Recent Topics
WPA 3 Wireless Security Coming
by StevieC. 09/22/18 01:16 AM
Robo Calls/Telemarketers
by Nick1994. 09/22/18 12:47 AM
What oil should be used!
by BigShug681. 09/22/18 12:28 AM
VW Electronic Parking Brake
by StevieC. 09/21/18 11:48 PM
Leak Sealing and Mould Treatments?
by Ducked. 09/21/18 11:44 PM
UPS / FedEx / USPS
by StevieC. 09/21/18 11:21 PM
puncture repair question
by neo3. 09/21/18 10:55 PM
Can I use a 10 amp extension cord for...
by gregk24. 09/21/18 10:48 PM
In the unlikely event of a crash
by StevieC. 09/21/18 10:09 PM
Craigslist time wasters
by Anduril. 09/21/18 09:41 PM
Who runs a 20wt here?
by StevieC. 09/21/18 07:31 PM
Need help on edit profile
by jetmech1. 09/21/18 06:34 PM
Oil thickness on the dipstick
by Idlewild294. 09/21/18 05:40 PM
Chinese WIX Trans filter bad, let me down..
by jetmech1. 09/21/18 04:47 PM
Gen 8 Accord rear brakes-What tool?
by fdcg27. 09/21/18 04:30 PM
Ammeters?
by buck91. 09/21/18 03:55 PM
Need Help with Double D Knock Out Punch
by user52165. 09/21/18 03:41 PM
Newest Members
JRMFt11, Navyretired, aikwae, ScottRousell, Direct_Rejection
66036 Registered Users
Who's Online Now
28 registered members (2015Corolla, chance, ctechbob, Anduril, 4 invisible), 775 guests, and 36 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics290,810
Posts4,850,740
Members66,036
Most Online3,590
Jan 24th, 2017
Donate to BITOG
Previous Thread
Next Thread
Print Thread
Hop To
Page 1 of 2 1 2
Another successful Citric Acid flush #4530728
09/30/17 11:13 PM
09/30/17 11:13 PM
Joined: Aug 2006
Posts: 9,804
Central Washington
Colt45ws Offline OP
Colt45ws  Offline OP
Joined: Aug 2006
Posts: 9,804
Central Washington
Decided to give the citric acid flush a shot in my recently acquired 2003. My usual method is to drain and fill 3 or 4 times with not very good results usually.
What I started with.


After draining the coolant, I installed a dummy thermostat I cut the center out of, and a 3/8 NPT ball valve on the block drain to make it easier for me to open and close it all the time. I can only access the left side block drain unfortunately which leaves some of the capacity in it. Book capacity is 4.8Gal and after draining both taps I can get about 2.5 gallons back into it, the rest being in the heater core and right side of the block.
Then I flushed it for about 10 minutes with both drains open at 2500rpm. I didnt have a flushing Tee, I just stuck the hose into the coolant tank which seemed to work fine.
Closed the drains, dumped about 2 lbs of citric acid powder into in and filled it up. Closed the cap. I ran it for a bit more than 5 minutes, again at 2500rpm, at which point it was up to 190F and starting to spit out the coolant cap.
I ended up letting it sit for about 20 minutes while I ate dinner before I drained it.
Stuck the hose back in and filled it, ran it about 10 minutes at 2500 with the taps open again.
Then I let it idle while I dumped 10 gallons of distilled through it. I wanted the remaining water in the system to be distilled or close to it.
Removed the ball valve, reinstalling the plug and took out my dummy thermostat for a new one. I also popped a core plug and installed a block heater.


What was most impressive to me was it actually managed to clean the coolant tank. I thought I was going to have to replace it to be able to see through it again. But its fine. There isnt I huge amount of flow in there so I thought it wouldn't do a very good job.
To fill I added 2 gallons of straight G05 and then topped up with 50/50. I also added RMI while I was at it. Ill test the concentration later this week, but it should be in the ballpark.

Bonus shot of the inside of the block after I popped the core plug out. This was post flushing.



Last edited by Colt45ws; 09/30/17 11:19 PM.

-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Another successful Citric Acid flush [Re: Colt45ws] #4530747
09/30/17 11:51 PM
09/30/17 11:51 PM
Joined: Dec 2016
Posts: 6,230
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,230
Waco, TX
I would revoke your "man card" IMMEDIATELY for draining coolant into your used oil pan.

It actually [censored] to see that. You couldn't get another container?

Last edited by wwillson; 10/01/17 03:58 PM. Reason: bypassing censor
Re: Another successful Citric Acid flush [Re: Linctex] #4530752
10/01/17 12:06 AM
10/01/17 12:06 AM
Joined: Aug 2006
Posts: 9,804
Central Washington
Colt45ws Offline OP
Colt45ws  Offline OP
Joined: Aug 2006
Posts: 9,804
Central Washington
Originally Posted By: Linctex
I would revoke your "man card" IMMEDIATELY for draining coolant into your used oil pan.

It actually [censored] to see that. You couldn't get another container?


lol.
Thats my dedicated coolant container. Hence the green color. My oil one is black.

Re: Another successful Citric Acid flush [Re: Linctex] #4530758
10/01/17 12:19 AM
10/01/17 12:19 AM
Joined: Jan 2009
Posts: 6,197
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,197
New England
Originally Posted By: Linctex
I would revoke your "man card" IMMEDIATELY for draining coolant into your used oil pan.

It actually [censored] to see that. You couldn't get another container?


How dare you, Colt45ws. You know this kind of thing pisckses BITOGers off after they've had a few! crackmeup

Re: Another successful Citric Acid flush [Re: Linctex] #4530764
10/01/17 12:37 AM
10/01/17 12:37 AM
Joined: Sep 2014
Posts: 1,416
Seattle-ish, WA
Oro_O Online content
Oro_O  Online Content
Joined: Sep 2014
Posts: 1,416
Seattle-ish, WA
Originally Posted By: Linctex
I would revoke your "man card" IMMEDIATELY for draining coolant into your used oil pan.

It actually [censored] to see that. You couldn't get another container?

Maybe I am thinking you were trying to be funny but failed?

I have a similar container that oil and fluid goes in and I clean it out in between. I recall dad using it in the early '70s on the Chevys then, still the same container doing duty now. Did I fail to follow some unknown (to me) pattern and recycle it a decade ago to buy a Chinese one now? (Goak!)



Re: Another successful Citric Acid flush [Re: Colt45ws] #4530775
10/01/17 01:15 AM
10/01/17 01:15 AM
Joined: Aug 2006
Posts: 9,804
Central Washington
Colt45ws Offline OP
Colt45ws  Offline OP
Joined: Aug 2006
Posts: 9,804
Central Washington
He probably got confused from the filters in it, thinking they were oil filters. However, those are coolant filters from my other car. https://bobistheoilguy.com/forums/ubbthr...ilt#Post4389034

Last edited by Colt45ws; 10/01/17 01:16 AM.

-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Another successful Citric Acid flush [Re: Colt45ws] #4530792
10/01/17 01:53 AM
10/01/17 01:53 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
I have never had to use 2 pounds of an acidic cleaning product in my cooling system so I am not familiar with acceptable or recommended practices.

Plus I always use a T.

You mention, "Book capacity is 4.8Gal and after draining both taps you can get about 2.5 gallons back into it, the rest being in the heater core and right side of the block." So your vehicle leaves 2.3 gallons in the system? Almost half capacity? Are you sure a 10-gallon flush removes all that acidic solution?

Was the cooling system not working efficiently before.

BTW, I do like the color coded drain pans and green for coolant even more.


Multiple Diesel and Gasoline vehicles
Re: Another successful Citric Acid flush [Re: ArcticDriver] #4530799
10/01/17 02:07 AM
10/01/17 02:07 AM
Joined: Aug 2006
Posts: 9,804
Central Washington
Colt45ws Offline OP
Colt45ws  Offline OP
Joined: Aug 2006
Posts: 9,804
Central Washington
Originally Posted By: ArcticDriver
I have never had to use 2 pounds of an acidic cleaning product in my cooling system so I am not familiar with acceptable or recommended practices.

Plus I always use a T.

You mention, "Book capacity is 4.8Gal and after draining both taps you can get about 2.5 gallons back into it, the rest being in the heater core and right side of the block." So your vehicle leaves 2.3 gallons in the system? Almost half capacity? Are you sure a 10-gallon flush removes all that acidic solution?

Was the cooling system not working efficiently before.

BTW, I do like the color coded drain pans and green for coolant even more.


Before I flushed with the 10 gallons of distilled I first flushed with hose water. However many gallons went through it in the 5-10 minutes it was running with the hose stuck into the coolant tank. It was working fine, a little cool due to a lazy thermo. I just wanted to remove as much of that old rusty coolant I could and any deposits it left behind.

Last edited by Colt45ws; 10/01/17 02:10 AM.

-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Another successful Citric Acid flush [Re: Colt45ws] #4530829
10/01/17 03:22 AM
10/01/17 03:22 AM
Joined: May 2012
Posts: 5,380
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,380
Fort Lauderdale, FL
Oh yeah, you gave it what it needed. Nice!

Yes, the solution is also amazing st cleaning the tanks.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Another successful Citric Acid flush [Re: Colt45ws] #4530855
10/01/17 05:26 AM
10/01/17 05:26 AM
Joined: Jul 2005
Posts: 30,429
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,429
NY
Nice job. FTR my coolant container is green too. But it has seen an occasional oil change, only if two vehicles need an oil change the same day.


God Bless Our Troops

Re: Another successful Citric Acid flush [Re: Colt45ws] #4530874
10/01/17 06:42 AM
10/01/17 06:42 AM
Joined: Oct 2004
Posts: 7,974
Cincinnati, OH, USA
bullwinkle Offline
bullwinkle  Offline
Joined: Oct 2004
Posts: 7,974
Cincinnati, OH, USA
Heck, I have a green one of those for green antifreeze, and a yellow one for G-05/Premium Gold! And several of the covered black ones with the drain hole in the middle for oil.


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: Another successful Citric Acid flush [Re: Colt45ws] #4531002
10/01/17 09:43 AM
10/01/17 09:43 AM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline
Joined: Oct 2005
Posts: 7,094
Colorado
Originally Posted By: Colt45ws
Originally Posted By: Linctex
I would revoke your "man card" IMMEDIATELY for draining coolant into your used oil pan.

It actually [censored] to see that. You couldn't get another container?


lol.
Thats my dedicated coolant container. Hence the green color. My oil one is black.


Owned!

Re: Another successful Citric Acid flush [Re: Colt45ws] #4531026
10/01/17 09:58 AM
10/01/17 09:58 AM
Joined: Nov 2006
Posts: 19,915
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,915
MA, Mittelfranken.de
Looks great but for future reference try using baking soda in the rinse water to neutralize any remaining acid, 8 tablespoons per gallon system capacity should do it, do it twice then a clean water rinse without.
You got the amount close enough for your system 1.1lb for a 2.3 gallon cooling system is recommended by MB but on an older system with aluminum radiator and heater core I would probably use 1lb and do it twice if necessary after flushing it again with clear water just to keep the percent of acid lower. If the sytem has ever used a sealer like GM tabs, bars, etc do no flush it with acid, every leak will return possibly worse than it was originally.


ASE L1, Master. Deutsch Meisterbrief.
Re: Another successful Citric Acid flush [Re: Colt45ws] #4531029
10/01/17 10:03 AM
10/01/17 10:03 AM
Joined: May 2014
Posts: 1,232
Minnesota
philipp10 Offline
philipp10  Offline
Joined: May 2014
Posts: 1,232
Minnesota
What's the issue with using an oil drain pan for coolant? Just asking as I only have one pan and never gave it a thought.

Re: Another successful Citric Acid flush [Re: Colt45ws] #4531081
10/01/17 11:26 AM
10/01/17 11:26 AM
Joined: Aug 2004
Posts: 1,950
5600 feet elevation, Arizona
double vanos Offline
double vanos  Offline
Joined: Aug 2004
Posts: 1,950
5600 feet elevation, Arizona
Me neither! I clean my drain pan every time after use so I see no big deal at all...


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Page 1 of 2 1 2

BOB IS THE OIL GUY® Powered by UBB.threads™