BISS screw ejected?

[yeti]

So my car was running like i giant boost leak and i could hear it so i perform the blt and my biss screw is gone!

Ive already replaced it, just wondering if anybody else's has done this i was boosting 34 psi the other day so that probably ejected it.

 

[Brunoboy]

34 psi on what turbo?

 

[yeti]

shhhh it was a spike that was immediately fixed








ebay 16G

 

[Brunoboy]

i dont think it was the turbo, do you still have the rubber cap over it?

 

[yeti]

no the caps been gone since i got the car i out a new screw and o ring in though..

im pretty sure the engine vibrated the screw out then the pressure just shot it out

 

[Leon_R]

This is quite common. What happens is o-ring gets hard and stops serving as thread locker (its second function, after actual sealing). You used to have to buy another TB to get the screw, so you had to pay $200+ for a used TB. Screws used to sell for $50-75 (if you could find a used one). Eventually people found a $4 plastic replacement.

That probably means that it was leaking for a while.

 

[Brunoboy]

junkyard tb or extremepsi and others have the plastic screw with o-ring, in my opinion the plastic one is not worth it.

 

[misfitsnemesis]

Go to mitsu and order you a biss screws its like $1 and change after taxs maybe 2 bucks now if that. Then go to lowes and i belive it a number #5 o-ring.


Here the vfaq
click

 

[yeti]

I have a plastic one in their now with a tiny bit of RTV on the threads, Its running fine now the part at Mitsubishi is $1 and its the metal one thanks for that info ill be getting that asap.

Do the plastic one's leak?

 

[kama1]

mine used to always land on top of the tranny.
got a new o ring and rubber cap.

 

I've had several leak, and while trying to unscrew them they tend to freeze in..metal ones are the way to go.

 

[Drew84]

If you can find a metal one, Mitsu superceeded it to a plastic part. I've had no issues with mine and a new o-ring. My metal one went missing on the highway too. Plus the plastic does not corrode and stick in the TB.

 

[Okayplayer]

I got mine from here: click
You get the nice little cap too. It's all authentic Mitsu stuff too.

 

[grocery_getter]

Get a small drill bit, drill across thru the top of the cylinder and put in a cotter pin. That will prevent the BISS screw from ejecting itself completely.