What is the best way to seafoam?

Joined
Jul 9, 2019
Messages
9
Location
Nashville, TN
I’ve read that if you put it in a bowl and suck it through the PCV hose, but I would like to be certain. Does anyone have a picture of the exact hose that you did it on and saw benefits?
 
Joined
Jun 29, 2017
Messages
278
Location
Longmeadow MA
Use the vacuum line right off your brake booster.
Make sure to have someone on the gas pedal to keep your RPMs up around 2-2.5k rpm
Dip the tube onto the bowl of sea foam and watch white smoke appear out tail pipe.
I would dip the tube, then pull it out, then put it back in a few times while doing it so the engine doesn’t stall.

Did it help? No idea really. Hard to determine performance increases....i know it didn’t hurt anything

C3D6FA74-8CB0-4F1A-91F1-1E7A8D59136B.jpeg
 
Joined
Feb 28, 2017
Messages
421
Location
portland oregon
It’s snake oil aimed at people with limited mechanical knowledge.
i am of the same mind.

i ran several cans of it through full tanks of gas. on a long road trip last summer in the hopes of clearing out carbon buildup that i assumed was contributing to pinging on hotter days and while climbing slight grades.

the only thing seafoam did was make my oil extremely thin. when i changed it - it poured out like water.

nothing worked to solve my pinging except running premium fuel and a good tune up.
 
Last edited:
Joined
Apr 23, 2005
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2,677
Location
Oregon
I'm in the snake oil camp. But you do get a nice cloud of thick smoke out of the exhaust, so it has that going for it.
 

Seth_O

 
Joined
Apr 6, 2007
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Under the hood
I've used it, the cloud of smoke was very satisfying (not the word my neighbors used.) I saw zero difference afterwards.

There are some videos on YouTube of before/during/after with seafoam and other products. It's worth a few mins of your time to watch them.
 

OSS

Joined
Jun 30, 2017
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1,879
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?
I've never used it, but I know for 100% certain that just plain water carefully sucked into the intake when the engine is nice & hot will steam clean the intake manifold, the combustion chambers and the tops of the pistons so they're all sparkly clean.
Although I could never feel the difference, steam cleaning definitely cleaned stuff up.

I think if a water steam clean was done right before every oil change, the combustion chamber would stay squeaky clean.
I never bothered, but everything points to that being the case
 
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