Author Topic: New Cooling System what to use?  (Read 8743 times)

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Offline Just a Six?

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New Cooling System what to use?
« on: September 23 2020, 01:20:37 PM »
I have the new rad & heater core in & I've always used distilled water & RMI 25 but it rusts up a bit over time & I usually drain & refill it  every couple years. I'm wondering if I should use some anti-freeze or a bottle of that water pump lubricant additive? The 2 pipes from water pump to heater core running along the passenger side have a fair amount of rust inside them. I have a spray can of Rust Converter I used on some metal before it was painted & it worked half decent but I have to check if it will hold up being in water all the time? Any other ideas to deter rust in my nice new system?  :chin:
David
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Offline Steve Wood

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Re: New Cooling System what to use?
« Reply #1 on: September 23 2020, 01:38:54 PM »
You are not in a hot enough climate to really benefit from straight water and rmi25.  I would run a normal antifreeze mixture plus a 8 oz of rmi25 once a year and change it every couple of years.

I would not put rust converter in it as that stuff is usually acid based and that does not sound like a good idea to me.  Right now, the rust is probably adding to the strength of the tubing LOL
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Offline Steve Wood

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Re: New Cooling System what to use?
« Reply #2 on: September 23 2020, 01:48:35 PM »
btw, the normal life of rmi25 is six months as I recall....a lot of those water pump lubes don't last that long.
Steve Wood

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Offline nocooler

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Re: New Cooling System what to use?
« Reply #3 on: September 23 2020, 03:04:05 PM »
The evans waterless coolant has always intrigued me. But not enough to spend $50 a gallon + whatever the prep fluid costs. 
IhaveaV8

Offline Just a Six?

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Re: New Cooling System what to use?
« Reply #4 on: September 23 2020, 04:27:39 PM »
I would not put rust converter in it as that stuff is usually acid based and that does not sound like a good idea to me.  Right now, the rust is probably adding to the strength of the tubing LOL


Steve you're probably right! I'll grab some Prestone or similar & get it filled up. Thanks!  :cheers:
David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline 1KWIKSIX

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Re: New Cooling System what to use?
« Reply #5 on: September 23 2020, 05:36:18 PM »
David,don’t be a cheap bugger! 😉
You’re spent a bundle on the car and replaced the radiator , Heater so why not replace the steel coolant line with a stainless steel unit .
you’ll never have to worry about it again !
I’m with Steve on this one, I run Prestone antifreeze Plus RMI 25 and have so for years with no ill effects 👍

Offline Just a Six?

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Re: New Cooling System what to use?
« Reply #6 on: September 23 2020, 08:19:09 PM »
Dave I didn't know they exist I assume Kirban would sell them? I'll take a look & see what I find unless you have a link?  :D
David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline Shimy87

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Re: New Cooling System what to use?
« Reply #7 on: September 23 2020, 09:38:36 PM »
Question, the rmi 125, what's the advantage of adding this?
87 GN, K&N cold air, gutted cat, TT 5.7 chip, AFPR, 340 Walbro w/ hotwire, 60 LBS injectors, 981 valve springs, 206/206 Cam, RJC Powerplate, LS1 MAF & translator, Vacuum brakes, Hellwig rear sway bar, Energy suspension poly bushings, Razors Alky, Pypes exhaust, 5931 turbo, CK9.5 converter

Offline Just a Six?

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Re: New Cooling System what to use?
« Reply #8 on: September 23 2020, 10:16:19 PM »
I ran RMI25 with distilled water instead of any coolant back when I was at the track a lot so when I popped a head gasket it didn't damage the bearings. Pretty much all I've used in the car but will probably throw in some prestone this time.
David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline Steve Wood

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Re: New Cooling System what to use?
« Reply #9 on: September 23 2020, 11:57:08 PM »
rmi-25 is surfactant as well as it stops rust and keeps antifreeze from developing precipitates which clog cooling passages and reduces heat transfer from the water jackets to the coolant.  It is an additive and is good for about six months before it needs another shot.

When I lived in Houston, I ran distilled water and rmi from May to the beginning of  November.  It dropped coolant temps about 11 degs over an antifreeze mixture and keep everything clean in the cooling system.

It is used by long haul truckers and can often be found in truck shops.  I buy it by the quart as it is cheaper than way and get it mail order.
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Offline reality

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Re: New Cooling System what to use?
« Reply #10 on: September 24 2020, 07:44:55 AM »
I hear in Houston over heating vehicles are the least of their worries,

How did you measure the temp drop?  Themostat or no?

I believe RMI was developed by Detroit diesel but may be wrong on that,

Offline ULYCYC

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Re: New Cooling System what to use?
« Reply #11 on: September 24 2020, 09:09:33 AM »
I've been using rmi25 for years with no problems. But if you have any pinhole leaks you fixed with a stop=leak product in your radiator, heater core, freeze out plugs or what ever it will wash it away and leak again.
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Offline Steve Wood

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Re: New Cooling System what to use?
« Reply #12 on: September 24 2020, 09:41:06 AM »
Quote from: reality
I hear in Houston over heating vehicles are the least of their worries,

How did you measure the temp drop?  Themostat or no?

I believe RMI was developed by Detroit diesel but may be wrong on that,
Not using a thermostat can lead to problems.  It was on a summer day with the temp over 100 degs-think it was 103 to the best of my recollection.  Pretty sure the transmission fluid was not routed thru the radiator, either.

Reading the temp on my Scanmaster after prolonged idling.  Dual Spal fans.  Three pass aluminum radiator.  AC on.

I concur with your statement about Houston
Steve Wood

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Offline 1KWIKSIX

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Re: New Cooling System what to use?
« Reply #13 on: September 24 2020, 07:21:45 PM »
Quote from: Just a Six?
Dave I didn't know they exist I assume Kirban would sell them? I'll take a look & see what I find unless you have a link? 
GBody has em,
im running this on mine 

https://gbodyparts.com/turbo-buick-stainless-steel-coolant-lines-black-stainless-without-throttle-body-p-3908.html?osCsid=bb7930e00376ec49d6c523a1a3d3c819

Offline 1KWIKSIX

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Re: New Cooling System what to use?
« Reply #14 on: September 24 2020, 07:57:18 PM »
Why not try soaking in Evapo-Rust
I’ve been using this stuff for years and has worked great for me.
got it from Princess Auto


 

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