LT1 GDI owners
06-12-2018, 02:31 PM
#461
Pro
06-12-2018, 02:35 PM
#462
Pro
06-12-2018, 11:06 PM
#463
Burning Brakes
06-12-2018, 11:15 PM
#464
Pro
06-13-2018, 06:02 AM
#465
Burning Brakes
Service to the GDI requested by dealer at just 30,000 miles
06-13-2018, 08:55 AM
#466
Pro
Specifically, what is the service they are "recommending"? There is no GDI service recommended by any manufacturer. Sounds like a service department revenue enhancement. Are they recommending repacking the muffler bearings at the same time?
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911Hunter (06-16-2018)
06-13-2018, 12:01 PM
#467
It has been a while since I have posted on this topic. I authored the DIY thread on how to do your own cleaning a few years ago. Since then, I have ran a catch can and emptied around around 1 oz of oil from it every oil change. Its been about 15000 miles since that cleaning, and I plan to do another shortly. I will update this thread and my original DIY thread with photos/results.
Last edited by A471133; 06-13-2018 at 12:02 PM.
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glava2876 (06-13-2018)
06-14-2018, 01:10 AM
#468
If it was sprayed at all times yes, but then you take away the anti detonation effects of DI as you have a fuel present during the intake and compression stroke. When it does spray though is generally when someone is in full boost and that is when it does actually help.
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Same pictures over and over again, repeating the same phrases. First red flag.
Yes, there is an issue with the euro DI engines that idle and are driving by miss daisy.
Second red red flag is your statement above. Spraying meth will have no negative affect on the detonation reducing affects of DI. Completely incorrect. Shows a possible fundamental misunderstanding.
there may be a problem with some gramps driven DI Chevy engines. Any real pics? Remember, some people know what ports belong to which engines without being told. so no games.
Last edited by bc928; 06-15-2018 at 12:54 AM.
06-16-2018, 08:05 AM
#469
Burning Brakes
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vettetwo (06-16-2018)
06-17-2018, 08:59 AM
#470
Burning Brakes
What could happen with your warranty with a catch can:
https://www.corvetteforum.com/forums...tch-can-2.html
Maybe is better to leave the GDI alone and if a valve fails because of a bad engine design GM's warranty or your extended warranty should kick in.
https://www.corvetteforum.com/forums...tch-can-2.html
Maybe is better to leave the GDI alone and if a valve fails because of a bad engine design GM's warranty or your extended warranty should kick in.
Last edited by 911Hunter; 06-19-2018 at 08:33 PM.
06-17-2018, 11:01 PM
#471
Le Mans Master
40k miles on my 2014 Z51, multiple intake manifold swaps, and no issues with valve coking what so ever. These issues are WAY overblown, and frankly fabricated, on the LT1 engines by the guys slinging catch-cans just trying to make a buck (never mind the fact most owners will never even exceed the factory powertrain warranty with their C7). Comparing the LT1 from one of GM's original DI engines from a decade ago is simply stupid.
Last edited by Kracka; 06-17-2018 at 11:02 PM.
06-26-2018, 10:15 PM
#472
Corvette Enthusiast
Member Since: Oct 2005
Location: Troy & Dearborn, Michigan
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This is a 100k mile issue, not a 20k or even a 40k. And even then it's not as terrible as some make it out to be. Are there exceptions? Sure, but is there a large amount of engine failures? No.
Personally, I'd suggest if you drive "normally" to have the valves checked at 100k and if dirty have them walnut blasted clean along with the heads.
Personally, I'd suggest if you drive "normally" to have the valves checked at 100k and if dirty have them walnut blasted clean along with the heads.
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911Hunter (06-29-2018)
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vettetwo (09-12-2018)
09-11-2018, 01:10 AM
#474
09-11-2018, 10:07 AM
#476
Wow already has quite a bit of carbon deposits for just 9K. Too bad we didn't have port injection also to spray fuel across those surfaces. That way they would be much cleaner. Glad I have my catch can which may slow the deposits a little going forward. I have captured about 3 oz in 5.5K miles.
09-12-2018, 09:05 AM
#478
Pro
09-12-2018, 10:05 AM
#479
COSPEED: How about evaluating Byan's picture above. Some folks think it's clean. When you see a port injected engine at 140K, the port injector valve is cleaner than Bryan's. But the only picture I saw was yours(COSPEED) in the beginning of this thread. Bryan thanks for posting your picture.Appreciate it. Like someone else asked where you running a Catch can? It will be great if other folks have there top end opened up to see more pictures.
10-23-2018, 11:03 AM
#480
Burning Brakes
Having done time with a tuned BMW Z4 35i (good ol' N54) I can tell you that Walnut Blasting is not just a myth and actually works.
Depends on where you go, it'll run you anywhere from $200~400 and it's reccomended every 40~60k miles in the Euro Community.
Every GDI motor needs this done.
Depends on where you go, it'll run you anywhere from $200~400 and it's reccomended every 40~60k miles in the Euro Community.
Every GDI motor needs this done.