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post #1 of (permalink) Old 01-28-2007, 06:46 PM Thread Starter
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What is the proper procedure /Coolant Flush????

I'm having a serious brain fart, so I did I search went through about 500 posts and couldn't find what I was looking for. So here are my questions. <ul type="square">[*]What is the procedure to flush the entire cooling system radiator, block, heater core?[*]Should an additive be used to get rid of sludge and scale and if so what kind/brand?[*]How do you properly return the 50/50 mixture to the entire system?[/list]I know, I know all these answers but for some reason I can't think of it. [img]/ubbthreads/images/graemlins/wall.gif[/img] Maybe what happened is I retained so much information that the answers to these questions got pushed out...yeah that must be it I'm too smart when it comes to other things so I forget the little stuff.
(No nasty comments on my theory of forgetfulness I needed to feel a little better about my CRS [img]/ubbthreads/images/graemlins/codger.gif[/img])
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post #2 of (permalink) Old 01-28-2007, 07:28 PM
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Re: What is the proper procedure /Coolant Flush???

Hey John, get yourself a reverse flush kit. They're about $4 at Wal-Mart.

Then I usually drain the system and fill it with water and a CLR mix. I run the engine up to temp and then let it cool off.

Once cool, I start the reverse flush procedure. Then I repeat the process, rinse/flush/shampoo/repoo...

If it's not been done for a while, I don't flush anything through the heater core. I bypass it. If you don't you could force debris in the heater core and plug it.

Reverse flush the heater core in a separate operation.

Then when done, I mix 50/50 anti-freeze to water and install it in the engine... burp the system and you're done.

See... easy as pie.
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post #3 of (permalink) Old 01-28-2007, 09:16 PM
 
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Re: What is the proper procedure /Coolant Flush???

Reverse flush? Is that the little "T" fitting for the upper heater hose? It's been a long time since I've done it, too. And how would one isolate the heater core - just leave it in the "off" position in the cab? (I know big trucks have a separate valve that looks much like an outside faucet valve, but I've never seen one on a car...)

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post #4 of (permalink) Old 01-28-2007, 09:30 PM
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Re: What is the proper procedure /Coolant Flush???

Yep, that's the T fitting. I cut the heater hoses and couple the engine and a T together... works for me!

That cuts the heater core out of the fluid circuit.
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post #5 of (permalink) Old 01-28-2007, 09:36 PM
 
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Re: What is the proper procedure /Coolant Flush???

Any opinion as to whether or not it's good to pull the thermostat out while flushing as an aid to the cleansing process? And then put a new one in when the fresh fluids are installed?? [img]/ubbthreads/images/graemlins/grin.gif[/img]
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post #6 of (permalink) Old 01-28-2007, 09:40 PM
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Re: What is the proper procedure /Coolant Flush???

I've done it both ways... I leave the thermostat in and use the T in the heater hose to burp any air out of the system.
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post #7 of (permalink) Old 01-28-2007, 11:58 PM
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Re: What is the proper procedure /Coolant Flush???

Remember, the Heater core lines are internal to the engine so they will bypass the t-stat.

I would first drain the water and see how it looks...if the system has been neglected, then yes, you might need to use a flush.

If you don't ming me asking, why do you think you need a flush? Are you starting to overheat? It has been my experience that overheating under normal driving conditions is more often because of a change in air flow or a slightly leaking head gasket.
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post #8 of (permalink) Old 01-29-2007, 08:19 PM Thread Starter
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Re: What is the proper procedure /Coolant Flush???

Reason I need a flush...previous owner had a 2 inch crack in the radiator and used stop leak to make it stop. I made him buy me a new radiator after I found out about it to the tune of $325 don't you love family. So I want to get that crap out of my motor and my heater core plus the thermostat is stuck open I assume partly due to stop leak.
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post #9 of (permalink) Old 01-29-2007, 08:23 PM Thread Starter
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Re: What is the proper procedure /Coolant Flush???

Alright larry how do you reverse flush the heater core? The directions say to put the "T" in the inlet heater hose the only way I could see to reverse flush the heater core would be to put a "T" into the outlet heater hose as well and force water through the heater core in the reverse is this the right way or am I thinking funny again?
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post #10 of (permalink) Old 01-29-2007, 08:48 PM
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Re: What is the proper procedure /Coolant Flush???

John, I think you're over thinking this...don't think of the "right way" anymore. What I do is to affix the hose to the kit's T. Then I turn the hose on full with the radiator cap off. That way the gunk reverse flows out the radiator. Don't stand in front of the radiator! You're going to see a whole lot of crud flying out the radiator. One the water is spewing clear, you're pretty much done, unless you want to run some more cleaner through the system.

If the thermostat is out of the system it's not going to block the top of the block, and water will flow there as well.

Now remember, I join the heater hoses to take the heater core out of the system. It's really a pretty simple task.
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