'87 80 1.8 Heater problem

[Larry C Leung]

If you have CC, it could be a vacuum problem (which operates the valve).

LL - NY

On Thu, 03 Jan 2002 00:33:43 +0100 Tom Nas <tnas at euronet.nl> writes:
>At 18:19 2-1-02 -0500, Huw Powell wrote:
>
>> > Patient: '87 80 1.8 carb.
>> >
>> > Symptoms: outside temps just below freezing, engine gets hot
>(water temp
>> > gauge hits 90 C) but heater blows nothing but cold air with knob
>set to
>> > full heat. I get in a traffic jam, temp gauge goes to 100 C (I get
>slightly
>> > worried) and suddenly the heater starts working.
>> >
>> > I'm thinking sticking thermostat. Any other suggestions?
>>
>>I'd say the two places to start would be the thermostat (never hurts
>to
>>replace them) and the heater valve - remove the valve and see if it
>>really works, or if it is screwed up inside.  Undo one more hose and
>you
>>can flush your heater core.  two or three more and you flush the
>whole
>>system...
>
>
>Thanks, Huw. I don't suspect the heater valve because I didn't operate
>it
>when the heat stopped, or is that a common failure mode? I thought
>they
>just broke so that the operating mechanism got stuck in one
>position...
>
>A full flush might be a good idea. The car's overdue for some sort of
>maintenance anyway.
>
>Regards, Tom
>