Anyone Not Recommend Using Engine Block Drain Plugs to Flush Coolant?
05-03-2010, 03:04 AM
#22
Melting Slicks
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Hi
Adding some Anti-calcium additives used for washing machines or Correga tabs ( used to clean 3rd dents ) and drive the car for a few miles, then flush it all out, will dissolve all the crude and it is amazing what all comes out of the engine.
For refilling, only use destilated or demineralized water with coolant additive as required.
Rgds. Günther
Adding some Anti-calcium additives used for washing machines or Correga tabs ( used to clean 3rd dents ) and drive the car for a few miles, then flush it all out, will dissolve all the crude and it is amazing what all comes out of the engine.
For refilling, only use destilated or demineralized water with coolant additive as required.
Rgds. Günther
05-03-2010, 09:01 AM
#23
Racer
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I would try to budge the plugs by tightening first. Not sure why, but any rusty hardware seems to break loose using this procedure. Anyone ever use CLR to clean the cooling system?
TommyJ
TommyJ
08-12-2013, 09:26 PM
#24
Melting Slicks
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Use distilled water right?
Also i couldn't get the drain plug outta drivers side of my 66 big block cause of its location to manifold. So I drained radiator and passenger side of block. Hope that is enough to get most old antifreeze out..
Also i couldn't get the drain plug outta drivers side of my 66 big block cause of its location to manifold. So I drained radiator and passenger side of block. Hope that is enough to get most old antifreeze out..
08-13-2013, 09:54 AM
#25
Yes.....distilled is what you want, especially when mixing with anti-freeze.
I have very soft well water, so I will flush with that, then run a few bottles of distilled through at the end. If you have hard city water with chemicals in it, I don't think I'd use that if you can't drain the block completely. If you want to get as much as possible, remove the T stat neck and flush water through it for a while, same with the radiator, that should get most of it.
I have very soft well water, so I will flush with that, then run a few bottles of distilled through at the end. If you have hard city water with chemicals in it, I don't think I'd use that if you can't drain the block completely. If you want to get as much as possible, remove the T stat neck and flush water through it for a while, same with the radiator, that should get most of it.
08-13-2013, 05:41 PM
#27
10-16-2018, 11:37 PM
#28
Instructor
Antifreeze slows down electrolysis to a crawl
10-17-2018, 02:13 PM
#29
Melting Slicks
I always pull those plugs. If they haven't been out in a while hit them with some heat a few times. Once I get them out and drain the block I replace them with brass plugs.
10-17-2018, 05:52 PM
#30
Race Director
If you can't get them out plus the thing out so that there's nothing left in it but water. Then when you drain all the water out, you know there's a gallon of water in there. So then you had a gallon of antifreeze now you got 50-50. Now you add 50/50 till it's full.
10-18-2018, 09:37 AM
#31
Burning Brakes
Ding ding, we have a winner. I have used this procedure and a 50/50 mixture with distilled water for the refill for 25 years, One radiator change and no cooling issues in all that time. I would never go to the trouble or take the risk of messing with drain plugs.
10-18-2018, 06:16 PM
#32
Instructor
??? If you can't get them out, then how do you get it down to one gallon of water left ???
10-23-2018, 04:38 PM
#34
Burning Brakes
If you want to try, use a six point socket on a 3/8 ratchet. If they are giong to budge they should with that set up. Plug should round off before breaking but no guarantee. If you get it out it the hole may well be caked over with crud. Use Awl or similar sharp tool to break crud out of way. I do not think the small amount of water left in block is worth the risk. IMHO, mds...
