got all. UCR dont reduce ground clearance the exhaust is still the lowest part. BUT the jack points may scrape on weird humps sometimes. They are closed and dont care.

 

Excellent. Mmmmmmm walnuts.

 

some ppl just dont know how to open up their eyes and actually read the whole thing.

 

I know right? Look at the end result picture?!?!!? It cleaned the valves END OF STORY. IT works. Wired started up his car and bam, runs like a champ. Theres the evidence lol.

I believe air filters are for keepings squirrels and kittens out.

So far from all of wireds posts I would say he's not the type of guy to troll over an entire group to get a laugh.

 

^^^^this. Lets applaud Wired and move on lol

 

agreed

 

And then drove it over 200 miles. I think it's safe to say I did it right haha.

 

Yeah a newer member doing How To's is great. A lot better than most new members we get.

I was going to do this Saturday, but going to be too cold.

 

Props to wired lol

 

I was going to add a couple tips to this post since it's in the How-to's.

1. I would suggest this order for start of project. Start car, pull fuel pump relay, takes about 30 seconds to die. Then pull the negative battery terminal.

2. Powell recommended unbolting the 4 bolts on the throttle body. I tend to agree. I had a hell of a time getting the cold side pipe on. Also would have prevented my plug from coming out and freaking me out.

3. Coarse walnut shells will work, I'm not sure if they are as affective, but they did work. had to tilt the gun upside down to induce flow. As said, load media through nose of sprayer.

4. If you intend to walnut shell and possibly clean with chemical, I would suggest using the walnut blasting first. The walnut stuck to so much of the chemical that it was a pain in the ass. So Walnut shell, then pick excess off, then partially fill the port with chemical. Leave chemical in place while you brush. Will keep the brush from gumming up.

5. Use one drop cloth over the engine as shown. Then I would suggest a second cloth as a curtain attached to the top of the hood. So when you go to blast you get inside the second curtain and the material won't leave the front of the car area.

EDIT: My total time was 12 hours. I did it all by myself and I'm no expert. Take your time. Double check which valves are open. Cover them very well. I still got shells in my open port.

 

This will be my summer project.

 

add make a modified gun with a 9 inch long tip lol. That makes it a lot easier. Its still a 7-8 hour job most of the work is in prep (like a dentist ) sealing off things etc. I use duct tape and towels in the immediate area and only cut open the tape to one port at a time. I also pull the spark plugs so I can move the car easily in 4th gear to make sure the appropriate valves are closed. I also use a very strong vacuum ( dont use the home vac) to help remove debris and also to run at the same time as blasting.

If you can have some one else do it, I think its a bonus. PS BEFORE you cover everything, tape off the alternator vents top and back completely with duct tape; silvrred didnt and the alternator objected strongly to having walnut shells inside.

PCV upgrade is worth it for sure....

 

unless its a dyson lol. i have a feeling im going to need to do my valves soon dont feel like it but at least i have a compressor at home lol. but uh oh, kill the alternator? lol.

 

I too had a few pieces in alternator. I blew it out, hopefully didn't have much in there.

I too had a few pieces in alternator. I blew it out, hopefully didn't have much in there.

Oh and cover the fuel pump hole that was disconnected when removing manifold.

 

Don't forget safety googles ear protection and respirator/mask

 

No doubt about the EP, does the Walnut shells cause a lot of dust though?

 

Yes. It blows into the port then straight back out. As I mentioned earlier a double curtain worked well. Also could try putting sheet around sprayer so it can't blow far backwards.

You are talking many pounds of little walnut shells. Not a ton of dust, just little pellets everyewhere.

 

I am curious why and how that PCV inside IM fail ?

 

^^^^wish i knew. i am suspicious about ring damage/carbon/ etc but car is not tuned. i replace as SOP but still have not had one failed...until now. I will take it apart maybe

 

Could it be bad engineering engine design from Chevy ? Cause I did research around here and I had found almost all DI for Cobalt are like this. This should be a recall.

 

The coking issue is not just cobalts. The real interesting question is, has it been solved in newer engines?

 

yelcal check the gunk thread. well documented its an industry wide issue.

umrdyldo: the C7 normally aspirated DI LT1 has a patented PCV system.

The upgrade I have come up with is based on an oil seperator which is used on diesel trucks, which by defintion have 1. no crankcase vacuum and 2. direct injection.

Should chevy have done better? Perhaps. They went broke in 2008 right?

 

yes they did.

Its a huge issue with VW tdi's, just google tdi intake manifold cleaning. Insane how bad the coking is for those engines, design your separator for a TDI (ALH or BEW engine code) and you'll sell thousands (and TDI ppl have money unlike cobalt ppl)

 

good idea. gonna find me one of those puppies. lol. thanks for the heads up.

what amazes me is the questions on here that ( no disrespect to the noobs asking questions) but why wouldnt the whole world google then ask questions?

 

and while I am at it getting mad at the " chevy shoulda done better" the reports that they knew that the ignition switch was an issue pre production? no kidding. but GM keep falling (even today) into that stupid bs stuff. It used to drive me crazy working with them. I would say straight out what i thought. They would try and read between the lines. There were no words between the lines. Car is crap fix this.
Car is good, keep it.

whats to read between the lines?

I shoulda known better with the ps issues we had in 2005 with the race cars." Its not the ps motor, its the duty cycle on the track being stronger than the algorithm allows." thy said. sure.

bs.

oh well.