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Old 12-28-2004, 01:34 PM   #1
Scooby Specialist
Member#: 23123
Join Date: Aug 2002
Chapter/Region: SWIC
Location: Gilbert, AZ
15 WRX 6MT
07 Legacy SpecB

Default Swap Overheating

hi guys!
I have a problem, my car is overheating
heres the rundown

1997 Legacy GT
91 Legacy RS EJ20 swap, 2.5L Intake manifold and sensors

i think i got all the cooling lines correct,
on the coolant crossover pipe 1 of the barbs go into the TB, then over to the IAC then back to the crossover pipe, the turbo lines, one comes from the water pump to the bottom on the coolant tank on the intak manifold, then out the top of that to the turbo. Out of the turbo it goes to the passenger side head. Heater core is hooked up as well.

i have replaced the thermostat, and i believe it to be working, but i dont think im getting any coolant flow, if the car is warm and idling, i take off the heater hoses and there is no flow.

at idle the car does not overheat, but as soon as i rev it up or try to drive it, the temp climbs.. and i never let it get past 3/4 on the gauge.

please help

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Z0rr0 is offline   Reply With Quote
Old 12-28-2004, 03:33 PM   #2
NASIOC Supporter
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
The 93 Imp W/EJ20K
flat black


did you change the water pump when you did the swap

beating the hell out of my car and using the 1.8 radiator i have never had it even start to get hot

are your fans comming on?
Jaxx is offline   Reply With Quote
Old 12-28-2004, 05:24 PM   #3
Scooby Specialist
Member#: 23123
Join Date: Aug 2002
Chapter/Region: SWIC
Location: Gilbert, AZ
15 WRX 6MT
07 Legacy SpecB


thanks for the reply jaxx, but other than a small coolant leak around the turbo, i was able to get it to heat up just fine, turns out i needed to burp the system, so on my lunch hour, i just squeezed the upper rad hose and kept adding fluid til the level stopped dropping, now the heater works and i dosent overheat when i drive it.
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Old 12-29-2004, 05:46 PM   #4
Scooby Specialist
Member#: 26155
Join Date: Oct 2002
Chapter/Region: E. Canada
Location: Levis,qc,ca
2008 WRX 5dr
Dark Grey


boxer engines are tricky to bleed. to be sure that there's no more bubble, you can use a level-raising funnel. it bolt tigh on the radiator and let you add coolant and run the engine to make bubbles get out.
NicEJ25 is offline   Reply With Quote
Old 01-02-2005, 08:32 PM   #5
Sammo Hung
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: S Ga / N Fla


check the core thickness of your old radiator.
and did you upgrade your radiator?

turbo engines produce a bit more heat than
na engines.
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