Re: [DMCForum] Re: Heater...
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Re: [DMCForum] Re: Heater...
- From: DMCVIN6683 <dmcvin6683@xxxxxxxxx>
- Date: Mon, 8 Nov 2004 18:40:33 -0600
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
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