Coolant flush, what coolant to put back in - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 6 (permalink) Old 03-17-2018, 03:11 AM Thread Starter
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Coolant flush, what coolant to put back in

After reading lots of different information, I have come to the conclusion that I should refill my 1997 7.3 with motorcraft green vc5 coolant and add two or three bottles of vc8 additive. Does this sound correct? A reputable diesel shop nearby swore that I would be ok using an ELC coolant without sca for my year 7.3 but I have read about injector cup issues caused by this. Options?
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post #2 of 6 (permalink) Old 03-17-2018, 01:00 PM
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Re: Coolant flush, what coolant to put back in

Pre 99 you don't want to use ELC coolant, you want to use conventional green coolant and put a SCA additive in to keep from cavitating. I just use the motorcraft VC8 additive.
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post #3 of 6 (permalink) Old 03-18-2018, 04:45 AM
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Re: Coolant flush, what coolant to put back in

Use green coolant with additives for obs. Elc is not compatible with the older seals especially the injector cups.

Now here is the caveat: others have used elc coolant in their obs and nothing has happened (longest Iíve read was 8yrs).

The final solution? Use the green coolant with additive.


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post #4 of 6 (permalink) Old 03-18-2018, 06:03 AM
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Re: Coolant flush, what coolant to put back in

Quote:
Originally Posted by Jeremyd86 View Post
Pre 99 you don't want to use ELC coolant, you want to use conventional green coolant and put a SCA additive in to keep from cavitating. I just use the motorcraft VC8 additive.
Quote:
Originally Posted by ​ DieselDC View Post
Use green coolant with additives for obs. Elc is not compatible with the older seals especially the injector cups.

Now here is the caveat: others have used elc coolant in their obs and nothing has happened (longest Iíve read was 8yrs).

The final solution? Use the green coolant with additive.


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The factory said to use on an OBS the low silicate green stuff not the regular green stuff used in autos. About 4 pints of the SCA additive with a complete block flush first. Just draining the radiator does not drain the block.
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post #5 of 6 (permalink) Old 03-18-2018, 04:34 PM
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Re: Coolant flush, what coolant to put back in

Here is a good write up of a coolant flush. The links in it might be bad but the information is still valid.

96 F250 XLT 4x4, 4:10 gears, 5 speed, Tymar intake and HX hose, downpipe, pyro and boost guages, coolant filter, Luc clutch
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post #6 of 6 (permalink) Old 03-19-2018, 04:57 PM Thread Starter
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Looks like the green ford vc 5 is what I will use! Thanks for all the input guys!!
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