View Full Version : TVIS Butterfly valves?

02-12-2011, 06:10 AM
So the engine I got at PAP today is missing one of the butterfly valves on the tvis..., WTF. What do I do?

02-12-2011, 06:25 AM
Look for another at PAP.

Dealership cant get them that i know of.

02-12-2011, 06:32 AM
LAAAAMMMME. Ima go see my uncle tomorrow. he has a machine shop where he builds drag bikes, maybe he can make a valve for me.

02-12-2011, 06:34 AM
I cant wait to get the head off and see where the valve went... Ima asuming it broke free and went into the cylinder.

02-12-2011, 10:44 PM
Maybe remove all of them, or get one custom made? Theoretically the intake should be able to flow more air that way.
By the way what is PAP?

02-12-2011, 10:56 PM
Toyota put those in there for a reason. Removing them on an otherwise stock 3SGE will result in less power down low and nothing gained up top.

I wonder if you can use the TVIS off a 3SGTE. Im sure theres plenty of people on mr2oc who have gotten rid of theirs in favor of larger manifolds, etc.

02-12-2011, 11:05 PM
I have 2 extra TVIS assemblies, one 3SGE and one 3SGTE. They are the same except for the bracket underneath which various things are mounted on. If you want one, let me know and you can have it for the cost of shipping.

02-12-2011, 11:06 PM

03-09-2011, 01:57 AM
Heh, so I havent really thought much about this since. I finally got around to head work tonight. I spent the past few hours pulling all the valves and seals. Then I flip it over and take a wire wheel
to the cumbustion chamber. Lo and behold cyl #2 has some odd texture to it, kinda looks like a 3 year old welded in it. I donno how it didnt mess up the valves, but something has deffinatly been melted all over the dome and its the same one thats missing a tvis butterfly. WTF?! I took a chisle and hammer to it and its solid, not gonna flake off.

Here it is. There is no machined look to it, just lumpy melty looking
http://www.celicatech.com/gallery/files/4/6/9/4/downsize_207494.jpg (http://www.celicatech.com/gallery/showimage.php?i=18889)

Here is a good one for comparision.
http://www.celicatech.com/gallery/files/4/6/9/4/0308112034a_577088.jpg (http://www.celicatech.com/gallery/showimage.php?i=18887)

03-09-2011, 05:30 PM
Pics are useless. :P

You probably need a new head.
You may be able to grind it away, but you'll have to be VERY careful you don't damage the aluminum surface, and that you keep the same shape.

03-09-2011, 05:31 PM
Yeah, new head is a must. Im not gonna try to rig it. I dont have a fancy camera, so phone pics will have to do lol