02-28-2013, 08:33 AM | #1 |
Drives: 2007 Corvette Coupe Join Date: Feb 2013
Location: Florida
Posts: 39
|
Possible Issue With DI (direct injection)
I found a post on another forum and found it interesting and also a little alarming. It seems that the Direct Injection can cause carbon deposits to build up over a semi short period of time on the intake valve. This can cause a loss of power. There are documented reports on the BMW, the Audi and the VW, so I would think that it happens on other DI engines. It appears that the assistant GM engineer for V6 engines is aware of the problem.
here is a link to the article, http://www.edmunds.com/autoobserver-...-adopters.html I would hope that with GM being aware of this potential problem, and with over 6,000 CPU hours spent on the LT1 combustion chamber design they have addressed thsis |
02-28-2013, 09:36 AM | #2 |
Drives: 2015 Z/28 #533 Join Date: Jul 2012
Location: NY
Posts: 6,732
|
It should be fine since GM does not have a problem with buildup on the V6 engines. I would also assume that the LT1 doesn't have a problem because of its extensive combustion testing.
|
02-28-2013, 10:23 AM | #3 |
Drives: CGM 2SS/RS, 1987 & 2014 Silverado Join Date: Oct 2010
Location: Spencerport, NY
Posts: 1,012
|
They all have issues with DI because the fuel never flows over the valves to clean them. This is why many people are using catch cans to keep the oil out of the intake and off the valves. I believe the LT1 is addressing the PCV problem but only time will tell.
__________________
|
03-29-2013, 09:35 PM | #4 | |
Drives: '10 GTI for now Join Date: Feb 2013
Location: Ellicott City, MD
Posts: 196
|
Quote:
I own a 2010 GTI and with 47,000 miles I can almost guarantee you my valves are gunked up but good. Dieseling noise is significantly louder and I'm down on power from being first chipped 2 years ago. Both are classic symptoms so I definitely have a vested interest in hoping they've solved the problem. VW/Audi has not to date. |
|
03-30-2013, 09:12 AM | #5 |
Property USMC
|
Would it be safe to seafoam the intake with the car running on a DI motor?
|
05-09-2013, 07:52 AM | #6 | ||
Drives: 2000 Camaro SS Join Date: Feb 2010
Location: Louisville, Ky.
Posts: 25,179
|
Quote:
Quote:
Last edited by Apex Motorsports; 10-11-2013 at 02:03 PM. |
||
05-16-2013, 09:35 PM | #7 |
Drives: Porsche 928 S4, Mustang GT vert Join Date: May 2012
Location: SW Michigan
Posts: 64
|
My 1976 Chevy Nova 6-cyl Company Car required removal of head every 50K miles to de-carbon as part of the recommended maintenance.
It appears what is old is new again |
06-05-2013, 02:09 PM | #8 | |
Track > 1/4 Mile
|
Quote:
__________________
|
|
06-19-2013, 06:37 PM | #9 |
|
yeah that was an issue in the DI cobalts..
oil catch can and spraying some 75% meth should help keep mine clean..
__________________
2015 Corvette Z06.. Lime Rock Park 1:01; Watkins Glen 2:14; Thompson Speedway 1:21
|
06-24-2013, 05:55 AM | #10 |
Drives: Blk Z51 NPP J6F Q7T Red Interior Join Date: Jun 2013
Location: Texan stationed in Hawaii
Posts: 135
|
Pardon my ignorance, but can some of you more auto savvy types explain what exactly a catch can is, or those of you who currently are using one, provide pictures? Thanks a lot in advance.
|
06-24-2013, 07:28 AM | #11 | |
|
Quote:
__________________
2015 Corvette Z06.. Lime Rock Park 1:01; Watkins Glen 2:14; Thompson Speedway 1:21
|
|
06-24-2013, 06:08 PM | #12 |
Drives: Blk Z51 NPP J6F Q7T Red Interior Join Date: Jun 2013
Location: Texan stationed in Hawaii
Posts: 135
|
Awesome thank you GQ.
|
06-24-2013, 06:13 PM | #13 |
|
__________________
2015 Corvette Z06.. Lime Rock Park 1:01; Watkins Glen 2:14; Thompson Speedway 1:21
|
06-25-2013, 09:28 AM | #14 |
Drives: Blk Z51 NPP J6F Q7T Red Interior Join Date: Jun 2013
Location: Texan stationed in Hawaii
Posts: 135
|
|
|
|
|
|