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seafoam works! [merged]

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cranky

Probationary Member
12
2
Nov 15, 2003
I have been using seafoam in heavy equipment engines for years and I have seen it make dramatic differences in performance and idle quality. I recently had a problem with low power from my 91 talon. It felt like the computer was removing timing. Normally what I do is find a secluded spot because you will smoke down your whole neighborhood. Start the engine and let it get up to opperating temp. I remove a vacum hose and put it in the can and rev the engine to about 2500 rpm and suck the can dry. Shut off the engine and let it sit for about 15 minutes. Then start it back up and run it down the road, and run it hard. This will remove a substantial amount of carbon build up from the combustion chambers. :thumb:
 
You don't need spray anything. Use the liquid stuff. Use a vacuum line to suck it into the intake system with the revs held at about 3000rpm. I usually put a line on one of the throttle body ports. Use a half a can or a little more that way. It will smoke. Then drive it hard and it will smoke some more.

You can also poor a little straight into each cylinder and let it sit for a few hours or even over night. It will probably smoke after that as well.
 
iv done alot of reading for this LOL and just want to clear everything up before i stick some random liquid in my engine.....

what are the best places to "inject" seafoam and how much should i be putting in, in each spot??

i have never touched a can of seafoam before so whats the best thing i can do for my car tomorrow with it?
 
I did half through PCV hose and other half through BOV line. Brake booster hose will allow product to hit more of the IM though.
 
Actually Marvel Mystery Oil can be purchased for $3.99 a quart, versus $3.99 a pint for Seafoam. And I find the MMO works great, using it for the same things as seafoam; sucking it into the intake, and also soaking the tops of the pistons with it to clean carbon off of them.
 
Yes, I know this a dsm forum, but if you guys can help that would be great. I have a 1992 Chevrolet Corsica and I want to know which hose to use to suck the Seafoam in. Thanks!
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Just put a full can of :thumb: seafoam in my 90 TSi AWD. Stock as a rock with 200k on it. didnt notice any performance gains but wow my idle is damn perfect! I will probably be getting better gas mileage now also.
 
That post was a while ago, but I don't really get it. What does the fact that it costs 48 dollars a gallon have to do with anything? You aren't running your car off seafoam LOL, it's a treatment you do every once in a while. That's like saying cough medicine is expensive it costs $xxx a gallon. Ok, but are you always sick?

I have both seafoam products, I ran the engine treatment once and I also had a can of spray style. The spray works like liquid wrench and it's lasted me for a while and still going.


Wll last night I was at the autoparts store, and Seafoam is now $6.49 a pint. I think it's pretty friggin ridiculous.

No I'm not running my car on the stuff, but I've seen it go from $3 to now almost $7 a pint...I was just putting it in perspective, because most people don't really do the math.

MMO is a better deal if you want to clean the intake IMHO...and for piston soak and also mild engine flush. Also 4 oz per 10 gallons of gas in the tank is what they recomend. As opposed to a full $6.50 can of seafoam in the tank.

And yes my car IS ALWAYS SICK, it's a DSM LOL. It burns oil which means it needs a good intake and piston cleaning frequently.

Don't tell me to rebuild it because I already tried that, got burnt.
 
I put some seafoam in the "P" thing on the TB, insead of almost stalling it reved to like 4000, any idea why this happened? Is it normal?
 
I just did this. Holy shit thats a lot of smoke. Just when adding it into the system its smoking like crazy and burning my eyes. It stalled once while sucking it in through the BOV vac line, hopefully I wasnt doing anything wrong. I only put about 2/3s of the bottle in b/c I couldnt see anymore. I live in a big apartment complex and my neighbors are gonna love me in about 20 minutes. So about that long Ill find out if this helped me any. Any suggestions from anyone?


oh and for a future reference... dont wear nice clothes when you do this. I didnt change thinking I wouldnt get dirty with something so simple but I F'in stink now. I felt like I was at a 70s party and some coke head was playing with the fog machine...



How long should it continue to smoke afterwards? I took mine for a run and it smoked a decent amount, but now it still smoking a little at idle. Im letting it run right now for about 20 minutes to see if it stops
 
The more carbon and contaminents you have on the inside of your engine....the more smoke you will have... If it's not that bad..You have a well maintained engine..Congrats!
 
Well, add me to the list of satisfied "seafoam" users. I happened to be tuning my motor after a long storage and decided to do a leakdown test on my 112,000 mile motor just to see what was going on. Results were: 96%, 97%, 85%, 98%. A value of 15% leakage is considered the service limit for an engine rebuild and I wasn't looking forward to tearing the motor down.

I then ran Seafoam thru the PCV hose connection and the leakdown results remained pretty much the same. I next did a compression test and came up with 170 psi, 170 psi, 161 psi, 170 psi. When I was doing the compression test I noticed that #3 & #4 cylinders had fairly wet plugs from the seafoam treatment but cylinders #1 & #2 were bone dry. Finally, I redid the seafoam treatment thru the vacuum fitting on the intake manifold where the fuel pressure requlator taps into.

This strategy paid off as previously I was still getting some loud valve ticking even after 2-3 seafoam treatments which had me puzzled. Well, I redid the compression test and came up with: 170 psi, 172 psi, 172 psi, 172 psi. Leakdown tests came out to: 99%, 98%, 96%, 99%. Now, this is a 112,000 mile bone stock motor thats never been taken apart which I run 20 psi daily on. I attribute the low leakage rates to running synthetic oil for most of the cars life.

I can't say I noticed a difference in power but ALL valve tick/lifter tick is gone and my knock light doesn't activate anymore. One really weird thing is that my 3" exhaust system sounds a lot quieter too. The amount of smoke that came out of the car during the seafoam treatment on the cylinders that weren't cleaned the first time around was insane. I had neighbors coming by sitting on the sidewalk wondering whether my car was on fire.

I've done the "MCCC" thing in the past but previously could never get to that stubborn #2 cylinder due to using the PCV hose. Moral of the story is use a vacuum fitting that is centrally located on the plenum like the brake booster fitting or fuel pressure regulator vacuum fitting.
 
Yep... it's great stuff. As you saw, it usually frees up sticking rings and valves if the motor has set a while, if they aren't in too bad a shape.

The first time I ran it through mine, it was late at night and there was a car following me fairly close...maybe 40-50 feet back. When I gassed it, his headlights completely disappeared... gone... nadda... LOL
 
How are you running 20 pounds on a bone stock bottom end?

Huh? The same way every other 4g63 does this, as the stock bottom end is good for 20 psi easily. The only issue after that on the long block is the head can lift at 25+ psi.

You must of stumbled out the 420a forum. ROFL
 
now...the obvious answer to my soon to be asked question is the beach. But where do you get seafoam? and 20psi on a stock block is cake. even more for a 1g.
 
now...the obvious answer to my soon to be asked question is the beach. But where do you get seafoam? and 20psi on a stock block is cake. even more for a 1g.

You can get seamfoam at just about any automotive parts center. (Autozone, Oreilly, Advance, Kragen) It is a very dinky looking white can that says "Seafoam" on it. It's not actual seafoam LOL It usually lurks in the fuel injector cleaner area, if unsure just ask one of the salespeople. They will usually know right off :thumb:
 
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