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Another Subaru Coolant question.... #4508001
09/05/17 11:03 AM
09/05/17 11:03 AM
Joined: Mar 2008
Posts: 7
Eastern CT
MikeC5 Offline OP
MikeC5  Offline OP
Joined: Mar 2008
Posts: 7
Eastern CT
So I replaced head gaskets and am looking for coolant for my 2002 Legacy and my local Subaru dealer no longer carries the Subaru coolant for the older models. I've done a ton of internet searches and have found 2 or 3 other brands recommended (Peak Global, Zerex Asian, Beck Arnley) but none of them are locally available (in concentrate)and I hate the idea of having to pay for shipping on something like this. I did find Zerex Asian locally but only in the 50/50 mix (which will cost about 80% more to do a complete re-fill since you have to buy 2 bottles!).
My (old) Subaru Long Life coolant (deep green) bottle spells out the ingredients; Ethylene Glycol, Diethylen Glycol, Soduim Benzoate and Potassium Hydroxide (and water, even though it is a concentrate). I see many other brands out there with the first two main ingredients and have to wonder if any of those will suffice (these are HOAT, if I understand correctly). I saw in a previous thread mention of Pep Boys OEM coolant and they do specifically mention it is OK for Subarus of this era. However, it also says it is borate-free. Is the missing borate something to worry about? I have a new bottle of Subaru Coolant conditioner that I may or may not use along with 6 Star MLS head gaskets.
At least I'm not too far from a Pep Boys...

Re: Another Subaru Coolant question.... [Re: MikeC5] #4508010
09/05/17 11:14 AM
09/05/17 11:14 AM
Joined: May 2009
Posts: 12,189
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,189
N.H, U.S.A.
Just use a short life "classic " coolant and change every 3 years ? That way no thinking about Hoat, Oat, old Goats and Moats.

I'm sure a long life coolant expert will chime in. I am NOT a self-proclaimed coolant "forum expert" on coolant.

Got any Hi-Fi questions instead?


2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: Another Subaru Coolant question.... [Re: MikeC5] #4508017
09/05/17 11:19 AM
09/05/17 11:19 AM
Joined: Dec 2003
Posts: 9,800
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,800
Florida, Cape Coral
Zerex Asian will work very well. Ed


CX5 Touring 2.5L :-)
Re: Another Subaru Coolant question.... [Re: MikeC5] #4508018
09/05/17 11:20 AM
09/05/17 11:20 AM
Joined: Jan 2016
Posts: 29
Bothell, WA
Todari09 Offline
Todari09  Offline
Joined: Jan 2016
Posts: 29
Bothell, WA
I did replace the head gaskets on EJ253 engine on my 2006 Subaru Impreza about 2 years ago.
I just filled it up with Supertech coolant.

Re: Another Subaru Coolant question.... [Re: MikeC5] #4508030
09/05/17 11:31 AM
09/05/17 11:31 AM
Joined: Dec 2008
Posts: 3,079
Occupied Virginia
Bottom_Feeder Offline
Bottom_Feeder  Offline
Joined: Dec 2008
Posts: 3,079
Occupied Virginia
I used Peak Global in my 2001 Impreza but that was years ago. Research at the time said that was a decent alternative. Not sure what's changed since then.

Re: Another Subaru Coolant question.... [Re: MikeC5] #4508032
09/05/17 11:34 AM
09/05/17 11:34 AM
Joined: Oct 2008
Posts: 12,471
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,471
The Old North State
I recommend PepBoys OEM brand Asian Concentrate, pick your tint, green available. All PB OEM tints the same. If no PB b&m store nearby [email protected] has it currently for $17.67 delivered to your door. Not bad when you consider the premixes would have to be ~$9 to equal, and concentrate AF much easier to use/refill with system flush, and some distilled.

Other option Peak Global Lifetime Full Strength if you can find it available from local Napa. I'm using it in my Tacoma almost 4 years now.

Re: Another Subaru Coolant question.... [Re: MikeC5] #4508037
09/05/17 11:46 AM
09/05/17 11:46 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Prestone Dexcool is good stuff and has a florescent orange color.

Re: Another Subaru Coolant question.... [Re: MikeC5] #4508058
09/05/17 12:18 PM
09/05/17 12:18 PM
Joined: Aug 2008
Posts: 3,155
USA
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,155
USA
Is the important thing the chemistry or the color? Because color means absolutely nothing.

Re: Another Subaru Coolant question.... [Re: Eddie] #4508073
09/05/17 12:41 PM
09/05/17 12:41 PM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
Originally Posted By: Eddie
Zerex Asian will work very well. Ed


Seems pretty close. Only missing the KOH.

Lots of coolant info/research here

If you do change, get rid of as much of the old stuff as feasible.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Another Subaru Coolant question.... [Re: Merkava_4] #4508086
09/05/17 12:55 PM
09/05/17 12:55 PM
Joined: Dec 2008
Posts: 3,079
Occupied Virginia
Bottom_Feeder Offline
Bottom_Feeder  Offline
Joined: Dec 2008
Posts: 3,079
Occupied Virginia
Originally Posted By: Merkava_4
Prestone Dexcool is good stuff and has a florescent orange color.

I wouldn't put DexCool in anything that doesn't specifically call for it.

Re: Another Subaru Coolant question.... [Re: 69GTX] #4508092
09/05/17 01:01 PM
09/05/17 01:01 PM
Joined: May 2012
Posts: 1,345
Winchester, Indiana
SubieRubyRoo Offline
SubieRubyRoo  Offline
Joined: May 2012
Posts: 1,345
Winchester, Indiana
Originally Posted By: 69GTX


If you do change, get rid of as much of the old stuff as feasible.


Subaru EJ25s are actually quite easy to get everything out... the thermostats are on the bottom of the engine; so just pull the two bolts out of the housing, pull down, and stand back. This will drain everything in the radiator and engine block. Then be sure to change the thermostat and housing gasket with OEM. You can find both on eBay new for about $17, look for the seller 'barn find bernie'.

Re: Another Subaru Coolant question.... [Re: MikeC5] #4508112
09/05/17 01:23 PM
09/05/17 01:23 PM
Joined: Jun 2008
Posts: 16
PA
waltb Offline
waltb  Offline
Joined: Jun 2008
Posts: 16
PA
I have used both Peak Global (purchased from the local NAPA store) and the Zerex Asian 50/50 (from Walmart) in my Subaru over the years. The Peak Global worked fine for 200k+ miles and two changes. Presently after the last timing belt change I am using the Zerex Asian since it was easier to get and it seems to work fine so far.

With the already iffy head gaskets in the older EJ engines I would try to use an Asian POAT formula. Oh as someone else mentioned the EJ engines are very easy to flush out since the thermostat is the lowest point in the engine.

WB

Re: Another Subaru Coolant question.... [Re: Bottom_Feeder] #4508132
09/05/17 01:44 PM
09/05/17 01:44 PM
Joined: Oct 2008
Posts: 12,471
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,471
The Old North State
Originally Posted By: Bottom_Feeder
....I wouldn't put DexCool in anything that doesn't specifically call for it.
+1

No reason imo to use Dex or universal clone containing 2eha with the many reasonably priced readily available aftermarket Asian PHOATs, premixes or PB OEM concentrate. Latter preferable to paying for half water. Walmart now sells Valvoline Asian vehicle same as ZAF but generally less expensive. However like ZAF, a premix only available in red/pink tint.


Re: Another Subaru Coolant question.... [Re: Sayjac] #4508144
09/05/17 02:05 PM
09/05/17 02:05 PM
Joined: Mar 2008
Posts: 7
Eastern CT
MikeC5 Offline OP
MikeC5  Offline OP
Joined: Mar 2008
Posts: 7
Eastern CT
Thanks Guys. I would like to try the Zerex Asian but can only find it in 50/50. I think I'm going to go ahead and give the Pep Boys OEM stuff a try. The motor is dry inside now and I'm changing all hoses. I'll flush the heater core and rad and will be 99.9% clean....

Re: Another Subaru Coolant question.... [Re: Todari09] #4508226
09/05/17 04:20 PM
09/05/17 04:20 PM
Joined: Dec 2012
Posts: 605
Washington for now
WhyMe Offline
WhyMe  Offline
Joined: Dec 2012
Posts: 605
Washington for now
Originally Posted By: Todari09
I did replace the head gaskets on EJ253 engine on my 2006 Subaru Impreza about 2 years ago.
I just filled it up with Supertech coolant.


i just use ST in my 99 OB . never had issues

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