O.N.

So did GM solve common direct injection issues?

Like valves coated in oil and carbon build up from not being washed with fuel like regular injection.

O.N.

I guess they didn't solve the issue then....lol

Jimbo1367

That shouldn't be a problem UNTIL the warranty ends. Gotta love it when a plan comes together.

lol

O.N.

would be nice to know especially when the crate engine becomes available.

lowerthanyou00

iTrader: (8)

Just seafoam it hahaha

MIGHTYMOUSE

iTrader: (59)

just like most of these other engines a good catch can goes a long way.

kelobro

No problems on my 2012 Impala 3.6DI... yet.

Sssnake

Meth FTW!!! We've done it in a couple of DI engines with good results. A 275k mi GTI still running 20+ lbs of boost with solid pulls all the way to redline. It should help with valve buildup on the NA engines as well

Noah Burns

iTrader: (5)

meth?

ramairetransam

iTrader: (18)

water meth injection or just methanol . Whatever you want to use .

Noah Burns

iTrader: (5)

ahh, ok, that's what I suspected you meant but wanted to make sure.

kelobro

Read about installing a catch can to get the oil out of the air flow from the pcv. I've read the new LT1s and LV3 v6s do something similar but put the condensed liquid back into the oil system.

LilJayV10

iTrader: (39)

I see what you did there.

Jimbo1367

I thought the buildup on the intake valves (KIA's DI engines) was from the placement of the DI injector. Anyone know where they have that injrcter? WHat about top contour of the piston?

Exidous

iTrader: (11)

No, the buildup is from the PCV system putting all sorts of crap back into the intake without any fuel/injector to clean off the back of the valve.

The Ford ecoboost has it the worst it seems. But that's mostly crap collecting in the intercooler.

Catch cans are good for most engines but should be a requirement on a DI motor. They don't install one though because they don't like the idea of an owner having to empty sludge out of a car under warranty.

Jimbo1367

Good to know. I thought GMs newly designed PVC system intergrated into the valve covers were solving the oil problem.

MIGHTYMOUSE

iTrader: (59)

thats what they say every damn time...

check this out tho...

Exidous

iTrader: (11)

Aye, they plumb it back to the oil pan. Still, that's a lot of sulfur, moisture and crappy oil mist going back into the system. But they are trying.

MIGHTYMOUSE

iTrader: (59)

actually im not sure of that.

it may be where they drain it on an oil change (I would certainly prefer that)

... still digging for more info.

MyFirstLS1

iTrader: (8)

I at least at BMW with there direct injection have seen some pretty good progress compared to the earlier DI motors from 2007. Not sure how this stands with other manufactures.