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Old 05-23-2019, 04:50 PM   #1
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Coolant?

Hey there, Is there anything I should know about coolant for my 1991 7.3L IDI? I was expecting it to have some kind of special needs but the good old folks down at AutoZone are telling me its just regular green coolant. Is this right?
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Old 05-23-2019, 04:53 PM   #2
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If what was in there is green, put more green in.
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Old 05-23-2019, 05:12 PM   #3
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x2...^...Check to see what you have in, and keep it the same.
Unless you want a different colored A/F in your bus?
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Old 05-24-2019, 04:50 PM   #4
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They're correct in that you should use regular green. What they didn't mention is that you should get a few test strips and check for the correct levels for glycol, acidity, and sca levels in the antifreeze. Then you can add additive as required to keep it at an acceptable level.
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Old 05-24-2019, 08:03 PM   #5
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Quote:
Originally Posted by Booyah45828 View Post
They're correct in that you should use regular green. What they didn't mention is that you should get a few test strips and check for the correct levels for glycol, acidity, and sca levels in the antifreeze. Then you can add additive as required to keep it at an acceptable level.
Okkkk.... How do I know what the levels are supposed to be??
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Old 05-24-2019, 08:04 PM   #6
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50/50 mix of conventional green is all you need.
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Old 05-24-2019, 08:05 PM   #7
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Okkkk.... How do I know what the levels are supposed to be??
The strips will tell you what temp your are good to, the PH level and the alkalinity of the mixture.


https://www.google.com/search?q=ISB+...hrome&ie=UTF-8
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Old 05-24-2019, 08:09 PM   #8
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The strips will tell you what temp your are good to, the PH level and the alkalinity of the mixture.


https://www.google.com/search?q=ISB+...hrome&ie=UTF-8
And don't buy the 50/50 antifreeze, it costs the same as full strength and it's half water.
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Old 05-24-2019, 08:11 PM   #9
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A cheapo prestone squeeze bulb tester is good if strips are unavailable.
The cooling system if stock, holds quite a bit of coolant so a drain and refill could get expensive...

https://www.walmart.com/ip/AF-1420-A...0df199b34d908b
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Old 05-24-2019, 08:12 PM   #10
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Originally Posted by Johnny Mullet View Post
50/50 mix of conventional green is all you need.
Okey dokey thanks all
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