Properly adjusted the throttle should not actually close off the flow. The
stop should be adjusted so that the plate wont jam shut in the bore. You
need to find out what is really wrong. Bad intake valves and worn guides can
also cause symptoms similar to vacuum leaks.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Michael McSwain
Sent: Sunday, April 19, 2015 11:37 PM
To: vanagon@GERRY.VANAGON.COM
Subject: JB Weld Throttle body repair question.

I was reading up on this because I have my throttle body out at the moment
and I was contemplating giving this a shot.  The TB butterfly plate from my
'84 is a little loose. The van runs ok so the little voice in my head says
don't poke the bear! But I want it to run better and I'm bored!

So the JB Weld idea, (I'm assuming folks have heard of this), is that you
are making that closed plate seal tight again, letting a little less air
through at idle. And in turn a little less vacuum pulling fumes from your
charcoal canister into the TB at idle.

Well, there is also a small hole in my butterfly plate.
My question is, would closing up that hole in the butterfly plate not
accomplish the same thing?  Restricting the flow just a bit. Hopefully back
close to the designed specs?

It just seemed like it would be a lot easier and the JB Weld idea makes me
nervous.  Obviously anything I put in that area would need to be super solid
as to avoid the possibility of it coming off and making it's way into my
engine!

Any thoughts? Is this even something worth contemplating at all or should I
know when to say when and buy a rebuilt TB!?

--
m.