Replacing EGBV Piping

[Angarak]

Hi,

 

Having investigated the source of my boost leak I've discovered that one of the pipes on the EGBV actuator has rotted off. (its the left of the 2 pipes in the pic below)

 

 

Would I have to remove the turbo's to get decent access to this to refit a piece of new pipe or is it not that drastic of a job?

 

Cheers

 

PS: Great Guide on the Sequential System Mawby

[Ian C]

I have actually managed to change that same hose without removing the turbos. You have to disconnect almost every other hose from the big metal spidery collection of pipes, unbolt it from the top of the turbos and move it up and out of the way while messing about with long nose pliers down the back of the turbo. A nightmare job either way.

 

Yes that's a lovely guide to the sequential system Mawby

 

-Ian

[Angarak]

Cheers Ian,

 

OK next question:

 

Is this a special pipe that I need to get from Toyota, or could I go buy some silicon hose and get away with that?

 

I ask as its a bent pipe, and I'd have thought that bending a piece of silicon hose would narrow the pipe at the bend. Since its been a bit of pain in the arse to get to, I intend to replace both pipes whilst I have the chance.

 

If it is a Toyota part, does anyone know the part numbers for both pipes?...and would they be different from UK spec (as mine is J-Spec)

 

Picture of said pipe in pic below

 

Cheers

Simon

[Steviekid]

Cheers Ian,

Is this a special pipe that I need to get from Toyota, or could I go buy some silicon hose and get away with that?

 

Silicone hose should be fine. The actuator is working on pressure not air flow as such, so slight bending of the hose is irrelevant as long as it's not kinked too much. Silicone hoses are a bit "slippier" though so make sure they're on tight. I've got silicone hoses on the Wastgate, IACV and EGCV actuators with no probs.

[JohnA]

I've had to delve into that territory while experimenting with increasing low-rev boost.

Once the top hoses are out of the way, you can feel your way around the back of the EBV actuator. Long nose pliers are helpful, as well as patience.

If one of the hoses is rotten, then probably the other one is not much better, so you'd better pull them both off and replace them with new ones.

 

I chose to block off the metal hose coming from the pressure tank, and have that actuator fill in from another boost source, the one top of the engine where the metal "Y" sits as the two compressors merge their output.

Fitting a manual boost controller there allows you to pressurise the EBV actuator later, thereby allowing turbo#1 to boost higher before prespool starts for #2.

[Angarak]

Thanks StevieKid & JohnA for your input.

 

JohnA, my car came with a boost controller already installed, and several bits of plumbing are different from stock...I think I already have a non-stock piece of plumbing going to my pressure tank. The next thing on my list of "to do's" is to learn why its plumbed in the way it is (you may see me start another thread in a couple of days lol) .

 

 

Cheers

Simon