BOV damaged by welding heat? *asap please*

[xveganxcowboyx]

In an attempt to seal up the horrible welds on my intercooler piping I took each piece off and pressure tested it, welding where it leaked. One of the leaks was where I attached the BOV flange. (obviously the valve was on for testing) I was short on time and did not remove the BOV to do the welding. The poor thing was exposed to a lot of heat. Now when pressure testing my system the BOV leaks even at low psi. I crushed it a small amount to no avail.

So the question is this: Are there any internal components that would be damaged by high heat (plastic, rubber, weak spring, etc...)? Will crushing help or should I just buy a new one.

The urgent part to this equation is several people are counting on me driving for a summer vacation tomorrow morning.

 

[PieEyedPiper]

In an attempt to seal up the horrible welds on my intercooler piping I took each piece off and pressure tested it, welding where it leaked. One of the leaks was where I attached the BOV flange. (obviously the valve was on for testing) I was short on time and did not remove the BOV to do the welding. The poor thing was exposed to a lot of heat. Now when pressure testing my system the BOV leaks even at low psi. I crushed it a small amount to no avail.

So the question is this: Are there any internal components that would be damaged by high heat (plastic, rubber, weak spring, etc...)? Will crushing help or should I just buy a new one.

The urgent part to this equation is several people are counting on me driving for a summer vacation tomorrow morning.

It plausible that the extreme heat your bov was subjected to has ended its life as a working part of your car.

I haven't opened mine up before, but I've looked inside and I found no rubber gromets or seals, only metal on metal. I damaged my seal iirepairabley with a screwdriver so I had to purchase a new BOV.
My suggestion to you is that you will not likely find any serviceable parts inside and you are looking at a new BOV.
www.ebay.com

 

[greengoblin]

Well if I know the greddy has a Diaphram and an o-ring on the valve piston. It sound like you melted some thing to me.

 

[Defiant]

Yes, that much heat will destroy a BOV. Probably starting with the diaphragm, possibly even into the spring (which wouldn't matter once the diaphragm gave out).

 

[xveganxcowboyx]

Looks like it needs replacing then. It still seems to operate (finally got everything working appropriately) but I am obviously losing pressure. I usually run about 17 psi. It's only hitting 15-16 and drops to 12 by redline in 3rd. Oh well, it's got a nice flutter sound to it

Thanks guys. I'll unfortunately have to wait until I get back to get a new one, but it's gone longer with worse boost leaks so I suppose It'll survive.

 

[destrux]

You sure you didnt just fry the gasket between the BOV and the flange? That will fry alot faster than the diaphragm inside, and much much easier than the spring would lose it's "spring". The actual valve in the BOV is metal to metal, so that wouldnt burn out, but it might warp if you got it really hot (but even that I doubt).

If the gasket melts/burns it can also clog the bleed hole in the BOV, since the space in there is so tight to begin with.

 

[Defiant]

Thanks for getting to his ASAP a week and a half later.