legacycentral bbs

My bypass valve is already borked, since the little nub off the top apparently broke off a while ago. Some previous owner epoxied on a short metal tube so it would work. Anyways, that metal tube was coming out so I re-epoxied it the other day. I might have pushed it too far in, I think.

Today, as I was in 4th driving up a hill, the car would occasionally have a small jerk. This is the first time I've noticed this and it doesn't happen and slow speed.

If I did push in the metal tube too far into the bypass valve, what exactly would that (negatively) do? Any way to test if its still functional?

You could take the BOV off the car. Try to blow through it both ways. I don't think you should be able ot blow through it with nothing hooked to the tube. Then I suppose you could get a vaccum pump and pull a vaccum on the (now metal) tube. You should then be able to blow straight though it. When you release the vaccum it should go back to the original state.


Or you could just unplug the hose thats on the pass side of the BOV, temperarily plug the HOSE. Get in the car and get on the road. Hammer it to the floor to get well into boost and then shift. You should hear a big WHOOSH of air. Your engine will run supper rich when you shift gears while its venting to atmosphere. If the BOV is bad either it will be held open (the car will probably have a hard time accelerating with the BOV hose unppluged) or held close (you won't hear anything when you shift under heavy boost). Generally if the BOV is held closed it will make a whoop whoop sound when you shift under heavy boost (this is your turbo stopping dead in its tracks -BAD! - But it does sound cool).