I've got 126K on my 93 Z28 and been thinking about running some of this stuff.

Is it a good idea? I've heard mostly good - but some bad as well.

Where exactly would i put some - i've heard to buy 2 bottles - one in the gas tank and the other in the oil?

thanks

 

This is my 2 cents.

Do not put Seafoam or anything else in the oil. I fear it can mess with the oil wedge and ruin a bearing especially if the bearing is on the edge. In the fuel, cant hurt.

Here is where it shines. Use the opti vacuum hose connected to the intake to suck it out of the can. Since you are non vented opti, use the small vacuum fitting on the passenger side of the intake and some longer hose to again, suck the fluid right out of the can. The brake booster hose IMO is too large and draws the fluid out too fast.

Let it suck till the motor starts to stumble then pull the line out of the fluid. I do this several times. Some like to let the motor choke and let the fluid sit in the cylinders but i dont see how this really works well unless you cylinders are straight like in a straight 6.

In the process of doing this you are going to make a white steam cloud the size of Texas so make sure you are well out of the garage. I think it does wonders to de-carbon the motor and clean the intake valves. All you need is one bottle.

 

From my experience it is a wonderful solvent when mixed with fuel. I don't do the seafoam in the intake anymore. It is really hard on the O2 sensors and cat. I had to replace both updraft and down O2 sensors in my Jeep after doing it and had no noticeable gains.

A friend ended up taking his Eclipse to the dealer after he did the seafoam intake thing... I think he did it wrong and dumped it in or something because it hydrolocked... lucky no further damage afterward. I know it is user error but it shows if you aren't careful you could have problems.

 

well i would think a good fuel injector cleaning would be better? I normally have a mechanic hook it up straight to the fuel lines and he runs a cleaner through them for about 20 minutes. There is no white smoke show though.

I thought this stuff was supposed to be safe for O2's and cats?

 

I can't help to think that if one runs a good quality high octane fuel then the valves and such should stay pretty clean - eliminating the need for this type of thing?

 

Personally I would not use anything in the gas. If I need to clean the injectors, I will pull them from the motor (10 minutes) and send them off to be cleaned the right way.

Good fuel does not guarantee clean motor. You are at the mercy of the PCM ensuring that air/fuel ratios stay in check. Any number of things but mostly O2's can cause things to get a little out of whack and axcess carbon to build up on thre piston tops or the intake valves. I have heard tha climate plays a role too.

Also the properly working PCV system will cause small amounts of oil to be burned especially if you hit WOT a lot or start making big power. Recently I smelled oil burning on occasion. I pulled the throttle body off and the inside of the intake was drenched in motor oil. I passed a leak down test so I was like, WTF. I determined it was coming through the PCV so I added a catch can and now its no longer a problem.

The seafoam should knock the carbon off the pistons doing it the way I described above. Excess carbon on the pistons can lead to detonation which is not good. So clean fuel does not entirely eliminate the need for an internal engine cleaning.

Again. My 2 cents.

 

This write-up was the most helpful for me:

http://www.ls1tech.com/forums/genera...-your-car.html

 

Is the optispark suction better than the brake booster suction?

 

i've seafoamed 3 vehicles... i've never had a problem with seafoaming a vehicle.. done a 2004 dodge ,95 ford f150 with 150,000 miles on it, and a 94camaro with 60k miles on the engine...

i just did a 2nd fuel treatment in my camaro just because i had 1/2 a can leftover and the car sat for a year before i bought it..

i think seafoam is a good product, its been around for a long time so it must be doing something decent...

 

NO! I put it in the oil on my DD when I got it with 50k miles (cuz the oil meter was BEGGING to be changed). Long story short, SeaFoam ATE cam shaft seals and valve cover gaskets................$1,500 at the dealer. It's an expensive little bottle.

 

thats odd i never had any problems with seafoam over the last 15yrs. you sure the dealer wasnt jerking your chain?

 

Modern oils have pretty aggressive detergents in them already. Especially synthetic blends. Putting seafoam in the oil of a car is likely to do more harm then good.

Now oil that doesn't have detergents like for lawn equipment could benefit from a seafoam treatment every great while.