thoughts on coolant flush
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5th Wheeling
Joined: Sep 2006
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thoughts on coolant flush
Hello everyone , I am curious about a coolant flush . I Know this subject has been beat to death.
I am a first time diesel owner and I am about to do a coolant flush. the truck is an 2007 f250 6.0 lariat c/c two wheel drive .
I bought the truck about 2 years ago ,to help my son move to hollowman afb. in nm. the truck did great . it has almost 120,000
mi. on it I have and use torque pro app , and my delta is around 11.2 at 70 mph and about 85 outside totally empty . I have been reading
a lot of posts on this . I am going to do a vc-9 flush then remove the thermostat for the rest of the flush procedure , followed by a oil cooler
backflush , heater core backflush , and radiator flush . I would like to know if anyone has done a coolant flush then a oil cooler backflush
before filling the cooling system . if so how successful was it. should I consider replacing the oil cooler thanks in advance .
I am a first time diesel owner and I am about to do a coolant flush. the truck is an 2007 f250 6.0 lariat c/c two wheel drive .
I bought the truck about 2 years ago ,to help my son move to hollowman afb. in nm. the truck did great . it has almost 120,000
mi. on it I have and use torque pro app , and my delta is around 11.2 at 70 mph and about 85 outside totally empty . I have been reading
a lot of posts on this . I am going to do a vc-9 flush then remove the thermostat for the rest of the flush procedure , followed by a oil cooler
backflush , heater core backflush , and radiator flush . I would like to know if anyone has done a coolant flush then a oil cooler backflush
before filling the cooling system . if so how successful was it. should I consider replacing the oil cooler thanks in advance .
Fleet Owner
Joined: Nov 2003
Posts: 27,901
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What coolant is currently in it?
Why do you feel it is necessary to use VC-9? It is an acidic cleaner. Your temperature differential is not great but ok.
Have you verified that the coolant and oil temps are reading accurately?
Why do you feel it is necessary to use VC-9? It is an acidic cleaner. Your temperature differential is not great but ok.
Have you verified that the coolant and oil temps are reading accurately?
Thread Starter
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5th Wheeling
Joined: Sep 2006
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as far as I can tell the coolant is ford premium gold . as for the eot and the ect temps they appear to be correct using
the torque pro app with the elm 327 obd2 scanner . and as for the vc-9 I was going to use it due to all the other post I've read.
the torque pro app with the elm 327 obd2 scanner . and as for the vc-9 I was going to use it due to all the other post I've read.
Fleet Owner
Joined: Nov 2003
Posts: 27,901
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Do the coolant, oil, transmission, and IAT 1&2 all read pretty close to each other on a cold engine (after sitting for 10-12 hours).
My opinion is to not use VC-9 unless you have to. Others may feel differently.
My opinion is to not use VC-9 unless you have to. Others may feel differently.
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5th Wheeling
Joined: Sep 2006
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ok thanks bismic . I was planning on doing an oil change with oil filter and both fuel filters , along with a trans fluid drain and fill with external filter change..
for the IAT 1&2 is that with koeo or right after it starts
for the IAT 1&2 is that with koeo or right after it starts
Fleet Owner
Joined: Nov 2003
Posts: 27,901
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A water backflush of the oil cooler wouldn't hurt. Be sure to get enough distilled water flushes that you leave MOSTLY distilled water in the engine. The whole system holds about 7 gallons, and at best (w/ block drains open and the lower hose off) you will drain about 3.5 gallons. There is a lot of "hold up" in the system.
After you have thoroughly flushed w/ distilled water, you need to add 3.5 gallons of concentrated coolant (100% coolant) and then top off with distilled water.
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5th Wheeling
Joined: Sep 2006
Posts: 26
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ok I was going to get about 30 gallons of distilled water, and get all the other supplies at rockauto .
the local steelership wanted about 18.00 a gal . for the coolant and 7.00 qt for lv trans fluid.
the local steelership wanted about 18.00 a gal . for the coolant and 7.00 qt for lv trans fluid.
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Fleet Owner
Joined: Nov 2003
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Don't go back in w/ Ford Gold coolant, get an EC-1 rated ELC coolant. That is a MUCH better choice,
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Fleet Owner
Joined: Nov 2003
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Is that close to ambient (91 dgrees)?
What I use isn't readily available (Shell Rotella Ultra). Most people use the Red Rotella ELC. Nitrite-free is getting to be the most common and will work well.
https://rotella.shell.com/en_us/prod...e-coolant.html
If/when I change, I will probably go to a Caterpillar store and get their ELC coolant.
https://puredieselpower.com/products...-52388647.html
What I use isn't readily available (Shell Rotella Ultra). Most people use the Red Rotella ELC. Nitrite-free is getting to be the most common and will work well.
https://rotella.shell.com/en_us/prod...e-coolant.html
If/when I change, I will probably go to a Caterpillar store and get their ELC coolant.
https://puredieselpower.com/products...-52388647.html
More Turbo
Joined: Jan 2017
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I to run G03 and plan to switch to the red. Ordering the back flush kit this weekend. Deltas have never been above maybe 9.