OBS with ELC coolant - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 16 (permalink) Old 04-25-2017, 08:28 PM Thread Starter
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OBS with ELC coolant

I've been running the typical green coolant and SCA's for the last few years. A couple days ago though the heater hose became worn out enough that it was cut by the serpentine belt. Now's the time to replace the rest of the radiator hoses before anything major happens.

What's the status of running Cat compliant ELC coolant in an obs 7.3? After a lot of research, it seems everyone has a different opinion whether it's alright. Some say it eats gaskets and the injector cups and that it shouldn't be run in the early 7.3's. Others say it's alright and just be sure to flush all of the old coolant out of the engine. I like the idea of not having to mess around with the SCA's anymore since not even my dealer has it in stock most of the time. Nor have I found precharged coolant at the auto parts places in my area.

Thanks for the help.
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post #2 of 16 (permalink) Old 04-25-2017, 08:37 PM
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Re: OBS with ELC coolant

Elc eats the glue for the injector cups. I wouldn't run it. Unless you change your cups.

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post #3 of 16 (permalink) Old 04-25-2017, 08:41 PM
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Re: OBS with ELC coolant

^What he said, but I wonder how long that takes to eat through? I've been running the Chevron ELC in my truck for the last 8 years and I still haven't had an issue.

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post #4 of 16 (permalink) Old 04-25-2017, 08:46 PM
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Re: OBS with ELC coolant

I've been running the CAT elc for 6 years but it is time for the coolant flush and typical replacement of cooling system items and will be going back in with Deere cool gard. It is an obs truck.

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post #5 of 16 (permalink) Old 04-25-2017, 10:46 PM
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Re: OBS with ELC coolant

I flushed mine completely and went with RMI-25, low silicate green antifreeze, and a coolant filter. Already changed the filter twice in 1500 miles and they were both full of nasty stuff. With the RMI-25 you won't need additives or test strips.

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post #6 of 16 (permalink) Old 04-26-2017, 04:21 AM
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Re: OBS with ELC coolant

I just bought the fleetcharge from Napa, it already has the SCA in it and it was like $9 a gallon or something. I might want to test it though to be sure, I never have since I put the new motor in...


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post #7 of 16 (permalink) Old 04-26-2017, 04:38 PM
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Re: OBS with ELC coolant

Was that ^^^^^^ price for full strength or 50/50 diluted?
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post #8 of 16 (permalink) Old 04-27-2017, 01:40 AM
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Re: OBS with ELC coolant

That was 50/50 diluted. Since it was a brand new motor and everything was completely dry, i didnt want to try and screw with measuring out the coolant and distilled water, or have to go buy distilled water for that matter lol.


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1996 Cali F350 CCFB, 7.3 PSD, 2wd SAS, w/ 380,000 miles.
New Motor at 352,000, DieselSite Legendary Trans at 356,000 and many more
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post #9 of 16 (permalink) Old 04-27-2017, 04:30 AM Thread Starter
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Re: OBS with ELC coolant

Quote:
Originally Posted by joedown View Post
^What he said, but I wonder how long that takes to eat through? I've been running the Chevron ELC in my truck for the last 8 years and I still haven't had an issue.
So this is the response that I've run into a lot. Does anyone have a clue how long it actually takes for the ELC to eat through the sealant? I've read of people using ELC for ten plus years with no problems.

How hard is it to change the cups? I've thought about getting larger injectors in a couple years as well so I'd already be in the area.

Thanks for the responses. You guys are awesome.
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post #10 of 16 (permalink) Old 04-27-2017, 04:43 AM
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Re: OBS with ELC coolant

I'm kinda new to the diesel world so please forgive my ignorance, but with a product like RMI-25, why would you bother to mess with anything else????

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KC TP38R, CNC Fab Bellowed Up-Pipes, Full Force Stg 1 injectors, 3" DP, 4" exhaust, CNC Fab HPOP, Mark F E-Fuel, 7.3 Intercooler, 1.0 Exhaust Housing, TS Chip, remote coolant filter, and VB.
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