No heat

[Brett Dikeman]

At 11:13 PM -0500 12/13/03, McCohens at aol.com wrote:
>My 5000 TQ has very little warm air.  I disconnected the temp system and have
>the flaps set to defrost only, coolant valve fully open.  The A/C is unhooked
>also.  I blew the heater core out today, thought it might be clogged but not
>so.  The hoses to and from the heater core are warm.

What about the top radiator hose?  It should be hot enough that you 
can't hold on to it, as should the heater hoses.  What's the temp 
gauge reading?  How old is the thermostat?  Have you flushed the 
system?  Followed the procedure to top off the system(cap off the 
reservoir, run the engine, heater set to max, until the fan comes on, 
if I remember correctly.)

>   If the fan is off, once
>turned on it puts out warm air for about 30 seconds, then the air is barely
>warm. Could a bad water pump cause this?

Bad water pumps on the I5 eat timing belts, which is why usually 
people change them every t-belt change(along with the idler, the 
seals, etc).  You'd know if it was bad.

>   I was wondering if the impellers are
>really worn maybe they don't move much water.

The impellers can't wear, they're solid cast bronze(iron?  I forget, 
I think it varies depending on the OEM).

>   Also thinking about hot wiring the
>turbo water pump, which terminal would be hot to make the pump work in the
>correct direction.

The turbo water pump should not be run during engine operation.  In 
some engines(the 20vt for example) the pump actually pumps backwards 
compared to normal system flow.

Brett
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