How do you tell if an H2O pump is failing? (NAC)

[Joshua Van Tol]

Subarus use an unconventional heater circuit arrangement, if I remember
correctly. Might be worth pulling the t-stat out to check it. Water
pumps usually fail pretty spectacularly, and don't usually just stop
pumping as their only indication of failure. Usually they seize up, or
leak or do something else bad when they quit.

On Monday, March 3, 2003, at 11:55  AM, Henry A Harper III wrote:

> If the water pump were functional and thermostat were stuck closed, I
> would
> expect there to be lots of heat available to the heater core, contrary
> to
> symptom #1, as the heater core is normally on the "inside" of the
> thermostat-controlled coolant circuit. Sounds like dead water pump to
> me,
> FWIW.
>
> Henry
>
> On Monday, March 03, 2003 10:12 AM, TM [SMTP:t44tq at mindspring.com]
> wrote:
>> Failed thermostat stuck closed? I don't know if Subaru
>> t-stats have a goofy failure mode.
>>
>> Water pump is a possibility, but no coolant leakage at the pump?
>> No strange noises?
>>
>> Taka
>>
>> -----Original Message-----
>> From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]
>> On
>> Behalf Of l.leung at juno.com
>> Sent: Monday, March 03, 2003 8:59 AM
>> To: quattro at audifans.com
>> Subject: How do you tell if an H2O pump is failing? (NAC)
>>
>>
>> I was driving my beater (keeping the
>> 200Q a virtual hanger ('er cover) queen,
>> last night and this morn and 4 events
>> occurred:
>>
>> 1) Heater suddenly blew COLD.
>> 2) Temp guage climbed.
>> 3) Overflow bottle NEARLY bubbled over.
>> 4) Radiator stone cold.
>>
>> Car, '90 Scooby Legacy, ambient temps
>> around 35 last night, 12 this morn (degrees
>> F). Is this the water pump?
>>
>> TIA!
>>
>> LL - NY
>>
>>
>>
>>