DIY: SC300/400 Seafoam Guide! With Pictures
 

Hello CL, I'm here because I planned to Seafoam my car. I hunted around the forums and couldn't find a thread with pictures of a step to step guide on how to properly Seafoam my vehicle. I figured I could help out the community by making a DIY thread myself.

Let's get started!

Required Tools/Products:

• One can of Seafoam Treatment
• Three Disposable cups
• One funnel that is fairly narrow at the bottom
• Buddy to help you

Step 1) Buy your can of Seafoam, and plan on changing your oil ASAP after treatment.


Step 2) Drive your vehicle around, and get it to normal operating temperature.


Step 3) Pull your car into your driveway, NOT IN THE GARAGE and pop the hood


Attachment 498432


Step 4) Get three disposable cups and divide up the can of Seafoam evenly between the cups.


Attachment 498433


Step 5) Turn off your vehicle and locate the PCV hose, remove it and flip it pointing upward and add a funnel to it.


Attachment 498434


Step 6) Start the vehicle. With your friend helping you, SLOWLY pour 1 cup of the Seafoam into the funnel and have your friend give the car gas so it doesn't bog out.

Step 7) After your pour the cup through the PCV hose, put it back to how it was before you flipped it. Then shut the vehicle off.


Step 8) Open your gas tank and pour 1 cup of the Seafoam into the tank using a funnel
Attachment 498435


Step 9) Open your crank case oil cap and pour 1 cup into it using a funnel, and then put the cap back on.


Attachment 498436


Step 10) Wait a total of 5 minutes to let it soak in and do its job.


Step 11) Start the vehicle and let it idle and give it gas occasionally until the smoke stops coming out the exhaust.


Step 12) Either let it idle out completely, or take it for quick spin. It's entirely up to you, I took it for a spin with no failures, but this was only about a 2 minute joy ride down the street.

Very nice write up Thanks!

Pretty sure you're not supposed to drive it after you put it in the crankcase.. just idle..

Good write up man. Thank you. Here is one that OLT did awhile back. It does cover the general knowledge of do's and don'ts, but not a DIY like yours.

This also goes in the performance and maintenance section.

https://www.clublexus.com/forums/per...k-in-here.html

From comparing the steps of others here on CL, as well as reading the directions It seemed evident the best option was to drive around to insure the vehicle got all the particles that were removed from valves, etc out of your system entirely. (I drove for about 2 minutes)

Thank you all that have posted, and thanks again staff members here on CL for moving this to the correct section to better assist members.

If you have any questions, feel free to post.

Thanks for the updated write up. Great DIY :thumbup:
The only suggestion i would make is changing your plugs after doing this :thumbup:

This is another step that is to be highly considered. You can get some cheap ones from autozone for about 20$ and then just take them out once ur done, and save them for your next treatment.

Good write up. :thumbup: Interstate battery...:egads: :D

It came with my car! The previous owner had AAA called to him when his battery died and that's what they replaced it with.

Should I replace it with something else?

Is there a bad effect using an interstate battery?

Just jesting. I've had a couple and they weren't too good for me...

Well if I were to replace the battery, which I plan to do over the summer, What brand/model would you recommend?

I have to deal with some harsh climates here in PA so I would prefer it to have a little better action in the cold winters.

Kirkland Signature at Costco is an amazing battery and top rated by Consumer Reports. If you get any, try and get that brand. I just use the Wal-Marts 1 year warranty battery Everstart Maxx battery in my SC, but our Suburban is Kirkland and it works well. If you dont want to go cheap, Gel batteries are top.

Hmm, I just wondering because the interstate battery I believe has a very good warranty.

That's why I am hesitant to replace it.

I'm planning to do the treatment again to my vehicle!

This is some good stuff, and better on high mileage cars!

yup, seafoam is amazing.