My car went in to the dealership today to get the valve scoped because i noticed rough idling misfires and my fuel trims were all over the map. They got back to me today they are pulling the head, cleaning it out and rebuilding it.

 

Really? Aren't you on an aftermarket turbo setup?

 

Has nothing to do with the turbo. Its the direct injection. I have 65k on the car now. Its great when you know a dealership that employs smart people and not a bunch of retards who are in business just to make dough and to scam u out of warranty. Or better yet those dealerships who simply do not have a ******* clue how to service this kind of car. When u find a good fair one with a tech who knows what hes doing u take it there and nowhere else. These cars were not designed to give u 100 000 miles whoever has that many miles your car must run like complete dogshit cuz of the caked valves. These cars need new heads every 60k.

 

You woulda came to my dealership with an aftermarket turbo setup and complained about a rough idle I would've thrown your ass out.

 

My car has similar mileage to yours so far has not experience idle issues yet. I hope to get to around 90K kms then at that time I am thinking of getting the head rebuilt/cleaned regardless.
Is it worse on the intake or exhaust side?

 

I've got almost 67k miles without any idle problems.

 

Interesting, ima have to open my IM up and c whats under!!

 

 

interesting, I need to pull my head and take a look at it. Wonder if this is my problem too

 

Brought my car into the shop after it up and died on me, and the mechanic said that there was a compression problem in all cylinders, sticky valves possibly from the junk build ups? or possibly could a valve been bent or stuck closed?? I need alot of help with the problem can someone help.

 

If its all the cylinders its not a bent valve.

 

Miles?

What were your ratings on each cylinder?

 

I can't wait to get the rest of the Walnut blast setup shipped to me.. so I can have a clean LNF head!!!

plus waiting to get two complete LNF head shipped.. port/polish and install other FMSR goodies..

 

I have 104,000 miles on my 08 and it runs perfect. I have seafoamed once at about 95k miles and that's it. That said, I have a 72 mile commute to work (one way) of which 95% is interstate doing at least 70mph. I also keep the rpms at least 2.5k when cruising in town to try and keep the intake temps up. I have yet to pull the intake off to see what my ports and valves look like and I'm expecting it to be pretty gunked up but it seems to me that my long commute has really helped keep this problem at bay.

 

check the intercooler drain. If there is oil there, you can expect your valves to be coked. good luck.
OUr PCV system is installed and running in Loki's car, the production run will start with Steddy 2112's car, probably for TOTD later this month.

 

If you're going all the way to TOTD, you might as well come to VIR sometime :P

Nov 12-13

 

I can mail you the part to complete your system u already have from totd or here, doesnt make a lot of difference...lmk email.

 

John,

Is your system in beta or have you released it to the public yet?

Also, I sent a email too..

-Rudy

 

Have 21,xxx Kms on mine. John bore scoped my intake. Looks like crap :-(

I hammer on it all the time. Warranty through GM, then the PRS cure...

 

sent u an email. all is done, I am just waiting on the proper catch can the product is not available in any quantity easily in the USA. So its a matter of days I hope. I am quite happy how it has turned out, and thanks to Wangspeed and T man for the inspiration and assistance, and of course, the inside track we have here which has helped a lot. Thanks to you for your thread, it helps to shine a light on an industry wide issue . We all have to look for solutions pretty much on our own....the industry engineering community is in 2015 ,or even further out, in their work pretty much.

 

Ha.

 

john- this good news!!

no need to thank me, Im just glad we all have a friend - John Powell, to keep the community active in progress within the ecotec market!!

 

Can you send me some more info too?

 

FWlW, maybe Corvette engineers came up with a totally new PCV system for DI? For one it is patent pending so which means it has to be new and no one has adopted this idea yet I am guessing? Hopefully this will be a solution for all the DI engines in the future. Wait till they release more info on the new LT1/C7 Corvette. John, do you know anything about this????

This was taking from Corvette Forum.


Our own Steve Burns attended the engine seminar live this morning and here are some of the details that have emerged:

New Chevrolet Corvette V8 is 6.2 liters, designated LT1. This is the 3rd time for a Corvette engine to use that RPO code.
0 to 60 mph in less than 4 seconds. Entry-level car. 450 hp or more!
New Corvette will use cylinder deactivation. Will go from 6.2 V8 to 3.1 V4 for better fuel economy.
New V8 engine has 11.5:1 compression ratio. Direct fuel injection, cylinder deactivation; continuously variable valve timing; active fuel management
450 hp 450 lb-ft of torque. More than 26 mpg!
New engine has a unique and complex piston head.
New LT1 V8 has 50 lb-ft more low-end torque than current LS3 V8; matches the LS7 V8 from the Z06.
LT1 engine to be built at Tonawanda engine plant in Buffalo.
Premium fuel recommended, but not required.
Spark plug is in the center of the chamber. Intake and exhaust valves are reversed.
There will be an optional 11.5 quart dry sump oil system available for the new LT1 V8
6,600 RPM fuel cut off in the new LT1 motor
All the new technologies on the LT1 make it a heavier motor than the LS3
Patent-pending PCV system
Final performance ratings will come in 2013
Peak horsepower around 6,000 RPM; peak torque around 4,000 RPM
New combustion process to be documented in an SAE paper to be published in the Spring of 2013
LT1 is the first OHV engine with Direct Injection

 

Probably a catch can