MC/MB/1B Inlet Manifold running change?

[quk@isham-research.demon.co.uk (Phil Payne)]

I've noticed that the MB and 1B engines I see are fitted with two
different types of inlet manifold.  In the earlier ones, it's just
an inlet manifold.  In the later ones, there is a kind of catching
tray cast into the upper side where it attaches to the block.

Last weekend was the first chance I had to examine one of these
later ones close up.  It is indeed a tray, and there is a drain
with pipe attached at the rear.  Of course, the drain was blocked ...

We tested it by undoing #5 injector.  Sure enough, leaked fuel is
carried relatively safely past the exhaust and vented under the car.
With _my_ manifold, it would pour onto the exhaust.

I can't find any documentation on this change.  Anyone know if the
part number was retained?

I can get pretty close to when it was done.  Ur-quattro J637
doesn't have it, and J734 does.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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