,000 miles. Seaform every 10,000 miles. running meth for last 1000 miles. Just pulled my intake

 

Wow that is gummed up.

 

i only took 2 pictures for some reason. But they all looked the same

 

lol so seafoam is snake oil ^_^