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> Is seafoam safe?
post Mar 31, 2012 - 3:19 PM
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ILoveMySilly97



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I've heard that seafoam is a really good and easy way to clean the car up a bit. When I go look at videos and ask people they tell me pour it into the Oil crank case, Brake booster, and fuel tank. It sounds stupid to pour something that doesn't belong into the brake booster and espescially the crank case. I just want to know if anyone has ever used it and does it really work or is it just stupid.


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post Mar 31, 2012 - 4:20 PM
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Special_Edy



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Ive got a special tool that screws into the seafoam bottle and limits the flow of seafoam into the vacuum line but I cant find it ATM

Anyways, seafoam works great in the gastank(its the elixer of the automotive gods!), but my favorite use for it is through the intake manifold.

What you want to do is get the engine warmed up to operating temp, and with the engine off disconnect the pcv valve. Find a peice of hose that will fit where the pcv valve hose goes into the throttle body, or better yet use the existing pcv hose with the pcv valve removed and insert a smaller diameter hose into the PCV hose. Whichever way you do it, you MUST remember that fluids are non compressable and the vacuum line will draw seafoam in at an alarming rate(like the whole bottle in 10-20 seconds. YOU MUST NOT allow it to flow into the intake this fast, as it can hydrolock the engine and do serious damage(the piston will reach TDC and the liquid wont compress, breaking the head, rods, pistons whatever).
Set your can of seafoam opened somewhere in the engine compartment where you can reach the hose to it(you will need one hand for the hose and one for the throttle, so no extra hands to hold the bottle)

So, with your extra long pcv valve hose connected to the throttlebody(dont put it into the seafoam yet), start the engine. The idle may soar WAY up because of the vacuum leak you just purposefully connected, but dont worry.
Now take the your pcv Hose and kink/bend it in half to cut off airflow through it.
Next you want to disconnect the IDLE UP vaccum line from the throttle body (of the four small hoses on top of the throttle body it is the closest one to the front of the vehicle and the ONLY one that travels towards the drivers side of the car, not the passenger side) the engine will now rev to 2000-2200 rpm on its own
Insert the hose into the can of seafoam(all the way to the bottom of the can) and SLOWLY/Carefully unkink the hose so that just a TINY bit of seafoam can flow through. You may need to use your free hand to open the throttle enough to keep the engine from stalling, but DO NOT UNDER ANY CIRCUMSTANCE FLOOD THE ENGINE
You will start to see a HUGE cloud of white smoke pouring out of your exhaust, but this is good. All the crap in your intake, valves, cylinder heads, exhaust, Catalytic converter and 02 sensor is getting blasted out by the seafoam.
When the can is finally empty( I would say 2 or more minutes from full to empty is proper), you should reinstall the IDLE UP vacuum line to bring the idle rpm back to normal, and reconnect the pcv valve and normal pcv valve hose(I would suggest leaving the engine running while doing this).
Finally, go take your car for a ride to burn off the seafoam. It may take as much as 30 minutes of driving for it to stop smoking, so dont be worried. And try to enjoy the looks from people as you pass by with a James Bond smoke screen pouring out of your exhaust.


Ok and dont let this scare you, its very easy to do this but obviously you must limit the amount of seafoam entering the intake to a small trickle through whatever means.

As for putting Seafoam into the crankcase, I havent tried it before. I have put Seafoam Transmission clean into my Lincoln Towncar before changing the Transmission fluid/filter, and I must say it did wonders. After a few miles (I drove 20 before I flushed the trans.) the car was shifting significantly smoother.
The only advice I can offer for putting seafoam into the crankcase is that nothing you put into your crankcase other than oil is good for your engine.
I would run the engine very gently for a short period with the seafoam in the oil, then immediately change the oil and filter(i imagine it will loosen alot of crude and thin your oil, good for cleaning but bad for driving)

This post has been edited by Special_Edy: Mar 31, 2012 - 4:25 PM

Posts in this topic
- ILoveMySilly97   Is seafoam safe?   Mar 31, 2012 - 3:19 PM
- - Special_Edy   Ive got a special tool that screws into the seafoa...   Mar 31, 2012 - 4:20 PM
- - njccmd2002   environmentally safe   Mar 31, 2012 - 4:58 PM
|- - 3WayStunna   QUOTE (njccmd2002 @ Mar 31, 2012 - 4...   Mar 31, 2012 - 5:43 PM
- - richee3   Your car will smoke quite a bit when you run Seafo...   Mar 31, 2012 - 7:00 PM
- - kurt95gt   I beleave theres instructions on the can Ive ran ...   Mar 31, 2012 - 7:21 PM
- - Galcobar   Never heard of putting it in the brake booster. T...   Apr 1, 2012 - 9:15 PM
- - Box   I've used it before, and will soon on the Celi...   Apr 1, 2012 - 9:53 PM
- - RabidTRD   I've always done the 1/3 in the oil, 1/3 in th...   Apr 1, 2012 - 11:36 PM
- - Smaay   it dont go in the brake booster, you are just usin...   Apr 2, 2012 - 11:56 AM
- - rave2n   Seafoam..makes you think it helps, til it clogs an...   Apr 2, 2012 - 12:35 PM
- - Ted95   if your motor has high miles it may not be the bes...   Apr 2, 2012 - 1:59 PM
|- - RabidTRD   QUOTE (Ted95 @ Apr 2, 2012 - 2:59 PM...   Apr 4, 2012 - 1:36 PM
- - ILoveMySilly97   Thanks everyone. I've always had doubts in thi...   Apr 2, 2012 - 2:31 PM
- - nics   Just did mine last week. 237k engine.   Apr 2, 2012 - 4:42 PM
- - mandrek   have had GREAT results from using seafoam in all 3...   Apr 2, 2012 - 7:59 PM
- - ricochet1490   From a 6gc member (notice sticker in window) http...   Apr 6, 2012 - 6:50 PM
- - zfjohnson07   its safe, heres my video i did http://www.youtube...   Apr 6, 2012 - 9:06 PM
- - CruznKnFuzn   Thank god I found this thread haha I'm about t...   Dec 9, 2015 - 6:06 PM
- - VavAlephVav   I learned the hard way in a different car that sea...   Dec 13, 2015 - 6:40 PM


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