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12-03-2012, 03:22 AM
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#1 |
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What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Best coolant flush
I am dealing with coolant that is constantly for lack of a better description at the moment, cruddy...
The engine use to run very clean coolant in the radiator, but ever since it sat for years with only water in the system it developed a lot of sediment. I have already flushed the system for practically an entire day, and after doing that it was very clean and then added a mix of anti freeze. Well, the radiator coolant is again full of rusty sediment, and I want to try to flush this out again since I want to put a new radiator in. But I don't want to put a new radiator in if the system is full of crud again. So, my question is this. Other than doing what I did before, by idling the engine for hours with a hose off the radiator drain petcock and a steady flow of fresh water. Is there an additive that one can put into the cooling system to clean out the rusty sediment from the engine, and not create a new problem by doing so?
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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12-03-2012, 03:27 AM
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#2 |
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Registered User
 
Join Date: Nov 2007
Location: Turlock California 95380
Posts: 2,075
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Re: Best coolant flush
I would pull the plugs on both sides of the block to let the funky stuff out. There kind of a pain to get to but it lets out most of it...
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72 C20 Longbed 05 1500 Z71 |
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12-03-2012, 03:42 AM
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#3 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Best coolant flush
Chris pulling the plugs might be the best route. But some people have really good luck with citric acid. Here are a couple of links to read up on. I'd contact VWNate1 for elaboration.
Post #19 http://67-72chevytrucks.com/vboard/s...d.php?t=538630 Post #42 http://67-72chevytrucks.com/vboard/s...=471078&page=2
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Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 12-03-2012 at 03:50 AM. Reason: missing link |
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12-03-2012, 12:41 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: St. Paul MN.
Posts: 1,996
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Re: Best coolant flush
I have used this with awesome results
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