SeaFoam advice

[Browning151]

I have a 2002 2500HD with the 6.0L. I picked up some sea foam from the parts store today looking to try to quiet the engine down a little by getting rid of some carbon build-up. Can anyone help me out with where the main vacuum line is on this motor and any other tips when doing it? Thanks in advance for any help guys.

[thadrawr]

pour half a can into the gas tank and you should be good to go

[wrparks]

Never tried it myself, but I've heard of people sucking it up through the PCV valve line. Typically, they suck up and let burn about half of it by pulling the hose in and out of the can (don't let it stall). Then, suck it up until it stalls. Let it sit 1/2 hour, then crank it up. No idea if this is a good idea, but I know lots of people that do it. And it will smoke like crazy.

[thadrawr]

ive used it before it makes a ton of white smoke from the exhaust i even scared some kids who were outside playing cause i had to keep revving my engine to keep it from stalling and more smoke kept comming out

[Browning151]

So the vacuum line to the pcv valve is the one that i need to use to suck it into all cylinders? I read somewhere on another forum about using the vacuum to the brake booster, but this is the weirdest brake system i've ever seen, it connects to the power steering pump. So i guess i will try the pcv valve line. Hopefully all goes well....will post back with some results tomorrow

[Rivx]

I've used it a couple of times. Poured it slowly down the throttlebody. Never got any smoke though like every says it does. Guess there wasnt much carbon built up. These were both 140+k engines.

[wyatt_earb]

For carbon build up I've always had good luck with tranny fluid. I just run a quart through the brake booster vacuum line, smokes like the dickens though. Also have heard of using water, running it through a cold engine though....

[BlenderWizard]

The main vac line goes to the brake booster.

[Browning151]

I tried to find the main vac line on this truck, but it doesnt have the big round booster on the firewall like other brake systems I have seen, theres 2 or 3 hoses that go to the power steering pump. Never seen anything like that, it has 4 whl disc brakes also. I have since ran 1 can through the tank and after about 100 miles or so it seems to be a little better but I will still like to find the main vac line for the 6.0 and make sure im using the right one

[2000CAYukon]

Originally Posted by Browning151

I tried to find the main vac line on this truck, but it doesnt have the big round booster on the firewall like other brake systems I have seen, theres 2 or 3 hoses that go to the power steering pump. Never seen anything like that, it has 4 whl disc brakes also. I have since ran 1 can through the tank and after about 100 miles or so it seems to be a little better but I will still like to find the main vac line for the 6.0 and make sure im using the right one

You have the hydroboost setup where they use fluid pressure from the ps pump instead of engine vacuum. In your case, the PCV valve will be the largest vacuum hose to use.

//2000CAYukon

[Browning151]

Thanks for the tip yukon, I thought that was the weirdest brake setup I had seen. PCV valve it is then!