 cooling issues..., fine when driving, spikes when stopped. |
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| malaga_red75 |
 Aug 6 2010, 05:52 PM
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'74 2.5L N/A Subie  Group: Members Posts: 454 Joined: 5-March 06 From: Menlo Park, CA Member No.: 5,674 Region Association: None  |
subaru JDM EJ25 DOHC
So, got my conversion finally road worthy and have noticed that while I am driving around, the car stays at around 200 F. when i stop, or let it idle in my garage... the temp slowly climbs and doesnt stop (i shut it off around 230 F). I am assuming this is an issue with my fans. I am running a front mounted radiator, using 2 push-style fans. A few things that i think may be wrong... -There is no shroud around the fans... just the shroud that seals the radiator to the front (since they are push fans, they are mounted on the front side of the radiator, in between the radiator and the nose of the car) - there is about a 1 1/2" gap between the fans and the radiator (this was just the way that ended up working for mounting the fans) anyways, i am pretty sure that the cooling system is working (no kinked lines, thermostat working, fans do turn on) as indicated by driving and the temp staying cool, there is just something not working when i stop moving. let me know what you guys think. -Peter |
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| malaga_red75 |
Aug 12 2010, 10:12 AM
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'74 2.5L N/A Subie Group: Members Posts: 454 Joined: 5-March 06 From: Menlo Park, CA Member No.: 5,674 Region Association: None |
So, yesterday I tried getting all the air out of the system. I indeed do have a air bleed nipple on the radiator in the front and I just jacked the front end up a little bit to make it the highest point in the system. I pulled a vacuum and followed your steps. I then took it for a drive. It helped, but the car still tends to slowly climb when Im stopped after driving. I am going to try again today with the vacuum and see if it will help.
any other ideas of maybe why it is overheating? cooling systems are really NOT my expertise, so I am kind of in the dark here. Thanks guys. peter |
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| Mike Bellis |
Aug 12 2010, 11:36 AM
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#3
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Resident Electrician Group: Members Posts: 8,346 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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QUOTE(malaga_red75 @ Aug 12 2010, 09:12 AM)  So, yesterday I tried getting all the air out of the system. I indeed do have a air bleed nipple on the radiator in the front and I just jacked the front end up a little bit to make it the highest point in the system. I pulled a vacuum and followed your steps. I then took it for a drive. It helped, but the car still tends to slowly climb when Im stopped after driving. I am going to try again today with the vacuum and see if it will help. any other ideas of maybe why it is overheating? cooling systems are really NOT my expertise, so I am kind of in the dark here. Thanks guys. peter sent you a PM |
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Posts in this topic
malaga_red75 cooling issues... Aug 6 2010, 05:52 PM
BarberDave :trophy:
1st. Are you useing the same size rad... Aug 6 2010, 06:43 PM kg6dxn First, you should pull the air not push. Second, i... Aug 6 2010, 07:03 PM
ArtechnikA
First, you should pull the air not push.
Referen... Aug 6 2010, 08:07 PM kg6dxn
First, you should pull the air not push.
Refere... Aug 6 2010, 11:05 PM ArtechnikA
Reference, please - 'cause everybody else in... Aug 7 2010, 06:18 AM malaga_red75 Dave,
I do have a shroud that feeds all the air... Aug 6 2010, 08:00 PM kg6dxn Fluid dynamics is different. Pushing or pulling fl... Aug 7 2010, 07:10 AM ArtechnikA published reference... Aug 7 2010, 07:17 AM DBCooper
published reference...
That's hard to do be... Aug 7 2010, 08:58 AM kg6dxn
published reference...
I'm not sure what yo... Aug 10 2010, 10:57 PM RobW Impressive technical knowledge... I want to drink ... Aug 7 2010, 07:20 AM kg6dxn
Impressive technical knowledge... I want to drink... Aug 7 2010, 07:56 AM malaga_red75 So, I re-did the cooling system, bringing the fans... Aug 10 2010, 10:37 PM kg6dxn
So, I re-did the cooling system, bringing the fan... Aug 10 2010, 11:00 PM malaga_red75
Looking at your picture, You may also want to c... Aug 10 2010, 11:39 PM kg6dxn
Looking at your picture, You may also want to ... Aug 11 2010, 07:45 AM kg6dxn I use a vacuum pump from harbor freight $70 a... Aug 10 2010, 10:53 PM malaga_red75 ok, i will make my holes bigger then take some mea... Aug 11 2010, 12:28 PM Phoenix-MN
So, yesterday I tried getting all the air out of... Aug 12 2010, 12:26 PM malaga_red75
[quote name='kg6dxn' post='1355505' date='Aug 12 ... Aug 12 2010, 01:35 PM malaga_red75 and mine will and does begin to overheat at idle i... Aug 12 2010, 01:36 PM charliew You must not be moving enough coolant if you need ... Aug 12 2010, 05:20 PM malaga_red75
You must not be moving enough coolant if you need... Aug 13 2010, 12:27 PM ArtechnikA
Will a bad headgasket cause it to overheat at idl... Aug 13 2010, 03:15 PM realred914 You could try the the Bong method to get the air ... Aug 13 2010, 11:22 PM budman5201 I had the exact same problem in 2 of my sub conver... Aug 14 2010, 11:19 AM malaga_red75
I had the exact same problem in 2 of my sub conve... Aug 14 2010, 12:02 PM malaga_red75 well, new thermostat installed. no change... well... Aug 14 2010, 03:25 PM kg6dxn
well, new thermostat installed. no change... wel... Aug 14 2010, 04:08 PM budman5201 one question, how many return lines do you have th... Aug 14 2010, 04:56 PM budman5201 the basic design of the water pump housing on a su... Aug 14 2010, 05:06 PM malaga_red75 budman-
First, when i did the tstat test, the new... Aug 14 2010, 08:35 PM budman5201
budman-
First, when i did the tstat test, the ne... Aug 15 2010, 12:56 PM malaga_red75
budman-
First, when i did the tstat test, the n... Aug 15 2010, 03:42 PM drive-ability IMO a blown head gasket would be much worse under ... Aug 14 2010, 09:44 PM malaga_red75
IMO a blown head gasket would be much worse under... Aug 14 2010, 09:49 PM budman5201 here is a stolen pic from STI progress thread. sho... Aug 15 2010, 01:31 PM malaga_red75 well, I think (fingers crossed) that the cooling s... Aug 16 2010, 07:37 PM kg6dxn Awesome! :Qarl: Now put that thing back togeth... Aug 16 2010, 07:45 PM budman5201 SWEET! cool, anxious to see now where your tem... Aug 17 2010, 05:59 PM malaga_red75 so, as the ultimate test for my cooling system, I ... Aug 19 2010, 11:41 AM kg6dxn
so, as the ultimate test for my cooling system, I... Aug 19 2010, 11:45 AM budman5201 SWEET! :headbanger: :driving: :DRUNK: Aug 19 2010, 06:18 PM charliew I guess you also don't have the oil filter coo... Aug 20 2010, 11:30 AM ArtechnikA
I guess you also don't have the oil filter co... Aug 20 2010, 12:22 PM |
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