Hi All-
I finally got some time yesterday and put Seafoam into my PCV valve to clean the injectors. I also replaced the PCV valve. My car seems to have more power! Please feel free to commment or ask questions!

 

I use Seaform in all my engines, great results especially for stored engines, mower, bike and motorhome. I've heard and read you can use it in a vacuum line but never tried it. Did your SC smoke like it says? Glad it worked .

 

Yes they was a big cloud of white smoke. As far as I understand, it is just water vapors being pushed out. I also read to add the seafoam really slowly otherwise there could be hydro lock. I used a turkey baster to add it slowly. Last time I had this service done at Jiffy Lube it was $120. The same thing costs you $8 DIY :-)

 

I always use Seafoam as well, and I always go through a vacuum line.

I generally use the brake booster line, and what I do is slowly stick the hose into the can, and slowly work it in.

 

How much do you put in? I heard that less is better than more, so I was conservative and used about 1/4 or 1/5 of the can.

 

I divide it into thirds

1/3 oil (I do this right before an oil change, so I drive about a day with it)
1/3 vacuum
1/3 gasoline

If the car has been sitting for awhile, I'll put a whole can via vacuum.

 

I've used Seafoam for years in my cars and trucks, and swear by the stuff. I went to do my new-to-me 2008 SC430 a week or so ago, and for the life of me, I can't seem to find the brake booster line (I always used the "sucking it up through the brake-booster" method on my previous cars & it worked well). I looked all over on the firewall (where they are usually located), and around the master cylinder, but no joy.

Can anyone give me a clue where the Brake Booster line is on the SC430? I ended up just dumping about 1/3 of a can in the gas, but I still want to do it right...
Thanks in advance.

 

I have always dumped a can into the gas tank every 5k miles. I am too chicken to do the brake booster line!

 

In fact all my Lexus get a 16oz Seafoam every 5k miles.

 

I used a different vacuum, since I also could not find it lol. I pulled off the cover and found a small vacuum line off the intake manifold.