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O/T: flushing truck heater core?

M

MeAnthony

Member
"95 Dodge truck, heater barely gets warm. Very noticeable difference in temperature of the heater core hoses under the hood, so I"m pretty sure the problem is isolated to the heater core itself.

I have one of those little pumps that you run with a drill. I"m planning to hook the heater core hoses to it and run a cleaner chemical through it. What have y"all found to work best for this?

Thanks,

Anthony
 
I usually have good look just flushing with a water hose, might force a little cleaner thru it just by pouring in the hose and forceing in with water, let it soak.
 
Don't bother with a drill pump. Not enough flow. Water hose would be better. I use an air hose. Take both hoses off at the engine and back flush with air. Fill with water and hit it again. I'm done this about a dozen times and it has worked really good.
 
As already posted, I've used shop air. Take both hoses off and cover one with a shop towel. Use a rubber tip blow gun on the other and make it sneeze in short bursts. Do it both ways in short bursts. Then flush with water. Don't get carried away with the air pressure or your next project may be heater core replacement. Gerard
 
You probably need to change your antifreeze more often as it has probably lost its rust inhibitor.
Hal
 

I once bought a kit at a department store that included a tee that you left in the heater line and the product that you flushed with. fitting included garden hose adapter.
 
Back flush with a garden hose.

Cut/peel the old hoses off. DO NOT pull,twist, etc.

In the future, change the antifreeze/distilled water every two years.

Dean
 
used z bowl, i think, toilet bowl cleaner non corrosive, some cleaners will eat the core but the z bowl won't; cleaned the last few with this product pour in let sit run water through with water hose get new hoses refill, make more heat.
 
The best item for the repair you want is a large open space on the shop floor.

You will need it to lay out all the pars of the dashboard and associated parts. The heater core is not particularly expensive but I would budget about 12 hours for that r&r.

I used to own a '97 and tried several chemical products but ultimately ended up changing the core out.

Good luck,

Brad
 
(quoted from post at 00:08:52 01/08/12) Don't bother with a drill pump. Not enough flow. Water hose would be better. I use an air hose. Take both hoses off at the engine and back flush with air. Fill with water and hit it again. I'm done this about a dozen times and it has worked really good.
Click to expand...

If it worked so good , why have you done it so many times?
 
Careful if you use the wrong chemical you'll have to replace the heater core. If it's aggressive enough to attack the mineral deposit quickly it'll probably attack the core too and they are not that thick. Don't ask me how I know this (okay it was my brother he did it).
 
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