pDuB257 Posted February 25, 2009 Report Share Posted February 25, 2009 I have a 1998 Grand Prix GT 3.8L WITHOUT the supercharger and was wondering how to go about seafoaming my car? I have heard to put it through the brake booster line, but where exactly is the brake booster line located at under the hood for my year motor? Is there anyway I could mess up my motor or anything by dumping the seafoam in the brake booster line? Any help is appreciated. Thanks. Quote Link to comment Share on other sites More sharing options...
Night Fury Posted February 25, 2009 Report Share Posted February 25, 2009 Unplug that line with the car running. The line is like 3/4 inch. Pour 1/4-1/2 of can into line slowly taking care not to kill the engine. Then when you're almost done, drown it and let it die. Let car sit 5-10 mins Start, DRIVE HEAVILY. Quote Link to comment Share on other sites More sharing options...
pDuB257 Posted February 25, 2009 Author Report Share Posted February 25, 2009 Great, thanks for your help. Is there any way I could possibly mess up my car from using seafoam? Cause I don't want to blow my motor or anything. Also, that picture is hard to tell which line it is. Is that the brake booster line your are pointing to? Quote Link to comment Share on other sites More sharing options...
dodgethis Posted February 26, 2009 Report Share Posted February 26, 2009 How many miles does your 98 grand prix have? Quote Link to comment Share on other sites More sharing options...
Night Fury Posted February 26, 2009 Report Share Posted February 26, 2009 Great, thanks for your help. Is there any way I could possibly mess up my car from using seafoam? Cause I don't want to blow my motor or anything. Also, that picture is hard to tell which line it is. Is that the brake booster line your are pointing to? Uhh.... pretty much no. And yea that is the brake booster line... It goes into a dome shaped thing. Quote Link to comment Share on other sites More sharing options...
pDuB257 Posted February 26, 2009 Author Report Share Posted February 26, 2009 So I ended up using the brake booster line on the car but when I took off the brake booster line and started the car up, it didn't rev itself up like it did when I seafoamed my Chevy Cavalier, instead it just puttered and kept seeming like it was going to stall. Once I started pouring the Seafoam in the brake booster line, the motor started revving itself up. I put about half the can in the brake booster line and the other half in the gas tank and then I shut the motor off. After letting it soak for about 30 minutes or so, I started it back up and let it idle for a minute and then started revving it up hoping smoke would pour out since I have never seafoamed my Grand Prix before. I was surprised that only a little bit came out while I was revving it up; no thick smoke at all. Could it be because I dumped the other half of the Seafoam in the gas tank after I put half in the brake booster line? Maybe that has something to do with the amount of smoke coming out. I'm not sure. But regardless it did help get rid of a little hesitation and rough idle/starting of my Grand Prix when it was all said and done. Quote Link to comment Share on other sites More sharing options...
pDuB257 Posted February 26, 2009 Author Report Share Posted February 26, 2009 How many miles does your 98 grand prix have? My Grand Prix has 166,000 miles on it. Quote Link to comment Share on other sites More sharing options...
Night Fury Posted February 26, 2009 Report Share Posted February 26, 2009 If you could read, I said take it off WHILE RUNNING, but you seem to have done it fine anyways. No smoke means it was already decently clean up in there. Congrats, you have seafoamed a car! Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted February 28, 2009 Report Share Posted February 28, 2009 Pour it in slowly. You can lock the motor if you put too much of the stuff in at once. Quote Link to comment Share on other sites More sharing options...
Venom Posted February 28, 2009 Report Share Posted February 28, 2009 didn't Irondogg screw up his car by leaving the seafoam in the intake for like a couple hours or so and it clogged up his intake? Quote Link to comment Share on other sites More sharing options...
AWeb80 Posted February 28, 2009 Report Share Posted February 28, 2009 Ya, he didn't do it right. i just did the honda, and it smoked for 4 miles. runs great now. Quote Link to comment Share on other sites More sharing options...
Night Fury Posted February 28, 2009 Report Share Posted February 28, 2009 It wasn't Rob, it was someone helping him. I think. But Rob obviously had to fix it. Quote Link to comment Share on other sites More sharing options...
slick Posted February 28, 2009 Report Share Posted February 28, 2009 No, I was there. I told him to put it in, let it sit for 5 minutes, then start it. He let it sit for 4 hours, then tried starting it. He fouled his fancy spark plugs. Quote Link to comment Share on other sites More sharing options...
Night Fury Posted February 28, 2009 Report Share Posted February 28, 2009 LOL I guess it WAS him! Quote Link to comment Share on other sites More sharing options...
karrkrazzie Posted March 1, 2009 Report Share Posted March 1, 2009 Does it matter where you put the seafoam in.... I have heard let a vaccum line suck it in and DO NOT let the car die... may seem like a dumb question but does it change among cars... and which way is the best?? Quote Link to comment Share on other sites More sharing options...
AWeb80 Posted March 1, 2009 Report Share Posted March 1, 2009 Last Week, I just poured half the bottle in and then drowned it to kill the motor. let it sit for 5 mins or so. sure, it cranks hard, but the smoke cloud was huge. then went WOT for a few miles and it smoked the whole time. runs great now. ......this was on my civic hatch. Quote Link to comment Share on other sites More sharing options...
CSI_MuNkY Posted March 1, 2009 Report Share Posted March 1, 2009 Some people let the vacuum line suck it up, others don't... I get a friend to help me to it. while one of us keeps the idle up so the car doesn't die, the other dumps the whole bottle in a funnel that is in the end of a vacuum line, once the bottle is empty you let the engine die let it sit for a few minutes then go for a drive, then change your oil. According to the bottle, you can also add it to your fuel to clean the fuel system, and add it to the crank case to clean out sludge. Last time I seafoamed my car I did all 3 methods, added some to the gas, once I was down to half a tank I added it to the crank case, then after about 300km I put it in the vacuum line. Then I changed the oil, letting it drip out all afternoon just to be safe. Installed my filter and filled with oil... I'm sure someone is going to say that's overkill, but I don't care, lol Jamie Quote Link to comment Share on other sites More sharing options...
Andrew Posted March 1, 2009 Report Share Posted March 1, 2009 pour it slowly into the brake booster vacuum line. its the biggest vac line usually. Quote Link to comment Share on other sites More sharing options...
alphagtp Posted March 1, 2009 Report Share Posted March 1, 2009 I tried doing it to my 00 Jimmy and when I re-started it after the whole thing, it didn't smoked at all, why would this hapenned?? it was a while ago and it seems to be okay Quote Link to comment Share on other sites More sharing options...
Andrew Posted March 1, 2009 Report Share Posted March 1, 2009 that means the engine was clean, so thats a good thing! Quote Link to comment Share on other sites More sharing options...
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