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Old 12-16-2012, 10:14 PM   #1
Hinz.Richard
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Default 06 WRX Cooling Problem

06 WRX
Mods
forged short block 10k miles ago
new oem head gaskets 10k miles ago
pressure checked/plained heads 10k miles ago
ARP Head studs 10k miles ago
Crawford AOS just now
OEM Water Pump 10k miles ago w/oem coolant
OEM thermostat 10k miles ago
Perrin FMIC
Rotated 30r w/ supporting fuel mods

So recently im beginning to have alot of problems with my car wanting to get hot. It seems to do it after driving around for a little while like say 15 min. Seems to do it most on highway driving doesnt get hot when just idling. Ive never let it get passed the upper acceptable range line without pulling over and shutting it off also.

So things ive checked
Cumbustion Check was just fine
Pressure checked radiator held 12-14psi fine
Made sure Coolant was full
Tried burping it now multiple times with no spill funnell no bubbles and wont get hott tried letting it run for over 15 min.
Both fans are coming on when it starts getting hot.

Does anyone have any other ideas im getting really confused and frustrated. I have no idea what to try next. I hope its not getting to hot to warp/crack a head or blow a head gasket since its only getting to that second acceptable range line and no higher but im beggining to get afraid to drive it.
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Old 12-16-2012, 10:39 PM   #2
Hinz.Richard
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So just went for a ride to log and that top acceptable line would read about 208F does that sound about right? Thats not hot enough to harm anything correct?
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Old 12-16-2012, 10:41 PM   #3
mod maniac
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Correct!
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Old 12-16-2012, 11:20 PM   #4
Hinz.Richard
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I still dont get what else I can do aside from just replacing the thermostat but I dont really think thats it I mean its brand new from the dealership thatd just seem odd to go bad that quickly.
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Old 12-18-2012, 04:38 AM   #5
oguitar
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Are there any leaves or something blocking the airflow to the radiator?
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Old 12-18-2012, 09:36 AM   #6
Leafy
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Do you still have the factory under tray? Did you get some junk stuck between the fmic and the rad?
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Old 12-18-2012, 11:38 AM   #7
myblusti
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cooling mods? anything other than stock? with more power typically comes more heat. and you have added a fmic so you are now restricting airflow to the radiator. some things you could do

1 - low temp thermostat
2 - check your thermo to make sure its opening at the proper temp. (use a pan of water, thermometer and your theremostat.)
3 - upgrade the radiator
4 - run some fal fans.
5 - flush your coolant system and run 3-4 bottles of water wetter in your system.

try some of those. i had over heating issues in my rb swapped 240. these should cool you down.
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Old 12-18-2012, 06:24 PM   #8
Hinz.Richard
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I dont have that bottem trey but everything is still really clean no blockage. I may have figured it out somehow tho my 1.3 bar cap got switched onto my radiator rather than the upper reservoir where its supposed to be. Switched it last night and it wasnt wanting to get hot anymore. However I do think after the new year I will invest in a good aluminum radiator and add some water wetter at the same time just to avoid further issues and to hopefully keep it a little cooler.
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Old 12-18-2012, 07:33 PM   #9
Leafy
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Put your stock under tray back on and it will stop over heating on the highway.
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Old 12-18-2012, 07:52 PM   #10
Hinz.Richard
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Yea im gonna put that on tonight if i can find all the right bolts. Does it matter also i have just the open scoop since i have a fmic? I read somewhere itll make it get hot but I just dont understand how at all that would matter.
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Old 12-19-2012, 01:32 AM   #11
Hinz.Richard
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Well scratch that it got hot yet again on the way home tonight ugh im really baffled as what to do next. It seems fine like when your just cruising but if you start going up a hill it just starts rising.
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Old 12-19-2012, 08:28 AM   #12
Leafy
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Quote:
Originally Posted by Hinz.Richard View Post
Yea im gonna put that on tonight if i can find all the right bolts. Does it matter also i have just the open scoop since i have a fmic? I read somewhere itll make it get hot but I just dont understand how at all that would matter.
that could effect it too. To get airflow through the radiator you need high pressure in front of it and low pressure behind it. The under tray helps create low pressure and since the same effect works with the top mount, not having a top mount also increased your under hood pressure. The under tray is just an easy one to cross off the list though when the symptoms are overheats on the highways but not idling.
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Old 12-28-2012, 01:07 PM   #13
Hinz.Richard
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So an update it now seems to only get hot if im doing 45-60 mainly once I get to a hill. If im on the highway 65 and up its fine, threw town 0-40 its fine, idle its fine. So far I put the plastic bottem piece back on. I also took out my thermostat and checked it in a pot of 170-180 degree water and it opens all the way just fine also added water wetter so idk im baffled.
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Old 12-28-2012, 09:17 PM   #14
Hinz.Richard
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Figured out today if u rev it up a few times it drops back down also i dont know if that helps with anything.
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Old 12-29-2012, 10:13 AM   #15
Leafy
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Quote:
Originally Posted by Hinz.Richard View Post
Figured out today if u rev it up a few times it drops back down also i dont know if that helps with anything.
How old is the water pump? You have the weirdest combination of cooling system symptoms.
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Old 12-29-2012, 12:39 PM   #16
Hinz.Richard
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Its pretty much brand new got it from the dealership when I did everything else.
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Old 01-05-2013, 01:17 AM   #17
Hinz.Richard
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Well im beginning to think its a blockage in the cooling system somewhere being as I can rev it up and the temp will drop back down. So it must not be completely blocked but more just slows flow down. Ive read some things about the subaru conditioner which I used of people saying it clogged their radiator or heater core. Is there anyway I can figure out if it has put a blockage of some sort somewhere?
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Old 01-20-2013, 11:48 PM   #18
Hinz.Richard
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This is still happening any ideas? All I can think of is just buy a new radiator and see if that fixes it but I really dont want to spend the money and that not be it.
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Old 03-16-2014, 02:22 AM   #19
Cbob123
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I'm having the exact same symptoms as you so.... Bump
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