[DML] Re: Cleaning off heater core to improve airflow

["Harold McElraft" <hmcelraft@xxxxxxx>]

Taking it apart would be the last thing I would do. The AC evaporator 
is before the heater core so any obstructions are probably there. If 
you remove the blower motor you can access it with a vacuum.

That could be some of your problem but, if you haven't checked, and I 
assume you feel the lack of air is on ALL speeds, I would suspect the 
blower motor is dragging or the blower cage fins are full of dirt.

When you take the blower motor out you can use a spray gun (like the 
type on bug-spray gallons) with water to flush the evaporator too.

These are things I have done to restore my air flow.

Over the years, on this car, I have lost air flow when the fuse 
holder for speeds 1 and 2 (that also runs the AC clutch, etc.) 
burned. All speeds slowed when the connection to the blower motor 
became weak (and burned). I have replaced the blower motor two times -
 the old ones just started dragging because the bearing surfaces on 
the motors became shot.

Harold McElraft - 3354


--- In dmcnews@xxxxxxxxxxxxxxx, "ksgrimsr" <knut.s.grimsrud@...> 
wrote:
>
> Hi guys,
> 
> I'm getting pretty low airflow through my heater/AC system and 
suspect 
> that I have an accumulation of lint on the heater core restricting 
> airflow (which would be reasonable for my 190K mile car).
> 
> I reviewed the workshop manual that outlines how to remove the core 
> (including discharging the AC system, emptying coolant, etc). I 
don't 
> really need to remove/replace the system, I just need to expose it 
> sufficiently to allow me to vacuum it off well.
> 
> Does anyone have first-hand experience with this that can provide 
> recommendations for how to best clean off the core (hopefully 
without 
> wholesale removal of everything)?
> 
>     Knut
>




To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/dmcnews/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:dmcnews-digest@xxxxxxxxxxxxxxx 
    mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/