Re: [DMCForum] Re: Heater...

[DMCVIN6683 <dmcvin6683@xxxxxxxxx>]

Start from the back of the engine area because thats where the heating 
system gets its hot antifreeze from.

Mark V



On Tuesday, November 9, 2004, at 12:05  AM, mw98gt wrote:

>
>
> So what should I check first?  The lines for kinks/clogs?  The
> heater core?  The valve?
>
> Misha
>
> --- In DMCForum@xxxxxxxxxxxxxxx, DMCVIN6683 <dmcvin6683@xxxx> wrote:
>> You could also have a broken heater control valve located behind
> the
>> passenger side head of the engine.
>>
>> Mark V
>>
>>
>> On Monday, November 8, 2004, at 06:32  PM, ryanpwright wrote:
>>
>>>
>>>
>>> Also - pull the rubber hoses off of the metal. There are four
> places
>>> where this happens, 2 of these locations are at the front
> passenger
>>> wheel, the other two are at the rear passenger side under the
>>> removable sheetmetal plate thing. (Careful, there are also A/C
> lines
>>> running here - don't open those!)
>>>
>>> Once you have the rubber hoses off, check for restrictions. I had
>>> deposits formed at each end of both supply & return metal heater
> core
>>> lines that were acting as "caps" - I didn't even notice them the
> first
>>> time I had the hoses off. For some reason I ended up pulling
> them off
>>> again and while feeling around in there, felt that the pipe
> seemed
>>> rather solid, instead of hollow. I used a piece of wire to break
> up
>>> the debris and a blast of air at 90psi to clean the pipes out.
> Careful
>>> here that you don't vaporize the old nasty coolant here. I'd go
> with a
>>> less intensive burst of air to get the coolant out intact, then
> hit it
>>> with 90psi to get the remaining gunk out.
>>>
>>> -Ryan
>>>
>>> --- In DMCForum@xxxxxxxxxxxxxxx, "Walter Coe" <Whalt@xxxx> wrote:
>>>> Misha, now that you have felt the pipes running along the
>>>> frame and feel that they are not getting hot, this tells you
>>>> that little or no coolant is circulating there.  Next is to
>>>> find out why.  Like Johnny said, you could have a plugged
>>>> heater core.  Other things to check for:
>>>>
>>>> See if a previous owner bypassed your heater core.  If it
>>>> was leaking, they might have just capped off the hoses going
>>>> to it.  This could have been done at the heater core or
>>>> closer to the engine.
>>>>
>>>> Look for a kinked or crushed tube or hose.  This could be
>>>> one of the aluminum lines running along the frame, one of
>>>> the brass lines on the heater core or one of the rubber
>>>> hoses.
>>>>
>>>> Check that the heater valve is working properly.  This is a
>>>> vacuum actuated valve in front of the engine (next to &
>>>> under the ignition coil in the engine compartment).  If it
>>>> has a problem, most likely it is stuck shut.  This valve
>>>> should only close when the mode switch is on MAX.  It sends
>>>> a vacuum signal to the valve causing it to close.
>>>>
>>>> Consider that maybe you have some hoses routed the wrong
>>>> way.  Since you recently replaced your water pump you are
>>>> more familiar with where the hoses go.
>>>>
>>>> Walt
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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