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Re: [T3] Engine ID?


On 3 Sep 2004 at 23:22, Dave Pallo wrote:

> I do have the 5 terminals on my throttle switch.....
> and the dual vacuum advance....however only the vacuum line facing the 
> distributor cap is hooked up to the intake....the other vacuum line is not 
> hooked up because the plastic fitting is broken clean off where it comes 
> out of the metal vacuum advance.......

Sounds like your engine is built up as a '72, so you need to do the '72 tuneup 
proceedures. Note that the '72 tuneup proceedure is unique and ONLY the Bantley 
manual gives the corrrect instructions for this. You really must have a Bentley 
manual if you want to own this car. I have one of these for sale right now if 
you're interested.

The fitting that is broken off is your vacuum advance port. That should connect 
to a port on the upper left of the intake air distributor. There's usually a 
right angle fitting there for the hose. It's just after the big rubber elbow at 
about 11 O'clock.

It might be possible to fix the broken plastic nipple by soldering in a metal 
one from an old dead vacuum advance donor. Normally I wouldn't bother with 
this, but new VAs for this year cost about $100 and are hard to find. I may 
have one if you need it. You would want to verify that both parts are actually 
working before you bother.

To verify that the advance and retard units are working, you just have to see 
if each side will still hold vacuum. On these dual vacuum units, the advance 
side is usually fine, but the retard side is often broken.

A working vacuum advance will give you better gas mileage.

The retard hose should go to a fitting on the intake air distributor that 
sticks straight out to the left, at about 8 O'clock and an inch or so farther 
forward.

I advise you not to disassemble this vacuum can from the distributor if it is 
working now. I have a LOT of diaphram failures with these when they are 
disturbed and, since they are so expensive to replace, I try to be REALLY 
careful with them.

If you want it fixed, your best option would probably be to let me do it as 
part of a general distributor overhaul. I should be able to find a replacement 
vacuum nipple here if that's what you need.

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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