5,9 magnum hard crusties in the thermostat housing?
#3040803
05/08/22 05:51 PM
05/08/22 05:51 PM
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Joined: Feb 2003
Posts: 8,657
Andrewh
OP
master
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OP
master
Joined: Feb 2003
Posts: 8,657
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so I decided to take apart the coolant system on a 5.9 magnum in my 65 coronet. I kept finding coolant in my drip tray in front. so I wind up adding water periodically when I take it out. about half a gallon each time to top off the radiator. The overflow tank is always empty. but I have changed the coolant a few times over the last 4 or 5 years due to fan issues, making me pull the rad out.
It has been a few years since I changed the hoses out, and I cobbled the hoses to make it fit, so it couldn't hurt to replace some of the ends with the silicone replacement elbows I have been seeing, for a better fit. i have some of those steel accordioned tubing to make some odd runs. I noticed the insides of them were rust colored even though the coolant is green. even when I watch it circulate.
I pulled the top hose off and noticed inside the thermostat housing some weird build up. like I would call it piles of stuff on the side walls of the tube. I went to pull them off but they were hard crusts, and eventually broke off, but in doing so, crumbled up.
I haven't pulled the zinc anode I installed yet. But was wondering if I should be checking something else?
Coolant came out orange when it started at the low point drain, but went green really fast.
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Re: 5,9 magnum hard crusties in the thermostat housing?
[Re: Andrewh]
#3040839
05/08/22 08:38 PM
05/08/22 08:38 PM
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Joined: Feb 2003
Posts: 16,117 Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,117
Mesa, Arizona
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so I decided to take apart the coolant system on a 5.9 magnum in my 65 coronet. I kept finding coolant in my drip tray in front. so I wind up adding water periodically when I take it out. about half a gallon each time to top off the radiator. The overflow tank is always empty. but I have changed the coolant a few times over the last 4 or 5 years due to fan issues, making me pull the rad out.
It has been a few years since I changed the hoses out, and I cobbled the hoses to make it fit, so it couldn't hurt to replace some of the ends with the silicone replacement elbows I have been seeing, for a better fit. i have some of those steel accordioned tubing to make some odd runs. I noticed the insides of them were rust colored even though the coolant is green. even when I watch it circulate.
I pulled the top hose off and noticed inside the thermostat housing some weird build up. like I would call it piles of stuff on the side walls of the tube. I went to pull them off but they were hard crusts, and eventually broke off, but in doing so, crumbled up.
I haven't pulled the zinc anode I installed yet. But was wondering if I should be checking something else?
Coolant came out orange when it started at the low point drain, but went green really fast. Where do you live?
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: 5,9 magnum hard crusties in the thermostat housing?
[Re: 1969ronnie]
#3040895
05/09/22 06:43 AM
05/09/22 06:43 AM
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Joined: Jan 2021
Posts: 948 rust belt
Moparite
super stock
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super stock
Joined: Jan 2021
Posts: 948
rust belt
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I meant when I first opened the drain, it looked orange. then quickly went green as it was draining. Rust (brown) mixed with green can look that way when draining. I bought my truck from a dealer and i know it had a leaking freeze plug that either the previous owner or the dealer put in stop leak. After i got it home i pulled the lower freeze plugs on both sides of the block. I then put some brass fittings together(so i could position the nozzle) to pressure wash out the block. You would be amazed at the curd at the bottom of the block. Since this is a Texas truck it may have been run with out antifreeze at some point. This may be something you could consider if you see rust coming out when you flush it.
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Re: 5,9 magnum hard crusties in the thermostat housing?
[Re: Andrewh]
#3040930
05/09/22 09:48 AM
05/09/22 09:48 AM
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Joined: Feb 2003
Posts: 16,117 Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,117
Mesa, Arizona
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Lots of minerals in the water. Corrodes aluminum workin overtime. Best to use distilled water.
“So if it’s on the internet it must be true”
Abe Lincoln
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