View Full Version : Sea Foam or GM Top Engine Cleaner?

01-10-2005, 10:49 PM
Anyone used either of those lately, and is one any different from the other? My car has 78k miles on it and I'm not aware of anying using this kind of engine treatment on the car. Any feedback on how good this stuff works? Anything else I should know about this stuff?

01-11-2005, 10:59 AM
plan on replacing your spark plugs after wards...

i use sea foam because its cheaper than gm top engine cleaner and both do the same thing...

pour one can in a vacume line slowly (you may need to massage the throttle to keep it running) and when you have about 1/3 of a can left, dump it all at once and let the car flood out.

let it set for about an hour. put another can in your crank case with your oil and run (idle) for about 10 mins and then change the plugs once the engine cooled off enough. drain the oil and fill up with fresh stuff and a new filter.

01-11-2005, 11:45 AM
why in the fuck would you pout that shit into the crankcase! I do not recommend that at all. If your bottom end is sludged up from piss poor oil change intervals, the viscocity change from this stuff washing out the sludge will all but kill the motor in short order. If you change the oil when its due, then you shouldn't have any need to ever pour anything but oil in your crankcase. Some people use kerosene inthe crankcase to clean the motor out, which I am only hoping is a similar scenario for the extremely harsh top engine cleaner.

You are gonna have a hell of a time pouring fluid into a vacuum line. You will want to have a long, narrow piece of vacuum line coming off the engine to put into the bottle. You will have to crack the throttle some to keep it running. When its about out, let off the throttle and it should die. You don't want to dump a shitload at once into the motor, in case you get too much into a cylinder and it cannot compress the liquid. Also, you want to have the motor at operating temp. I never let mine sit for an hour, 15 minutes will usually do. The idea is for the heat to help the cleaner attack the carbon buildup.

Be prepared for a smoke show when you try to start the car back up as well. It will be a pain to start, then after you do have it running you will want to drive around at varying throttle positions to clean all the junk out of the motor. A new O2 sensor would be a good idea afterwards too, though I have noticed no adverse effects of this process in the computer using a scanner.

01-11-2005, 01:40 PM
GM top engine cleaner worked great for me, back in the day.

01-11-2005, 02:44 PM
it says you can do it right on the can.

ive done it many times one my 3100 and it lasted about 160,000 miles

ive done it to every engine ive owned even with regular oil changes there is a sludge buildup. its the natural byproduct of any oil you use.

its basically solvents and wont hurt your engine.

01-11-2005, 05:23 PM
http://members.nuvox.net/~on.roz/cars/z28/seafoam.html is this site I was looking at on how to use Sea Foam.

01-11-2005, 05:26 PM
sounds like what i said

01-11-2005, 11:29 PM
The bottom of the oil pan is the only place I saw any sludge in my motor when I tore it down. I guess its safer than I thought but its still never going in my oil pan.

01-12-2005, 01:11 AM
I used to think I could fix my engine with some 'additive' and a new sensor.

01-12-2005, 11:40 AM
I've known a few people to just use 3 qts of water with the engine
at operating temp... I was actually considering this method. Best
yet... it's free. Gotta do it slow to avoid hydro-lock... no need for
new plugs.

01-12-2005, 12:17 PM
Ive heard of a mist of water in the intake to help break up the carbon....but 3 quarts. The only place 3 quarts of water belongs is the coolant passages.

01-12-2005, 12:27 PM
or in my belly.

01-12-2005, 04:38 PM
Pouring water into the engine doesn't sound like a good idea at all. I think I'll stick with something that's made to go into the engine.

01-12-2005, 07:23 PM
Oh, it works. Use a spray bottle and use either water or trans fluid. Works wonders, it really does.

01-13-2005, 02:01 AM
Oh, it works. Use a spray bottle and use either water or trans fluid. Works wonders, it really does.

trans fluid?!!?

i don't think water would hurt anything or even alcohol....after all lots of people use alcohol or water injection on turbocharged engines. not only is it a "chemical intercooler" but i've heard it also steam cleans the combustion chambers.

01-13-2005, 02:18 AM
I think some ideas are mixed up. I've heard of using a few qts or so of tranny fluid in the CRANKCASE for a short period of time to take advantage of its detergents and remove sludge. I've also heard of using water down the INTAKE of an engine to clean the combustion chamber.

01-13-2005, 02:31 AM
actualy, we were talking about tranny fluid in the crankcase at work today (im a transmission tech). atf will actualy help clean the engine out. just dump about 1/2 a liter in the crankcase (make sure you dont overfill it) and leave it for a hundred miles or so, then change the oil.

ive heard seafoam works wonders. ive never tried any of those tricks before. i have heard the water trick works well (use a spray bottle and spray it on the tb). as for alcohol, it deffinitly wont hurt your motor. race motors run on straight alcohol, so it isnt gonna hurt anything. basicly do the same thing with it as you would the seafoam.

01-13-2005, 07:19 PM
Wow, I guess you can put anything in the crankcase if you want to really clean the engine, lol, everything from water to ATF to alcohol, lol. Wonder how well shampoo works?

01-13-2005, 07:22 PM
Also found this site today if anyone's interested.


01-13-2005, 07:50 PM
Nice, that mentions the water thing again. Thats a bit more water at once than I would have thought was good but I guess its no different than the top engine cleaner. TEC will burn though, and definetly breaks down carbon well (more so than the cheap bottles). Tested on a torn down motor, letting each type soak on a piston.

01-13-2005, 10:21 PM
I have had no adverse effects from using Seafoam, also if you drive on it in the crankcase, use 10w oil and change it before winter.