Which heater hose to backflush ?
#1
#2
You won't be able to flush your block with a closed t-stat off of what you are describing(2" hoses) but if you wanted to flush your heater core, you can unhook one of the 1" hosed off the firewall and di it that way.
The return line for the coolant is the top radiator hose, then bottom is what the pump draws in.
Backflushing or forward flushing, no difference really. Coolant flows through the tubes all the same.
#3
Try not to disconnect the hoses right at the firewall, too high of chance of tweeking the heater core, and then having to replace it.
Disconnect the 2 lines at their other end (opposite the firewall), or in a splice part way along (or even make your own splice). Flush them both directions.
Disconnect the 2 lines at their other end (opposite the firewall), or in a splice part way along (or even make your own splice). Flush them both directions.
#5
#6
Acid eats pretty much through everything..Being that there are RUBBER hoses involved, I would highly suggest not using acid!
Also, CLR will etch and oxidate both copper and aluminum whch radiators and heater cores have in them. Acid will etch and oxidate as well.
My suggestion...If you need to do this procedure, your way past overdue for a coolant flush. More likely than not, something is going to give and eventually leak. If you keep up on maintenance, you won't ever have this type of issue.
#7
I used some kind of radiator flush in a tiny bottle from advance auto. I hooked up 2 pieces of hose to the heater core, one pointing down to a bucket, and the other up in the air with a funnel. I mixed super hot water with a little radiator flush, poured into the funnel and let it soak in the heater core for a few mins.
Rinse & repeat several times. Eventually, I had chunks come out. Before the procedure = no heat. Afterward, good heat.
Rinse & repeat several times. Eventually, I had chunks come out. Before the procedure = no heat. Afterward, good heat.
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#8
it doesn't matter which direction.. a matter of fact, it's actually best to flush it one way, and then reverse flush it the other.. a few times.. flush it until it comes out clear.. use a solvent if you like, if you don't, you'll just find it takes longer..
acid? really? dude.. that wasn't done on good advice.. seriously.. it will NOT eat rubber, (so long as it isn't REAL rubber, which most hoses aren't)- it will eat ANYTHING found on the periodic table or organic, it may take more time with some stuff than others, but not something synthetic.. but still... acid? by the way- Aluminum, iron, copper, bronze- all found on the periodic table.. steel is a combo of several periodic table critters... so, that was brave.. If that stuff wasn't flushed before you reattached the lines to the pump, and your engine got a wiff of it- I bet your freeze plugs aren't long for this world either.. especially if they are copper or bronze- which reacts to acid a lot faster than steel or aluminum..
CLR is good stuff.. just make sure you get it all out.. flush it until you'd feed your dog the water with confidence!
the T fitting mentioned is a nice gadget.. It isn't expensive.. grab one at the parts store..
acid? really? dude.. that wasn't done on good advice.. seriously.. it will NOT eat rubber, (so long as it isn't REAL rubber, which most hoses aren't)- it will eat ANYTHING found on the periodic table or organic, it may take more time with some stuff than others, but not something synthetic.. but still... acid? by the way- Aluminum, iron, copper, bronze- all found on the periodic table.. steel is a combo of several periodic table critters... so, that was brave.. If that stuff wasn't flushed before you reattached the lines to the pump, and your engine got a wiff of it- I bet your freeze plugs aren't long for this world either.. especially if they are copper or bronze- which reacts to acid a lot faster than steel or aluminum..
CLR is good stuff.. just make sure you get it all out.. flush it until you'd feed your dog the water with confidence!
the T fitting mentioned is a nice gadget.. It isn't expensive.. grab one at the parts store..
#9
#10