"mickey" wrote in
oups.com:

part of my problem is that the wtaer heater hoses are smaller than the
engine hoses, so obviously I need something to give there, thus the
bypass. Here's a diagram: (best viewed with a fixed-width font)

WATER HEATER
: :
: :
engine......____L___/___L____......heat exchanger (to engine)

Of course, the heat exchanger is mounted on the engine, but it's hard
to loop with these text diagrams Here ... and : are hoses, _L_ is
a T and _/_ is a valve. I have no valves between the _L_ and the heat
exchanger.


Are you sure about that? Water hoses and passages are BIG, not the tiny
hoses to the water heater. The heat exchanger is directly on the engine on
the Perkins looks hooked directly to the block passages. I don't think you
have to put a loop hose on it if you don't have a water heater....

That would seem stupid, to me. Water heater hoses should be like car
heater hoses. The engine outlet to the water heater comes from the high-
side of the thermostat, which pressurizes the water to the water heater.
The low side of the water heater return should go into the suction side of
the heat exchanger back into the engine, giving you hot water BEFORE the
thermostat opens.

I don't really remember. I'll look next time I'm in the bilge. I now have
quite a list to look at...(c;

--
Larry