At 12:08 PM 7/23/98 -0400, Don Gibbons wrote:
>There is no problem with the U. If you just plug them then you get a small
>length of dead coolant that never circulates.
>
>A U will not be completely dead coolant, it may circulate somewhat.
>
>But in either case it will be a good place for air to collect and may make
>bleeding more difficult.
>
Actually there is a potential problem when you bypass the rear heater core.
This allows hot coolant to bypass the radiator and go right back to the
engine. The valve assembly on the heater core has a restrictor that limits
the flow through the core. If you remove the heater core and just connect
the two hoses, you will have no restrictor and no valve. While I've never
heard of anything terrible happening if you do this, I think that plugging
the two hoses is the better way to go if you want to remove the rear heater
core.

MM