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I know Ford Gold is a GO5 coolant, but it is not robust enough for the temperature extremes the 6.0L can see. It will gel up and drop silicates out if metal skin temperatures get too high. I am concerned that you are experiencing this.
Interesting. So.....then what steps do I need to take now to determine that or to prevent that? If my new cooler is already getting clogged, is it toast? Does a chemical flush help me at all? I originally said it may have 3k miles on it, but that estimate is waaaaay high. Still, that's not a cheap repair.
Agreed, definitely not a cheap or an easy repair. If it is just gelled, it usually can be cleaned. Silicate (particulate) and especially rust solids are harder to get out,. Some people have had no luck at all with trying to chemically clean an "already plugged" oil cooler. Use "Restore" to clean out the gel. Restore Plus (or VC-9) is advertised to remove rust/scale, but many people have made things worse using this harsh cleaner.
You can try backflushing it. There are adapters that make that an easier job. When / if you do a backflush, collect the material backflushed to get an idea of what you are dealing with.
Interesting. So.....then what steps do I need to take now to determine that or to prevent that? If my new cooler is already getting clogged, is it toast? Does a chemical flush help me at all? I originally said it may have 3k miles on it, but that estimate is waaaaay high. Still, that's not a cheap repair.
I agree with Mark, in your type of usage you need to flush the Gold asap, and use Restore to remove as much of the silicate gel as possible (tons of info on this site about thorough flushing steps). I'm guessing if you look in your degas bottle, you'll see dropout deposits. With very little miles on the cooler, you might be able to stop the process in time and keep it serviceable. Can't comment about the effectiveness of back flushing, as I've not tried that, but have read conflicting reports. I went through the same issues with Gold (compliments of previous owner), and was able to stop further plugging. My delta has stayed solid at 9, so I can tolerate that, and live with a delta a couple points above optimum.
I was doing some thinking last night. We did my cooler in July of last year. I didn't do much pulling the rest of the year. But we did take about a 3 hour drive to a camp ground pulling my old travel trailer. The load was probably about 8k#. I didn't have my tuner at that point, but i was using the Torque app to monitor temps. I recall the EOT being hotter than normal to me, after just having a new cooler installed. So, the build up has been getting worse since then it seems.
I was doing some thinking last night. We did my cooler in July of last year. I didn't do much pulling the rest of the year. But we did take about a 3 hour drive to a camp ground pulling my old travel trailer. The load was probably about 8k#. I didn't have my tuner at that point, but i was using the Torque app to monitor temps. I recall the EOT being hotter than normal to me, after just having a new cooler installed. So, the build up has been getting worse since then it seems.
Many will use something like the CAT ELC( extended life coolant), others including myself use the Peak Fleet charge coolant.........both which have the SCA's already so no need to mess with those.
There are a few others I think but those two are pretty common.
I think Mark mentioned the reverse flush....might be worth looking into.
Was a proper flush done before the new cooler was installed?
There is a right way, and a wrong way to do that. The right way takes some work, and you actually drive the truck with the old cooler installed before you R and R with new if I'm not mistaken.
you do know that is a myth,85 6.9 idi,uses any anti freeze,motor oil,does not require any additives,the saying diesel engines running 500,000 miles came from idi engine,never a power stroke,idi was and still is the only engine to require mechanical service every 100,000 miles ,do some reading on the idi engine,glow plugs every 100,000 miles= $89,ip pump every 150,000 miles = $500,injectors every 300,000 $400,but most go alot longer than that,try that on your ps,remember the international idi engine is a commercial motor not a highway princess motor,just having alttle fun,,lol
Many will use something like the CAT ELC( extended life coolant), others including myself use the Peak Fleet charge coolant.........both which have the SCA's already so no need to mess with those.
There are a few others I think but those two are pretty common.
I think Mark mentioned the reverse flush....might be worth looking into.
Was a proper flush done before the new cooler was installed?
There is a right way, and a wrong way to do that. The right way takes some work, and you actually drive the truck with the old cooler installed before you R and R with new if I'm not mistaken.
I am willing to try any flush at this point! Might do them all, lol.
There was no flush done on my truck when we did the cooler. All we did was drain the system and put in new. I'm learning more about it now and sure wish we would have. I didn't know enough then. I got a coolant filter system for Christmas, so going forward that will sure help after a flush.
With what i've learned the last few days from you all and reading on here, this video makes perfect sense. One question I have, is if I do the flush with the Fleetguard and Restore, should or could I do this as well? Would you do this first or last? Using VC-9 is something different, so do I also do that in conjuction with Fleetguard or is this a competitor of Fleetguard? Sorry for the newb questions.
you do know that is a myth,85 6.9 idi,uses any anti freeze,motor oil,does not require any additives,the saying diesel engines running 500,000 miles came from idi engine,never a power stroke,idi was and still is the only engine to require mechanical service every 100,000 miles ,do some reading on the idi engine,glow plugs every 100,000 miles= $89,ip pump every 150,000 miles = $500,injectors every 300,000 $400,but most go alot longer than that,try that on your ps,remember the international idi engine is a commercial motor not a highway princess motor,just having alttle fun,,lol
Hopefully you don't give others the advice you can run any motor oil in a 6.9.......it calls for diesel rated oil.
The coolant does, in fact, call for SCA's, you are correct in the standard antifreeze works. That said everyone I have ever known with a 6.9/7.3 IDI runs something ELC with SCA's.
The 7.3 IDI did suffer from cavitation, correct there that the 6.9 did not have those issues.
I don't think anyone ever claimed the PSD coined the phrase "it runs 500,000 miles", that originated with the OTR trucking industry.
My apologies to the OP for hijacking this thread in my effort to clear some things up.
But Mike didn't you see that his International IDI is a commercial motor? Not a pavement princess like the defiantely not-commercial Navistar International VT365........
But Mike didn't you see that his International IDI is a commercial motor? Not a pavement princess like the defiantely not-commercial Navistar International VT365........
Thanks for the laugh! It must have been the old Stanadyne pump that propelled it to commercial status.........yeah, I'll go with that.
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