OK. I see the block connection better in:
http://www.brit.ca/~tboicey/midget/pics/midget_overdrive_day_two_10.jpg
THat is definitely a drain hole, not only on my old engine, but on the new
engine, and the three engines he had at the shop.
Mike
Trevor Boicey <tboicey@brit.ca> wrote:
> mgraziano@mindspring.com wrote:
>
> OK. From memory.
>
> There are two "T"s in the system behond the engine. One on the intake
> manifold (built in) and one built into the pipe that runs from the water
> pump housing straight back under the exhaust manifold. I saw both on your
>pictures.
Indeed, and I have figured it out that I need a third, which I also
have
in my pictures.
> I saw no block connection other than the lead back into the waterpump
> housing. I think the block gets cooled on a different leg of the coolant
> system. Where is this block connection you have?
The block is cooled seperately by the big hoses up front, but
this connection seems to be used to "dump" water from the
rear engine area. Perhaps there is a strong pull there
that helps heater flow?
Ok, so based on your email and some serious thought I think
I have it figured out.
Here's the picture I took before I took it apart, and I'm
putting it back almost the same:
http://www.brit.ca/~tboicey/midget/pics/midget_pulling_engine_1.jpg
I didn't realize until last night but the ZS manifold also
has a built in tee, it's just a different geometry than
the SU one so it didn't show as obviously.
The hose flow seems to be:
- Manifold outlet TOP connection goes into water switch. This
is the END connection on a stock SU, in the pic it's missing.
- Manifold bottom connection goes to under-manifold-pipe SIDE
connection. In the pic this one is missing too but the pipe
is still there and aimed roughly at the camera.
- Under-pipe END connection goes to heater top entry.
- Heater bottom entry goes to the switch's other outlet, but
it does this through a Tee fitting.
- The tee fitting branches off a 3/4 inch pipe that goes
into the block fitting.
Perhaps on your car the block fitting is blocked off and
serves as a drain only? It's basically straight under the
rear-most exhaust port, it's hooked up in the picture.
--
Trevor Boicey, P. Eng.
Ottawa, Canada, tboicey@brit.ca
ICQ #17432933 http://www.brit.ca/~tboicey/
"Let me handle this, I speak Yokel..." - Duckman
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