Several have posted that following a coolant flush, that their degas puking issue was eliminated. Several more have posted that Ford's VC-9 flush results in charcoal black fluid coming out of the petcock.

Question: Is it likely (or even possible) that draining out all your old coolant, refilling with distilled a few times, and then refilling with distilled but adding VC-9 in with it for a flushing round actually removes the beginnings of the plugging of the EGR cooler? What about running VC-9 through twice - any harm done?

 

That is definably possible.

Suppose the oil / egr cooler is slightly plugged, it enters progressive death as coolant flow goes lower and lower, and as it does so, deposits build up in both coolers as coolant "flash off".

It would happen first in the EGR, then the oil cooler.

VC-9 will remove the deposits --- it is incredibly potent commercial grade boiler cleaner.

As the deposits are removed, the coolant flow is restored, and the "flash" and with that, excess pressure / steam generated from the system is stopped.

Good diagnosis, good hypothesis.

The physics support your analysis.

Too many people rush to dump EGR / Oil coolers before the diagnosis and cheap fixes are exhausted.

Or go right ahead to do ARPs....

 

I just got a Scangauge and saw my EOT up to 14° warmer than my ECT on a 77° day not pulling anything. Time to pick up the VC-9, distilled water, and ELC.

 

not to scare ya but some have done a flush and plugged there oil cooler

the oil cooler is a great filter

check that thread where he reversed flushed the oil cooler it may work for you


I dont think it will work for everyone but yours might not be that far gone yet

get a coolant filter on it if you dont already

make shure oil cooler didnt get worse before you dump the ELC in

 

not to hyjack but im about to do the flush also being that upper radiator hose is leaking and the gummy stuff was stuck to the fan shroud. (runnin green at the moment) but when does the vc-9 go in. do i put it in now before i start the flush or drain it and then put it in and add water? also what coolant should i use. i was told cat coolant but dont really want that bill there price is high!

 

drain antifreeze first then do vc-9 with water

check my coolant in sig like 23.00 a gallon full strength

any ELC cat ec-1 rated thats why they make rating so we dont have to worrey about diffrent brands coolant they all test the same in a lab

 

There's a link to the procedure in the tech folder.

 

will the prestone stuff work? it is the stuff in gray bottle and it says extended life on it

 

as long as it says CAT EC-1 RATED ELC [extended life coolant]

 

awesome thanks for the info!

 

101-2844 Cat EC-1 Extended Life Coolant - 1 Gallon | Lazzara PartsXpress

this stuff should work right?

 

FWIW the coolant in my sig Final Charge is also silicate free

bonus no silicate to drop out of suspension and goo the oil cooler up

I can only vouch for the Final Charge but all ELCs maybe the same IDK

 

it has the cat ec-1 rating looks good to me

FWIW it did have low silicate compared to Final charge was silicate free

some have said the high heat causes silicate dropout

the ford gold was probably full of silicates

Id go with it youl be fine

 

where can you get the Final Charge at? only thing that has anything around here i think is napa everyone else carries the 50/50 mix

 

I had it ordered in from checker auto parts

it was good to 600,000mi just needs an aditive at 300,000

the coolant you posted said something about an additive after awhile to

they look the same except one was low silicate and one was silicate free thats all I picked up on anyway

Im shure it will be ok either one is better than green coolant