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Old 06-12-2017, 09:32 AM   #651
Charlie-III
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Silver Sleeper BK, 5MT

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Quote:
Originally Posted by CalvinT View Post
You need to be sure they can handle engine oil pressure.

I'm pretty sure transmission fluid is run through at a lower pressure, maybe on return to the transmission sump.
True, another thing to consider.
Keep in mind, the cooling system will be pushing in on the "oil cooler" with about 16PSI.

As I stated before, depending on where you plumb it in, I would be concerned with the potential lack of flow through it.
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Old 06-23-2017, 03:25 PM   #652
chansdaman
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Default Good Experience with EBay Radiator

Just bought and installed a radiator from OPL (available on EBay, Amazon, and their own site) for $160. All aluminum, three row, good fitment, but had to trim the upper hose a little to clear the fan and the pulley. Model number is HPR078. Needed some bolts as well for the fans. All in all very pleased. 180F coolant temp while cruising. 10 year warranty is a bonus. My car is a bugeye with a hybrid swap.
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Old 06-23-2017, 03:38 PM   #653
chansdaman
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Here is what it looks like.

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Old 08-08-2017, 02:10 PM   #654
Freddy_WRX
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Default Coolant Temp Sensor Bad

I think my coolant temp sensor might be bad, the accessport won a normal day of driving will read anywhere from 220 to 240, but my gauge cluster needle will stay at the bottom for a while once I start driving then out of nowhere it will jump up to above the red or sit at 3/4 and not move.
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Old 08-08-2017, 03:44 PM   #655
Charlie-III
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Quote:
Originally Posted by Freddy_WRX View Post
I think my coolant temp sensor might be bad, the accessport won a normal day of driving will read anywhere from 220 to 240, but my gauge cluster needle will stay at the bottom for a while once I start driving then out of nowhere it will jump up to above the red or sit at 3/4 and not move.
Most ECT's have 2 circuits, one drives the gauge, one drives the ECU for fueling. Part can fail but look good on the other.
Cheap/easy is to replace the sensor.
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Old 08-19-2017, 11:06 PM   #656
RussianTiny
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So what's the popular coolant enhancer for the FA? I've used water wetter in the past with good results on a 50/50 mix. I know the enhancers work differently on DI engines.
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Old 08-26-2017, 05:35 PM   #657
CLL_OBP
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ST HM 0W20 191,425 mi

Default 2012 Impreza Coolant Replacement & Capacity FB20

I replaced the coolant late last night and wasn't expecting so much out of the radiator. The factory service manual shows the CVT models have an 8.2 quart capacity. I bought two gallon jugs of Valvoline Zerex 50/50 thinking I was going to do two drain and fills. If the capacity is what it is, one drain and fill replaced over 90% of the old coolant. The second picture is after disconnecting the lower hose. The short line above the 7 quart mark shows how much more was drained.




Last edited by CLL_OBP; 08-26-2017 at 08:33 PM. Reason: Replaced imaging host
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Old 09-03-2017, 10:31 AM   #658
MikeC5
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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 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 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. I have a new bottle of Subaru Coolant conditioner that I may or may not use along with 6 Star MLS head gaskets. I'm beginning to think any coolant that is compatible with aluminum engines will work and it was only because of the widespread HG problems with these engines that make it such a hot topic. Anyone using a commonly available brand with no ill effects?
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Old 09-04-2017, 01:26 AM   #659
CalvinT
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It's OK to mix the old and new coolants.

Subaru switched to the new (blue) coolant in 2008 starting with the WRX STi models. During the 2008 production run other models came with either the old (green), the new (blue) or a mixture of the two.

The May 2008 End Wrench issue discussed it. If you mix the two, you need to follow the replacement schedule for the old coolant.
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Old 02-12-2018, 02:26 AM   #660
nik790
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Does anybody know what concentration of coolant to distilled water the plant/factory uses to fill the cars before shipping them out? Curious if they just fill them up 50/50 or anticipate people topping up with water, or depends on the region they send it out to.
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Old 02-12-2018, 10:15 AM   #661
Charlie-III
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Quote:
Originally Posted by nik790 View Post
Does anybody know what concentration of coolant to distilled water the plant/factory uses to fill the cars before shipping them out? Curious if they just fill them up 50/50 or anticipate people topping up with water, or depends on the region they send it out to.
AFAIK, all are filled at 50/50, the OEM does not assume anything.
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Old 02-12-2018, 05:37 PM   #662
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Quote:
Originally Posted by nik790 View Post
Does anybody know what concentration of coolant to distilled water the plant/factory uses to fill the cars before shipping them out? Curious if they just fill them up 50/50 or anticipate people topping up with water, or depends on the region they send it out to.
It's probably 50%/50%, but you'd be safe anywhere from 40%/60% distilled water/antifreeze up to 60/40.
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Old 01-15-2019, 07:51 PM   #663
slashnul
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In my 07 Forester XT MT, if I drive aggressively, park, wait a few minutes, then restart the car, the engine runs rough for about 30 seconds. I suspect its temperature related. I have a BlueDriver OBD2 reader coming in the mail. Once I get it, what should I be monitoring? Oil temp and coolant temp, and anything else? TY
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Old 04-10-2019, 10:47 PM   #664
ohrearry
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Default Cooling System FAQ: Read if you want coolant information!

I recently did a coolant flush and fill as well as a themostat change on my 07 STi. Capacity in the manual says 7.6L~ which is more than 2 jugs of super blue coolant (3.78L each jug from dealer). I only got through 1 whole jug and 3/4 of the second jug of it until it stop accepting anymore coolant. I also added the subaru coolant conditioner. I am able to add little amounts after I let it cycle, but not much. I used a no spill funnel that burps the car as you're filling it with coolant.



My question is: should I be worried if its having trouble accepting the final jug of coolant?



Or continue to add little by little until its finally empty?

Last edited by ohrearry; 04-11-2019 at 11:02 AM.
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Old 04-11-2019, 02:17 PM   #665
car_freak85
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Did you measure how much coolant came out versus how much you put back in?
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Old 04-11-2019, 02:32 PM   #666
ohrearry
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Quote:
Originally Posted by car_freak85 View Post
Did you measure how much coolant came out versus how much you put back in?


I did not. I did notice my overflow reservoir is above the full mark by a little bit. Prior to refilling, it was about even with the full line on the reservoir.

When I did the flush I completely emptied the car of distilled water.
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Old 10-06-2019, 12:47 PM   #667
Lug_Nuts_23
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Silver

Default

Great FAQ. However, a few of the radiator brands listed at the top of the thread don't seem to exist anymore or at any rate their websites don't exist anymore.

ARC can't find any pages: http://www.arcinter.co.jp/
Blitz refuses to load: http://www.blitz-na.com
Gimmick also seems to be down: http://www.gimmickmotorsports.com
(Though I have found some Gimmick parts on other websites)

Does anyone have any new decent quality brands to add to the top of the thread for easy finding?
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Old 10-07-2019, 01:20 AM   #668
CalvinT
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I'd only use two brands, Subaru and Beck-Arnley.

https://www.beckarnley.com/parts/flu...life-blue.html

https://www.beckarnley.com/parts/flu...ncentrate.html

The Beck-Arnley website is useless for finding a dealer, but Google has several links including O'Relllys but you'll have to special order.
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