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Old 03-12-2017, 09:03 PM   #1
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correct coolant for ford lehman 120

I cannot remember what kind of coolant is correct for this engine. I read ethylene glycol is preferred, and the coolant I have now is green. Anything else to know or specify?
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Old 03-12-2017, 09:10 PM   #2
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Greetings,
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Old 03-12-2017, 11:56 PM   #3
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Colour is immaterial nowadays. Pick a good 5 year diesel-spec coolant.

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Old 03-13-2017, 01:25 AM   #4
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Quote:
Originally Posted by Xsbank View Post
Colour is immaterial nowadays. Pick a good 5 year diesel-spec coolant.

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And yeah, a lot of them are green. Mine is and I use it in that exact engine.
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Old 03-13-2017, 02:06 AM   #5
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Mine is green and the concentrate was mixed with distilled water, apparently that`s important. If you buy 5L packs of it ready to use it is already diluted(? they use distilled/demineralized water).
That engine can get silting in the passages at no6 cylinder, leading to overheating, requiring an aggressive flushing. Is doing the coolant connected to that by any chance?
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Old 03-13-2017, 06:11 AM   #6
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American Diesel recommended just plain old style ethylene glycol such as Prestone extended life because of the old engine design.
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Old 03-13-2017, 06:55 AM   #7
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Yes plain old green ethylene glycol. Can't just use anything. All coolants are specifically designed for specific engine materials. The older spec coolants are fine for cast steel blocks with steel heads etc. the more modern engines with combination of metals require a different coolant to combat any chemical reactions between metals. It's not just about anti boil and anti freeze
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Old 03-13-2017, 07:17 AM   #8
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Greetings,
Can't remember the particulars but also different coolant, I think, for sleeved and non sleeved engines or is it wet and dry sleeved engines????
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