Alky cleaning

[Turbo6Smackdown]

Ok, I keep reading where "if you run alky, your valves stay cleaner", when Julio told me that the meth or alky's totally vaporized pretty much as soon as it leaves the nozzle. So if it's totally vaporized, how's it cleaning valves?

 

[Razor]

The gasoline from the fuel injectors is what typically cleans the valves. The carbon deposits on top of the pistons is what gets cleaned out. A lot of oil accumulates inside the intake from the PCV system. That oil gets into the combustion chamber and turns into carbon. Sorta like when you run "Top Engine Clean"

I think in the future i'll sell a bunch of kits to the direct injected apps as on those fuel is pumped straight into the cylinder and the intake valves will get coked up. Example the V6 Camaro and the new Vette.

 

[Turbo6Smackdown]

How does the carbon on top of the pistons get cleaned out? The alky's vapor by the time it's half way thru the intake runner...
And on the direct injected model. How does the intake valve get coked up? The only thing running across a valve, especially an intake valve on a direct injected engine is air.

 

[Razor]

Oil gets into the intake through the PCV. same as it does on your Buick. Unless you run a catch can... But catch cans don't come from the factory.. Best they can do is to make elaborate valve covers to minimize it.

You may not understand how something works, that doesn't mean it doesn't. Simply just tear apart any motor running meth injection and you won't see the normal carbon buildup as you would had it not been used.

 

[kidglok]

I found solidified residue from the gasoline on the back of my valves. Had orange/red color mixed in it, which I believe is the additives used in today's pump gas.


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[wiseman]

I will definitely agree with razor about the alky actually helping to clean your system.

I had an excessive amount of oil blowing by my pcv getting thru to my throttle body. The oil would blow out all of the vacuum block and get through all the cracks and joint that was on my tb. I had so much on top of the vacuum block, there is oil spot on my hood heat shield.

I am in the process of replacing the pcv , adding rjc pcv, and power plate, so I was removing the intake to clean it and what not. I already prepared myself see a nasty, oiled up intake chamber and runners. But to my surprise the chambers and runners were extremely clean, almost spotless! I was so surprised. I ordered a catch can to install it, and I was thinking that I didn't need to after seeing the clean intake, but I still will install it since I have already purchased it.



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[pacecarta]

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[Steve V]

[quote="Turbo6Smackdown, post: 3314146, member: 18914 The only thing running across a valve, especially an intake valve on a direct injected engine is air.[/quote] The PCV system is still working and oil will get sucked into the intake. This will gum up the valves and can make them stick esp on cold start-up. Lots of MFG's struggling with this on direct injected engines....GM is one but they are not alone.

 

[1fastcobra]

Oil gets into the intake through the PCV. same as it does on your Buick. Unless you run a catch can... But catch cans don't come from the factory.. Best they can do is to make elaborate valve covers to minimize it.

You may not understand how something works

Watch "Joe Dirt's Dad" on YouTube

.

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[pacecarta]

m

 

[1fastcobra]

Watch "Shitter's Full - Christmas Vacation" on YouTube

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[Meg's Dad]

Steve's right. Hop over to an Audi board and check out some of the horror stories with the FSI 4.2 V8's. Specifically, those found in the B7 RS4. Great motor, but the carbon buildup is really out of hand and it's a toss up as to how much the dealership will hit up for a cleaning. The 2.0T's, found in several VAG products, suffers from this as well.

Oh and here's my most recent Audi. Love the brand, so I'm not talking junk, just the facts.



Regards,
John

 

[Steve V]

Steve's right. Hop over to an Audi board and check out some of the horror stories with the FSI 4.2 V8's. Specifically, those found in the B7 RS4. Great motor, but the carbon buildup is really out of hand and it's a toss up as to how much the dealership will hit up for a cleaning. The 2.0T's, found in several VAG products, suffers from this as well.

Oh and here's my most recent Audi. Love the brand, so I'm not talking junk, just the facts.

View attachment 212818

Regards,
John

Really don't need the dealership to clean it. All we do is use top engine cleaner, usually it works. If it does not then engine comes apart and valves get cleaned. On a GM 5/100,000 powertrain warranty covers it, on any other MFG???????????

 

[Meg's Dad]

Yeah, that 5/100k thingy doesn't really exist in the land of schnitzel...

 

[Steve V]

Here's a pic of 3.6 gm intake valves with 32k on them. They are sticking on cold start causing misfires. We did extensive decarb and while the seats are clean the actual stem remains untouched. The fix is to remove all the valves and clean them. Warranty of course

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[1fastcobra]

Looks like the oil was never changed just added when low.

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[Steve V]

Based on her service history it had been changed atleast every 5k. 2011 Lacross uses dexos...gm semi synthetic. Engine is clean under valve covers, timing cover.

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[Razor]

I just looked at the video's.. coughed up my breakfast..

thanks guys

 

[bison]

Here's a pic of 3.6 gm intake valves with 32k on them. They are sticking on cold start causing misfires. We did extensive decarb and while the seats are clean the actual stem remains untouched. The fix is to remove all the valves and clean them. Warranty of course

Posted from the TurboBuick.Com mobile app

This is going to be a huge problem in a lot of engines in the future. I wouldn't be surprised if some engines start to come with vacuum pumps and some kind of dryer that separates the vapor from liquid and allows the vapor to be fed into the intake tract to minimize liquid oil and fuel from entering the intake ports.

 

[bison]

I wonder how many catalytic converters will fail because of cold misfire because of sticking intake valves? Will they cover those too?