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Peak tutoral on radiator flushing is WRONG #4835889
08/09/18 09:15 PM
08/09/18 09:15 PM
Joined: Jan 2015
Posts: 640
missouri
ragtoplvr Offline OP
ragtoplvr  Offline OP
Joined: Jan 2015
Posts: 640
missouri
Here it is

https://peakauto.com/diy-hub/antifreeze/

After the cleaner there are 3 plain water flushes. So the system is 100% water at this point. Draining the radiator leaves a lot of pure water in the system. Then they filled it with 50 % pre-diluted coolant, resulting in a weak mix. Very weak. Will freeze and not have proper coolant protection.

the proper procedure is read the owners manual for cooling system capacity. If it 18 quarts, divide by 2 to get 9 quarts. This is how much pure coolant you add. If you can not get that much in, then you drain the overflow tank and fill it with the balance.

Inexcusable.

And the contact us link on the peak site does not work.

Rod

Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4835894
08/09/18 09:21 PM
08/09/18 09:21 PM
Joined: Mar 2012
Posts: 1,311
San Antonio, TX
E150GT Offline
E150GT  Offline
Joined: Mar 2012
Posts: 1,311
San Antonio, TX
That is why I refuse to use 50/50. Maybe on a newer car just doing a drain and fill with factory coolant but that’s it. I just did a distilled water flush on the Buick. I made sure not to buy 50/50 dexcool. By the way, I contacted valvoline about their Asian coolants only being 50/50. They said it was fine to flush and use 50/50 even though there is pure water in the block. I just told them I wouldn’t be purchasing their antifreeze. They also told me I could use dexcool in my Mazda.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4835902
08/09/18 09:29 PM
08/09/18 09:29 PM
Joined: Dec 2009
Posts: 755
Battle Creek, MI
SVTCobra Offline
SVTCobra  Offline
Joined: Dec 2009
Posts: 755
Battle Creek, MI
When I flush the radiator on my truck I do the same with doing the rinses with tap water. I add 50/50 coolant that I diluted myself. After I run the engine for a trip to town and back the leftover water and antifreeze is mixed. When I test the concentration it shows over 50% concentration.

I blame that on a faulty tester but point is it's not weak, plus if memory serves correctly a 50/50 mix is good to -35 F.


Think twice, speak once.
Re: Peak tutoral on radiator flushing is WRONG [Re: SVTCobra] #4835912
08/09/18 09:38 PM
08/09/18 09:38 PM
Joined: Jan 2015
Posts: 640
missouri
ragtoplvr Offline OP
ragtoplvr  Offline OP
Joined: Jan 2015
Posts: 640
missouri
this can not be true unless ALL the flush water drained out. I suppose there are cars where that happens, I have never owned one. Your description violates the laws of physics, and no one does that.

Sorry. Either you did a poor flush, or you have weak antifreeze.

Rod

Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4835923
08/09/18 09:44 PM
08/09/18 09:44 PM
Joined: May 2012
Posts: 1,550
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline
Joined: May 2012
Posts: 1,550
The land of USA-made Subies!
When I flush the Subaru, I pull the thermostat housing. Since it's conveniently located on the very bottom of the engine, it is nearly a complete drain. Then 50/50 antifreeze ends up really close to 50/50. It's a great design.

Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4835937
08/09/18 10:02 PM
08/09/18 10:02 PM
Joined: Jun 2003
Posts: 17,475
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,475
Deplorable in apple valley, ca
My customers don't understand this at all. They refuse to buy pure antifreeze,they only buy 50/50 which they add to the existing water and end up with only 25% antifreeze.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Peak tutoral on radiator flushing is WRONG [Re: Chris142] #4835943
08/09/18 10:12 PM
08/09/18 10:12 PM
Joined: Jan 2015
Posts: 640
missouri
ragtoplvr Offline OP
ragtoplvr  Offline OP
Joined: Jan 2015
Posts: 640
missouri
well, the bright side is you get to replace a lot of parts in the winter.

Rod

Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4835947
08/09/18 10:14 PM
08/09/18 10:14 PM
Joined: Jun 2012
Posts: 1,720
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,720
USA
Flush, drain, add 1 gal pure anti-freeze. Top off with 50/50. Never had a problem and always 20-30 below zero.


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4835953
08/09/18 10:24 PM
08/09/18 10:24 PM
Joined: May 2010
Posts: 9,169
North Carolina
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,169
North Carolina
On the second flush or third flush i measure how much i have to add to get the system filled. Subtract that from the published capacity and you know how much remains after draining. Then you know how much straight coolant to add to get to 50/50.


13 elantra 70k 5w30 QSUD
03 chevy avalanche79k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 5600 miles m1 0w30
Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4835961
08/09/18 10:37 PM
08/09/18 10:37 PM
Joined: Dec 2009
Posts: 755
Battle Creek, MI
SVTCobra Offline
SVTCobra  Offline
Joined: Dec 2009
Posts: 755
Battle Creek, MI
Originally Posted By: ragtoplvr
this can not be true unless ALL the flush water drained out. I suppose there are cars where that happens, I have never owned one. Your description violates the laws of physics, and no one does that.

Sorry. Either you did a poor flush, or you have weak antifreeze.

Rod


Most popular vehicle sold in the US is the Ford F-150. My owners manual for my 03 says the coolant capacity is around 25 quarts. When I changed it years ago, I used just shy of 4 gallons, so 19 quarts, leaving 5 quarts of water in the block after the flush. Half of 19 is 9.5 plus 5 quarts of water left over gives a 58/42 water/coolant mix.

According to a chart for Zerex G-05 a 40% coolant concentration is good to -15 F. I've had it colder than that and don't have a problem.


Think twice, speak once.
Re: Peak tutoral on radiator flushing is WRONG [Re: SVTCobra] #4835964
08/09/18 10:41 PM
08/09/18 10:41 PM
Joined: Nov 2004
Posts: 1,811
SD
zrxkawboy Offline
zrxkawboy  Offline
Joined: Nov 2004
Posts: 1,811
SD
Originally Posted By: SVTCobra
My owners manual for my 03 says the coolant capacity is around 25 quarts. When I changed it years ago, I used just shy of 4 gallons, so 19 quarts, leaving 5 quarts of water in the block after the flush.


Just shy of 4 gallons would be about 15 quarts, leaving 10 quarts (2.5 gallons) of water.


"Think of all the Ford owners who will someday want an automobile." John Dodge

Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4836052
08/10/18 05:53 AM
08/10/18 05:53 AM
Joined: Oct 2008
Posts: 12,478
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,478
The Old North State
For simple rad d&f, should have stopped before adding the cleaner, just filled using the 50/50 mix. Once he added the cleaner and circulated, full strength AF then required and as noted fill to half system capacity with AF and top with distilled. I likely would have used distilled water for complete flush series, at least last two flushes. Looks like Joe Thomas needs someone to inform him why his procedure is incorrect, and Peak should take it down.

As for contact, don't know about now but in past always been responsive to my inquiries using that contact method.

Re: Peak tutoral on radiator flushing is WRONG [Re: Sayjac] #4836091
08/10/18 07:03 AM
08/10/18 07:03 AM
Joined: Aug 2010
Posts: 5,727
Champlain/Hudson Valley
Kira Offline
Kira  Offline
Joined: Aug 2010
Posts: 5,727
Champlain/Hudson Valley
To Sayjac: You said, "As for contact, don't know about now but in past always been responsive to my inquiries using that contact method."

You're right but the OP's communication wasn't in the "page of responses" given to the monkey to reference. Also, since his communication was a criticism/correction he probably erased it to avoid being the bearer of bad news.

Re: Peak tutoral on radiator flushing is WRONG [Re: ragtoplvr] #4836117
08/10/18 07:39 AM
08/10/18 07:39 AM
Joined: Mar 2015
Posts: 5,147
Glendale, Arizona
billt460 Offline
billt460  Offline
Joined: Mar 2015
Posts: 5,147
Glendale, Arizona
My biggest argument with 50/50 premix antifreeze, is it's a total rip off when compared to the full concentrate. I can't believe anyone would be foolish enough to buy it. But they line up to. 50/50 premix of standard Prestone runs $8.88 at Wal-Mart. While the 100% concentrate is only $10.87. Or just $1.99 more for twice as much pure antifreeze.

https://www.walmart.com/ip/Prestone-Extended-Life-Prediluted-Antifreeze-Coolant/16879961

https://www.walmart.com/ip/Prestone-Extended-Life-Antifreeze-Coolant-1-Gallon/16879960

Re: Peak tutoral on radiator flushing is WRONG [Re: billt460] #4836203
08/10/18 08:58 AM
08/10/18 08:58 AM
Joined: Oct 2012
Posts: 4,765
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,765
Taiwan
Originally Posted By: billt460
My biggest argument with 50/50 premix antifreeze, is it's a total rip off when compared to the full concentrate. I can't believe anyone would be foolish enough to buy it. But they line up to. 50/50 premix of standard Prestone runs $8.88 at Wal-Mart. While the 100% concentrate is only $10.87. Or just $1.99 more for twice as much pure antifreeze.

https://www.walmart.com/ip/Prestone-Extended-Life-Prediluted-Antifreeze-Coolant/16879961

https://www.walmart.com/ip/Prestone-Extended-Life-Antifreeze-Coolant-1-Gallon/16879960


Never seen 100% here and I doubt its available.

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