[T3] Irregular Idling...again...Update

[Jim Adney]

On 15 Nov 2012 at 11:55, J. Jonik wrote:

> ----   No, there are no hoses, or closed-off places for hoses, coming from the heads.

So those heads have been replaced, with the early style heads.

> The engine that I recently removed from my 71 was a 72 engine.  
> The engine I put in was from my 73 parts car. I kept the
> distributor that was in the 72 engine.... but I may have long ago
> salvaged that one from the 73 anyway. With so many years of
> trading parts, I guess I don't know which engine block is from what
> year car. 

> ---  Suction test says that the advance is working.   What are
> differences among 71, 72 and 73 distributors? 

There are 6 different distributors for those 3 years. The difference 
is only clear if you look at the dist letter suffix.

71: MT is AC, AT is AD

72: MT is AE, AT is AF (both of these have vacuum retard in addition 
to vacuum advance)

73: MT is AG, AT is AH

> --- I have timing set for top dead center.  But, one thing I tried was
> to loosen distributor timing set nut and to slowly rotate distributor
> this way and that to see if I'd magically find the right setting that
> would make the engine idle properly.   That trick didn't show anything
> useful. 

The timing marks on the '73 engine are different. TDC is the 2nd mark 
from left on '72-3 engines.

'68-71 looks like  |    | | |, where leftmost is TDC

'72-3 looks like   |   |   | |, where TDC is 2nd from left

> --- Valve cover gaskets seem ok.   No oil leakage. 

And no air leakage?

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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