99 Blazer Heater not working And Yes i Read Threads

[Kay1210]

And if these caps were so defective why isnt chevy recalling them and fixing the problems this has caused people. FREE BACKFLUSH FOR EVERYONE! LOL

[BlazerLT]

Originally Posted by Kay1210

And if these caps were so defective why isnt chevy recalling them and fixing the problems this has caused people. FREE BACKFLUSH FOR EVERYONE! LOL

Because it is easier to use dexcool as the scapegoat.

[Rick Norwood]

Originally Posted by Kay1210

Ok so you are saying follow what rick was telling me to do. And that should backflush out the heater core.

O.K. here is a quick trick that might just help you TEMPORARILY! With the engine off and cool, remove both heater hoses at the firewall, Take your garden hose (with the end cut off) and attach it to the smaller hose fitting with a hose clamp, then slowly turn on the water until see it coming out the other fitting. Ultimately, you will turn the water on full force and let the core flush for a few minutes. Turn off the water and move the hose to the other fitting and flush another minute or so going the opposite direction. Re-attach the hoses, start the truck and top off your antifreeze. This shouldn't cost you any more than the price of a jug of antifreeze.

[blazee]

You can drain some antifreeze out in a jug before you start and it won't cost any thing. The drain plug can be a PITA though.

[talonx]

It may be a Dex cool thing... but I actually made up
a weak solution of muriatic acid (with water) and put it in the heater core for a few minutes, then flushed the core out with water.
I mixed up the solution so it would just clean off oxidation from copper pipe.
It worked and that was 2 years ago.
Cause the regular flush did not work.

[BlazerLT]

Originally Posted by talonx

It may be a Dex cool thing... but I actually made up
a weak solution of muriatic acid (with water) and put it in the heater core for a few minutes, then flushed the core out with water.
I mixed up the solution so it would just clean off oxidation from copper pipe.
It worked and that was 2 years ago.
Cause the regular flush did not work.

Acid flushes are NOT recommended.

Muriatic acid is just a Hydrochloric Acid and could do a lot of damage in our cooling systems.

We want to neutralize the acid, not add to it.

[Rick Norwood]

Originally Posted by talonx

It may be a Dex cool thing... but I actually made up
a weak solution of muriatic acid (with water) and put it in the heater core for a few minutes, then flushed the core out with water.
I mixed up the solution so it would just clean off oxidation from copper pipe.
It worked and that was 2 years ago.
Cause the regular flush did not work.

Please be a little more specific. For example, mix 1 cup of Muratic acid to 1 gallon of water. Poured into heater core let stand for 5 minutes. flushed for 5 minutes with clean water.

Also, did you add anything to neutralize the acid afterwards, like Baking Soda?

If you give as much info as you can, you might prevent someone from trashing their system from guessing.

Thanks - Rick just my

[Rick Norwood]

Originally Posted by BlazerLT

Acid flushes are NOT recommended.

Muriatic acid is just a Hydrochloric Acid and could do a lot of damage in our cooling systems.

We want to neutralize the acid, not add to it.

Pretty much what I was thinking. I can just see some newbie filling his radiator with acid right out of the pool store. DON'T DO IT!

STICK WITH THE COMMERCIAL CLEANERS AND POWER FLUSHES. IF ALL ELSE FAILS, REPLACE THE PLUGGED CORE AND LEARN ABOUT PROPER ROUTINE MAINTENANCE.

[talonx]

lol, yeah I didn't say it was the best solution.
It was my last resort. I knew that the core was
getting clogged intermittently and figured
it was the same build up that you get on your
radiator cap.

If you do it use more wayer than acid. The mixture
should NOT make copper smoke. Just enough to clean a penny after maybe 30 seconds.
I did not leave it in for more than a minute.

I would try a regualr flush first.....

[BlazerLT]

Originally Posted by talonx

lol, yeah I didn't say it was the best solution.
It was my last resort. I knew that the core was
getting clogged intermittently and figured
it was the same build up that you get on your
radiator cap.

If you do it use more wayer than acid. The mixture
should NOT make copper smoke. Just enough to clean a penny after maybe 30 seconds.
I did not leave it in for more than a minute.

I would try a regualr flush first.....

Then state that and not just state the last ditch resort measure from the start.

Post completely or thoroughly or don't press the reply button.

Your post could have caused someone 1000s or 1000s of dollars through your negligence of not telling the whole story from the start.