repairmatt

I'm not sure what this is, it appears to have had a vacuum line running to it at one point, but doesn't any longer. I am wondering if this is needed for proper function or not? The car seems to run fine, but I thought I'd better check.

Hayk

iTrader: (1)

Could you zoom out a little bit to give more of a reference for this object?

repairmatt

Certainly!

Mythotical

That is a TVS (thermal vacuum switch) for something, I'll look at mine later and tell you what it's for.

By the way that heater hose you are using for your P.V.V. will not last long, you should use 1/2" fuel vapor hose.

repairmatt

Ah ha, that's what it is. I'm guessing it's not critical, as the car has been running great and the last trip returned 25MPG, and that was with the AC running for every trip. The heater hose was not installed by me, the mechanic who worked on the car installed it as they damaged the original. Should I replace it immediately, or can it wait awhile?

Edit: Also, where are the vacuum lines that go to the switch?

Mythotical

The heater hose can wait. I have a 98 and it has no TVS there so I have no idea what it goes to. However you should still have a vacuum diagram sticker under your hood somewhere. It should give you an idea or two. If not, look one up. just type in 199* es300 vacuum diagram.

By the way, what year is your es, it looks like it's pre 96

Mythotical

I think that may be the BVSV for your charcoal canister to purge. That would be something important. It helps with emissions and with keeping water vapor from condensing in your fuel tank.

repairmatt

It's a 1994, 1MZ-FE engine. A BVSV sounds about right, problem is, I have no idea where the vacuum lines running to it are. I'll see if I can find the diagram under the hood, if not, I'll look it up!

repairmatt

Well, it is indeed the BVSV, and the vacuum lines were re-routed so that it bypasses the valve completely. Comparing the diagram to what is there, it looks like there is an entire line that's missing, so I'll have to get some tubing to replace it along with the valve.

Mythotical

You can actually just take a roll pin and glue it into the busted nipple to create a new nipple.

repairmatt

That would be nice, as it looks like it would be a pain to get out. Is there a thread where this has been done before? Just so I have a reference.

Mythotical

I can find no post about how to repair that so, I'll explain.

Step one, find a roll pin that will fit into the hole.
Step two, get some CA glue (5min epoxy)
Step Three, test fit the pin to figure out how far you can push it in without interfering with the mechanical parts within the BVSV. Using a marker, make a mark on the pin so that you will know where to set it. Also mark the outer end so you know which way it goes. Now mix up a little ca and use a brush or a stick to apply a little glue on the pin. Be sure to put some glue into the seam that runs the length of the pin in order to seal it and try not to get any glue in the ends. Finally slide the pin into the broken nipple all the way up to your mark. Once inserted, apply a small amount of glue to the edge of the nipple where it meets the roll pin and be sure to take it up the side and cover to a little ways over the broken end of the nipple. Allow an hour or so to cure and go ahead with the vacuum line. Pat yourself on the back and crack open an iced cold beer, you've earned it!