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Old 06-05-2010, 09:16 PM   #1
2.5guy
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00 2.5RS Coupe
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Default Coolant goes in reservoir but wont go back in rad!

Ok soo I am at a complete loss...
The 2006 2.5i motor was rebuilt with 2006 sti tri layer head gaskets
New timing belt
New water pump
New Thermostat

so my issue is after about 40 mins of driving keeping it below 3500rpm all the coolant will be over in the res and car will get hot. I pull over take the cap off pour the coolant back into the radiator and its good to go! I changed the Radiator cap and its still doing it..... Even once the motor and coolant cools down it does not suck coolant back into the radiator

If I run the motor at higher rpms it fills the reservoir back up faster
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Old 06-05-2010, 10:29 PM   #2
dstan
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Wow the 89 Civic is fast

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you still have a major head gasket problem, who did the replacement?
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Old 06-05-2010, 10:35 PM   #3
burton58
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radiator plugged up? might need a flush
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Old 06-06-2010, 02:30 AM   #4
2.5guy
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I just found out if I run my heat on high it takes alot longer to fill the reservoir.... i'm going to check all the lines to and from the heater core to my rad and to the water pump.
I tried running it with the radiator cap off I did that for like 45 mins but the funnel I was using kept popping off
I tried a compression tester today on it but the loan a tool at advance's was broken wouldn't hold air......
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Old 06-06-2010, 09:59 AM   #5
Patrick Olsen
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Quote:
Originally Posted by dstan View Post
you still have a major head gasket problem, who did the replacement?
Based on what you've described I would agree with dstan. Those are the symptoms I've seen on multiple occasions when I've had blown/leaky HGs on my car.
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Old 06-06-2010, 11:49 AM   #6
2.5guy
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I was hoping that wasn't the cause.... I will see if I can locate a compression tester see which head is giving me issues
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Old 06-06-2010, 11:57 AM   #7
alloutSTI
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what is your water/coolant mixture? 50/50?
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Old 06-06-2010, 01:18 PM   #8
2.5guy
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Yup 5050
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Old 06-07-2010, 03:58 AM   #9
dcleal
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Did you bleed the cooling system after refill?
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