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Old 10-06-2010, 04:33 AM   #1
Scooby Specialist
Member#: 175331
Join Date: Mar 2008
Chapter/Region: MWSOC
Location: Rolling Meadows, IL
2002 WRX STi - WRB
JDM V7 EJ207/13' Felt Z85

Angry Possible V7 EJ207 Rebuild.....

So, there's a possibility that I may have to break down and rebuild my V7 EJ207. Here's some history.

Earlier this week on Thursday, I pulled into a gas station after work to check some lottery tickets. When I got out of the car, the temperature gauge was slightly over the half way mark (needle was right below the thermometer icon) where it usually is. I come back out about five minutes later and the temperature gauge was almost at the three quarters mark. So I shut her down and wait a few minutes, open up the radiator cap on the reservoir, and it's almost empty. I fill it up about half way, start her up, squeeze the upper radiator hose while slowly filling the rest of the reservoir. For the remainder of the drive home, the temperature was normal. Over the next two days, I check the reservoir before I leave for work and before I head home, it was about half empty, top it off each time, but the car was not overheating. On Sunday and Monday, everything was normal, coolant level in the reservoir was fine, no fluid missing.

Today I change my oil. Oil looks fine, dark, definitely not "milky". Open up the coolant reservoir while the car is warming up, it's about half empty and the worst part, bubbles . So I do a compression test on the driver's side cylinder bank (#4 and #2) and I get 135-137 on each cylinder . I'll finish the passenger side bank (#1 and #3) tomorrow morning.

Overall, the car runs fine. No loss of power, very smooth through 8K, and a very stable idle. The V7 was bought about two years ago with approximately 5K kilometers on the engine. Since this is my daily driver, I do not beat on it, but once in a while I'll open her up on the highway.

I would like to get some opinions before I pull the engine and get it rebuilt.

Here are all my modifications. Thanks for your time.

V7 EJ207
Tomei Equal Length Exhaust Manifold (DEI wrapped)
Tomei Up Pipe (DEI wrapped)
Invidia 3" Bellmouth Catless Downpipe (DEI wrapped)
HKS 3" Carbon-Ti Cat-Back Exhaust (DEI wrapped)
Samco Turbo Inlet
K & N Panel Air Filter
JDM STi 565CC Pink Injectors
Denso 288lph Fuel Pump
Koyo Aluminum Radiator
Samco Radiator Hoses
Samco Ancillary Hoses
Power Enterprises Kevlar Timing Belt
Tomei Timing Belt Guide
Group N Motor Mounts
Group N Transmission Mount
Beatrush Pitch Stop
Cusco Front Shifter Bushing
Kartboy Rear Shifter Bushing
Exedy Light Weight Flywheel
Exedy Stage 1 Clutch
Stainless Steel Braided Clutch Line
Cusco 22mm Adjustable Rear Sway Bar
Cusco 22mm Front Sway Bar
Group N Top Hats
JDM V7 STI Pink Struts
JDM V7 STI Springs
SPT Aluminum Lower Control Arms
Whiteline Sport ALK

Ken Sekiguchi
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Old 10-06-2010, 05:31 AM   #2
Scooby Guru
Member#: 134949
Join Date: Dec 2006
Chapter/Region: VIC
Location: Vancouver, BC
'07 SWP STi
Instagram | arthurlam89


Losing coolant and overheating... sounds like a head gasket.
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Old 10-06-2010, 10:21 AM   #3
Scooby Specialist
Member#: 78165
Join Date: Dec 2004
Chapter/Region: South East
Location: SC
05 STI 35r + e85


I agree about the headgasket... I have been through this more than once.
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Old 10-06-2010, 04:03 PM   #4
Scooby Newbie
Member#: 232986
Join Date: Dec 2009
Location: Rock Springs, WY
07 Legacy GT


I'm sorry to go OT, but whats the part number for your fuel pump?
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