cuda

I want to use seafoam to clean my 99 Rx300, but I can't find vacuum line.

Lexmex

And a very similar Toyota engine, too. http://www.youtube.com/watch?v=SZf4WXwVL_E

In the RX300, you want to shoot it through the PCV valve area. There is a hose in a location similar to what this guy shows on the left side as show in my photo below (what I am holding in my hand you want to pull it off the PCV valve below).

cuda

Thanks so much, I will try this weekend.

edbro

Lexmex,
Just so I am absolutely clear, you pull the hose from the end that is at the bottom of the picture under that round part, not the end that is at the top of the picture?

Lexmex

You pull it from this point on the PCV valve. You then need to attach a funnel on this end to it to pour the Seafoam (or whatever else) in.

edbro

Thank you. If that's a vacuum line won't it suck up the Seafoam instead of having to pour it in?

Lexmex

When you pull this hose off, the engine can stutter a little, so pouring it in this way will help it take in the seafoam.

tcheung87

Hey Lexmex, how hard is it to pull off the PCV valve? I gave it some good tugs today and it wouldn't budge, I have the seafoam ready =)

Lexmex

I should apologize as I have a hunch why. The 2001-03 RX300s have a different PCV valve setup that is a metal/brass. There was a photo a while back that I could not find. In both cases, all you have to do is get the hose off of the PCV valve, the PCV valve can stay put.

LiqrSicc

hey guys, sorry, I'm completely clueless when it comes to this. What does the seafoam do and what is the vacuum line for?

Lexmex

Well the lines I am referring to are ones that remove the crankcase gases and shoot them back into the combustion cycle.

As a result of this process, your intake manifold can get yucky and disgusting with oily crud.

Seafoam is a product that can help remove this kind of stuff like carb cleaner, though more efficient. Seafoam has some other good properties in the oil and gas, but the use through the intake mainfold is the main use of it.