'01 QC4x4 2500 V8 heating issue.

Done all that with the exception of blocking off the radiator.
I do have more heat now but not quite as much as I remem-
ber. No air in the system anymore...been purged out. With
the temp I see being indicated...it seems the air coming out
of the vents should be hotter.

--
------------------------------------------
Laszlo Almasi
----Cool Toys (formerly Carolina Watercraft Works)
----Mack Daddy Trailers
----Ice Angels


"Tom Lawrence" <tlawrence5 DeleteThis @earthlink.net> wrote in message
news:4748651a$0$68459$892e0abb@auth.newsreader.octanews.com...
>> on full. I flushed the core out and flow seemed unrestricted
>> when I put the new thermo in. And ideas?
>
> Air pocket in the system? Try starting it and idling for a while with the
> radiator cap off (block the radiator with some cardboard) until the
> thermostat opens up (upper hose will get real hot). After a couple of
> minutes after the thermostat opens, shut it down, top off the radiator,
> replace the cap, start back up, and see if the heat improves.
>
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

> the temp I see being indicated...it seems the air coming out
> of the vents should be hotter.

Are both heater hoses approximately the same temperature? If not, you've
still got a restriction in the heater core. If they are, then I'd say
you've got a problem with the blend air door not opening all the way.
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

I'll check the hoses. Where is the blend door located?

--
------------------------------------------
Laszlo Almasi
----Cool Toys (formerly Carolina Watercraft Works)
----Mack Daddy Trailers
----Ice Angels


"Tom Lawrence" <tlawrence5.DeleteThis@earthlink.net> wrote in message
news:4748f19e$0$68465$892e0abb@auth.newsreader.octanews.com...
>> the temp I see being indicated...it seems the air coming out
>> of the vents should be hotter.
>
> Are both heater hoses approximately the same temperature? If not, you've
> still got a restriction in the heater core. If they are, then I'd say
> you've got a problem with the blend air door not opening all the way.
>
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

Ok, checked the hoses and they are essentially the same
temp. The return is only slightly "not as hot" which I think
is correct seeing as how the core is basically a radiator
and the coolant is slightly cooled as it passes thru.

--
------------------------------------------
Laszlo Almasi
----Cool Toys (formerly Carolina Watercraft Works)
----Mack Daddy Trailers
----Ice Angels


"Carolina Watercraft Works" <cooltoys.DeleteThis@bellsouth.net> wrote in message
news:86j2j.1974$Mu4.716@bignews7.bellsouth.net...
> I'll check the hoses. Where is the blend door located?
>
> --
> ------------------------------------------
> Laszlo Almasi
> ----Cool Toys (formerly Carolina Watercraft Works)
> ----Mack Daddy Trailers
> ----Ice Angels
>
>
> "Tom Lawrence" <tlawrence5.DeleteThis@earthlink.net> wrote in message
> news:4748f19e$0$68465$892e0abb@auth.newsreader.octanews.com...
>>> the temp I see being indicated...it seems the air coming out
>>> of the vents should be hotter.
>>
>> Are both heater hoses approximately the same temperature? If not, you've
>> still got a restriction in the heater core. If they are, then I'd say
>> you've got a problem with the blend air door not opening all the way.
>>
>>
>
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

> I'll check the hoses. Where is the blend door located?

Inside the HVAC box, which is behind the dash. It's not an easy job to get
to it. Unfortunately, it sounds like you're down to that as the only other
possibility (if you're really sure that it used to blow hotter than it is
now).
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

"Tom Lawrence" <tlawrence5 RemoveThis @earthlink.net> wrote in message
news:474a1fa3$0$68470$892e0abb@auth.newsreader.octanews.com...
>> I'll check the hoses. Where is the blend door located?
>
> Inside the HVAC box, which is behind the dash. It's not an easy job to
> get to it. Unfortunately, it sounds like you're down to that as the only
> other possibility (if you're really sure that it used to blow hotter than
> it is now).
>

After following this thread, I seem to lean towards your latter Tom. I have
had several occaisions over the years where changing a thermostat has
changed the heater temps slightly one way or the other. Just a very few
degrees in the temperature that the thermostat opens/closes can translate to
quite a bit from the heater. If the replacement is a slightly lower value,
or just opens at a bit lower temperature it would be noticeable. I would say
to try a thermostat maybe 10degs higher in value and just see if that makes
a difference. The engine computer should compensate easily for such a small
change as far as everything else goes. It's a shot, but at least a cheap
one........ If that isn't the problem, I agree the HVAC would be
next.......and that ain't cheap.....or easy.


Ed
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

"Tom Lawrence" <tlawrence5.DeleteThis@earthlink.net> wrote in message
news:474a1fa3$0$68470$892e0abb@auth.newsreader.octanews.com...
>> I'll check the hoses. Where is the blend door located?
>
> Inside the HVAC box, which is behind the dash. It's not an easy job to
> get to it. Unfortunately, it sounds like you're down to that as the only
> other possibility (if you're really sure that it used to blow hotter than
> it is now).
>

Might I suggest measuring the "actual" discharge temp of the HVAC system
before proceeding further? Doesn't "seem" as warm is too subjective for me
to warrant the time and expense of blend door surgery. Get a thermometer,
measure the discharge temp and report back.

Mike
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

> Might I suggest measuring the "actual" discharge temp of the HVAC system
> before proceeding further? Doesn't "seem" as warm is too subjective for
> me to warrant the time and expense of blend door surgery.

That's the reason for the disclaimer at the end :^)
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

Already been thinking to do that. I have a digital thermo but
needs new batteries. Will do this and report back.

Ain't this a grand 'ole newsgroup?

--
------------------------------------------
Laszlo Almasi
----Cool Toys (formerly Carolina Watercraft Works)
----Mack Daddy Trailers
----Ice Angels


"Mike Simmons" <mikesim.DeleteThis@yhti.net> wrote in message
news:13klaoenblahk38@corp.supernews.com...
>
> "Tom Lawrence" <tlawrence5.DeleteThis@earthlink.net> wrote in message
> news:474a1fa3$0$68470$892e0abb@auth.newsreader.octanews.com...
>>> I'll check the hoses. Where is the blend door located?
>>
>> Inside the HVAC box, which is behind the dash. It's not an easy job to
>> get to it. Unfortunately, it sounds like you're down to that as the only
>> other possibility (if you're really sure that it used to blow hotter than
>> it is now).
>>
>
> Might I suggest measuring the "actual" discharge temp of the HVAC system
> before proceeding further? Doesn't "seem" as warm is too subjective for
> me to warrant the time and expense of blend door surgery. Get a
> thermometer, measure the discharge temp and report back.
>
> Mike
>
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

> Inside the HVAC box, which is behind the dash. It's not an easy job to
> get to it. Unfortunately, it sounds like you're down to that as the only
> other possibility (if you're really sure that it used to blow hotter than
> it is now).

The controller for the blend door is on the underside. While its hard to get
to with screwdrivers, its easier than removing the entire HVAC unit. Also,
if you test the adjuster for the blend door and find no problem, it could be
the blend door is somehow stuck. If that turns out to be your problem, I
have experience on that too. You don't necessarily need to remove the HVAC
unit.
--
Max

"Everyone is entitled to his own opinion, he is not entitled to his own
facts." Sen. Daniel Patrick Moynihan of New York



"Tom Lawrence" <tlawrence5 RemoveThis @earthlink.net> wrote in message
news:474a1fa3$0$68470$892e0abb@auth.newsreader.octanews.com...
>> I'll check the hoses. Where is the blend door located?
>
> Inside the HVAC box, which is behind the dash. It's not an easy job to
> get to it. Unfortunately, it sounds like you're down to that as the only
> other possibility (if you're really sure that it used to blow hotter than
> it is now).
>
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

"Tom Lawrence" <tlawrence5.TakeThisOut@earthlink.net> wrote in message
news:474ad2f9$0$68485$892e0abb@auth.newsreader.octanews.com...
>> Might I suggest measuring the "actual" discharge temp of the HVAC system
>> before proceeding further? Doesn't "seem" as warm is too subjective for
>> me to warrant the time and expense of blend door surgery.
>
> That's the reason for the disclaimer at the end :^)

Awright, already!! I missed the disclaimer the first time.....

sheesh....

;^)

Mike

>
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

Ok, outside temp is 40-43 degrees, thermometer in upper
vent indicates about 115 degrees. Brand new 195 degree
thermostat.

--
------------------------------------------
Laszlo Almasi
----Cool Toys (formerly Carolina Watercraft Works)
----Mack Daddy Trailers
----Ice Angels


"Carolina Watercraft Works" <cooltoys.RemoveThis@bellsouth.net> wrote in message
news:A3C2j.2483$Mu4.2089@bignews7.bellsouth.net...
> Already been thinking to do that. I have a digital thermo but
> needs new batteries. Will do this and report back.
>
> Ain't this a grand 'ole newsgroup?
>
> --
> ------------------------------------------
> Laszlo Almasi
> ----Cool Toys (formerly Carolina Watercraft Works)
> ----Mack Daddy Trailers
> ----Ice Angels
>
>
> "Mike Simmons" <mikesim.RemoveThis@yhti.net> wrote in message
> news:13klaoenblahk38@corp.supernews.com...
>>
>> "Tom Lawrence" <tlawrence5.RemoveThis@earthlink.net> wrote in message
>> news:474a1fa3$0$68470$892e0abb@auth.newsreader.octanews.com...
>>>> I'll check the hoses. Where is the blend door located?
>>>
>>> Inside the HVAC box, which is behind the dash. It's not an easy job to
>>> get to it. Unfortunately, it sounds like you're down to that as the
>>> only other possibility (if you're really sure that it used to blow
>>> hotter than it is now).
>>>
>>
>> Might I suggest measuring the "actual" discharge temp of the HVAC system
>> before proceeding further? Doesn't "seem" as warm is too subjective for
>> me to warrant the time and expense of blend door surgery. Get a
>> thermometer, measure the discharge temp and report back.
>>
>> Mike
>>
>>
>
>
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue. 

"Carolina Watercraft Works" <cooltoys.DeleteThis@bellsouth.net> wrote in message
news:ijU3j.5746$N67.4575@bignews5.bellsouth.net...
> Ok, outside temp is 40-43 degrees, thermometer in upper
> vent indicates about 115 degrees. Brand new 195 degree
> thermostat.
>

Laz just for the hell of it, tape the thermometer to the heater hose and get
an idea on what you have going into the truck
 >> Stay informed about: '01 QC4x4 2500 V8 heating issue.