Trying to run Seafoam through Brake Boost

ril850 · June 19, 2005

I have an 04 Tahoe and I want to put some SeaFoam through it and clean the Top End. The 04's have no more PCV Valce so, it says to go through the brake booster line...Where the heck is that? Anyone have any pics on 5.3 where I can put this stuff in?

pacodiablo · June 20, 2005

Behind the master cylinder is a round thing (brake booster). There should be a hose coming off of it. That is the brake booster line.

There is probably some kind of fitting where the hose connects to the booster. That needs to come off the hose.

Haulin' 8.1 · June 20, 2005

If you have Hydroboost it won't have a vacuum line in the first place.

Vernon

ril850 · June 21, 2005

Your right Vernon my truck has a hydraboost becasue there is no master cylinder. Now I really don't know where through go to.

firstruck · June 22, 2005

After a year of looking for the elusive "brake booster hose" I finally just drilled a hole into the top of the plastic intake tube a few inches ahead of the TB and use a #12 1/2" sheetmetal screw to seal it up between doses of Seafoam. makes the whole seafoam thing pretty easy....

edit: I should add that made up a funnel contraption that fits into the little hole

pacodiablo · June 23, 2005

Your right Vernon my truck has a hydraboost becasue there is no master cylinder. Now I really don't know where through go to.

<{POST_SNAPBACK}>

Look for another vaccum hose I guess.

I didn't even know GM still used Hydroboost.

Haulin' 8.1 · June 23, 2005

I really don't have a lot of time to go into detail on this but here's my point: STOP pouring solvents into vacuum hoses of your engines.

It will cause a dead cylinder due to the oil being washed away from the rings. The chemical will drain into whatever cylinder(s) nearest the vacuum port of your choosing. I have personally ruined an engine like this, and I was injecting the chemical only during WOT in 5th gear on the hiway, it still didn't vaporize and disperse.

Here's what you should do if you must. Unplug your MAF if so equiped, your CEL will come on but don't worry. Remove the air intake tubing a place aside. Start the engine and let it get used to the missing MAF signal, about 20 seconds. Rig up a throttle stop that holds the throttle open just enough to maintain about 2500-3000 RPM at idle. Now SLOWLY (as in one can in 2 and a half minutes) pour the cleaner into the throttle body now sucking massive amounts of air. This will ensure that the entire intake system is cleaned and that all cylinders will recieve the same amount of fluid at a slow enough rate that no cylinder walls get washed away with liquid.

Sea Foam makes a product called Deep Creep that is a foam. You fill your intake with it and let it stand overnight etc. It is so light that it won't stay and hydrolock the engine when you go to start it. I reccomend you use this to do what you are all wanting to do.

Vernon