colodude18

iTrader: (4)

Same here. I put in brand new valves and a ported head last spring that has v3 installed. I only drove ~600 miles with it but they were pretty serious miles. Ask my engine how serious lol

tomj77

iTrader: (2)

Hmm i have an extra gasket, but do i want to part with it?

Snail_SS

iTrader: (3)

Yes you do tom

3-UP

Or even easier just paypal $20 to me and I'll rip it apart tomorrow for a photo session. I would have done that in a heartbeat to see the results before I bought mine..

ThoR294

I'm about to install mine. 140k with valves never cleaned pretty sure. Instructions on install from Powell are kinda weak haha

heeter_33

You should definitely clean them before you install it then.

I thought the instructions were a little weak and then he sent me better ones.

umrdyldo

iTrader: (1)

Show us your valves! I'm not sure I have seen a set with that kind of mileage. I bet it's awful.

Snail_SS

iTrader: (3)

If he doesn't I will I have 104k never cleaned them, my plan is to eventually get the separator and clean the valves. Then again 140k is a lot more lol

royce777

iTrader: (29)

thinking I really should invest in one of these for my sedan since it only has 6k on the new LDK

umrdyldo

iTrader: (1)

Luckily you live down south. When it's pretty cold, the misfires at startup are very noticeable.

Snail_SS

iTrader: (3)

Yeah I've never had any problems with my car, the winter here has been really mild

soundjunky

iTrader: (4)

I was provided with more than sufficient instructions...
IIRC you are given a link, and can print them off...
(IIRC because it has been a couple years)

63 Nova SS

iTrader: (3)

Sox fan sent me the ones he used and I figured it out.

ThoR294

Yeah I found the right link. Better instructions.

I am DEFINITELY cleaning the valves. Also, I do have a cold start "misfire"... But would the carbon effect that? DI doesn't spray on the valves so the carbon won't soak the fuel.

umrdyldo

iTrader: (1)

Cold start misfires are usually from carbon on the valves.

ThoR294

I wouldn't be surprised if that is my issue. 140k miles with no cleaning.

Unfortunately, I got stuck doing an 03 expedition radiator/cooler lines/trans service on Monday. Trans is fried in that bomb, he drove it with like a quart of trans fluid haha.

Anyway, I will post pictures when I do it

Zo6balt

looking into protecting my car for the long term. I'm at 102k miles. Does Powell's air oil separator really work or is it just as good as a proper catch can set up?
Been researching and seems it may be a waste of time and money.
it is 2020, these threads are 10years old.
has no one figured anything out by now?
How do we stop valve coking!?!?

Snail_SS

iTrader: (3)

Honestly I haven't heard much. All the people that have installed it haven't really posted if it helped or not. I know that on big turbo it doesn't work. Thats to what another member found out and made his own kit in the end. Stock turbo at least to my knowledge is unknown if it works or not

Zo6balt

wonderful.. so basically don't waste the money lol just save for a new head and go from there.
snail what have you done with your pcv system? How have you dealt with coking?
I wish powell was active in the forums still. seems the community is not very active but given since this platform is aging.
lastly, engine swapping. I know its off topic but what is the best engine design to swap into for an lnf? Ldk?

soundjunky

iTrader: (4)

My knee-jerk response is that you haven't really done any research, because if you did, you would see how the above quote is beyond being just a little silly.

Did you even read, oh let's say the first sixteen posts of this discussion?

Here's the thing;
You don't have to add anything to the factory PCV system if you don't want to.
If you leave the stock setup as-is, just do regular intake/valve cleanings, and sleep well at night.
Or you can install one of the POS oil catch cans to have a false sense of security.

Again, this second part of your post only serves to confirm that you're just spit balling, and have done absolutely no research.

Nothing is perfect, so there's no way to remove 100% of the oil from the intake charge;
This is just the negative side of DI.
John even said this, and others have proven that the dirty side PCV valve can still let some oil in, but the main source of oil being introduced in a stock system was not at intake manifold mounted PCV;
The main source of oil being intruduced into the intake charge is what's been addressed;
Since the main source of oil being introduced to the intake charge is addressed, this pretty much negates the need for any previous suggested interval for intake cleanings, as they will be much less frequent.
For a street driven car, maybe it's not worth it, but for a track car, I would suggest that it absolutely should be considered.

When these cars were new so was direct injection, it was only after these were out there for a while that the positives attributes of port injection's "washing" effect were known over DI;
It was during my ownership of this car that the likes of BWM developed procedures to deal with oil build up on the intake valves was developed - IIRC GM followed suit shortly thereafter, initially copying BMW's walnut cleaning, and then offered their cleaning agent.

John is still doing his thing, he is in some of the FB Cobalt groups, and normally speaks up when tagged - but lets be honest for a moment, this whole forum isn't what it was a decade ago;
A decade a go it was REALLY busy in here, now you can virtually hear crickets. lol
John was never in this scene to make money off us, he was here because he likes the platform, and wanted to offer some parts that the rest of the industry didn't offer - which is why his site never had delta parts.

But back to the comment of these threads being ten years old;
First, that's flatly false;
John only started offering his setup eight years ago, so any discussion about this part couldn't possibly be a decade ago.
But incase you're going to say something like "eight is nearly a decade", well then, this thread was only started in 2015;
2015 to 2020 is not a decade.

Also, if there is nothing of substance worth adding, then why should anyone add more to a discussion?
(I chimed in because I have a several year old subscription to this thread that I still get alerts for, and thought your comment needed something of a rebuttal)

Please do your research;
Please don't suggest that this is no better than a generic oil catch;
Posts like that only serve to suggest your ignorance.

Once again,
You don't have to add anything to the factory PCV system if you don't want to.
If you leave the stock setup as-is, just do regular intake/valve cleanings, and consider it done.
I bought mine because my job requires that I put alot of miles on my car;
I installed it when I did an engine swap.

Snail_SS

iTrader: (3)

Yup just whats stated above. Regular cleaning would do the trick to keep them clean but you would atleast need to do it yearly. I haven't done much research since finding out that the separator won't work like it should on a zfr size turbo. Its on my plans to clean the valves just haven't gotten around to it but I have everything I need other than the brushes and that stuff

Zo6balt

I have read multiple threads and i was not convinced either way, i am in no way an expert on these cars so forgive my ignorance. I was just hoping so far into the future since the threads were last touched on, maybe something had changed, new tech.. ect...
but you guys have given me the answer i needed. I'll save my money to clean my valves periodically, use top tier fuel, low ash oil and drive appropriately as John stated in a post.
thank you gents

Snail_SS

iTrader: (3)

Yeah man maybe if you do it or i do it we can share some pointers lol

blu3_v1p3r

iTrader: (6)

Speaing of all this, makes me wonder again what mine look like, I haven't cleaned them ever, should probably look in to it maybe....

Snail_SS

iTrader: (3)

Same here. Well I haven't done it since I got the car with 81k miles. I'm sitting at 105k right now and haven't done it. I doubt it was done before me