I haven't had mine on long enough to do a fist change but when I do I'll post some cut open pics also. I run a Wix 24069 I get them from NAPA. I recently had my dash removed I went and picked up the heater core and soldered it together no more losing water. This is first time since I got the car in 2001 that I havent had to add water on a regular basis. The original motors BHG I think was eventually caused by this FING oring BS in the hearter core and me not getting the water back in it fast enough. The FING oring is so thin I believe this may lead to most of the BHGs over time cause it I believe it seals under pressure BUT when the engine is in the cool down cycle it can't hold a vacuum and sucks in air. On this jdm motor I've been adding water since day one about two years but as soon as I see the birdcage I get it filled when it get's parked for the night. Now I haven't lost a single drop of water in over two weeks. So I installed the water filter and in one day the water was crystal clear, tomorrow I'll drain everything add new coolant, which I haven't ever had. So get those heater cores soldered up and see if what you though was a BHG was that FING oring BS design. Also I used the no conditioner filter, then Wix with conditioner is 24082. I might as well post all the Wix info below
Part Number: 24069
UPC Number: 765809240698
Principal Application: Cooling System Filter with No Chemicals
All Applications
Style: Coolant Spin-On Filter
Service: Coolant
Height: 4.317
Outer Diameter Top: 3.694
Outer Diameter Bottom: Closed
Thread Size: 11/16-16
Nominal Micron Rating: 27
Gasket Diameters
Number O.D. I.D. Thk.
Attached 2.834 2.462 0.200
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Part Number: 24082
UPC Number: 765809240827
Principal Application: Extended drain for 24071 applications
All Applications
Style: Coolant Spin-On Filter
Service: Coolant
Height: 5.430
Outer Diameter Top: 3.690
Outer Diameter Bottom: Closed
Thread Size: 11/16-16
Note: Cooling System Filter with Conditioner
Prinicipal Application
Cat, Cummins, Detroit, Other
Service ESI
Gasket Diameters Number O.D. I.D. Thk.
Attached 2.860 2.500 0.230
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Part Number: 24083
UPC Number: 765809240834
Principal Application: Extended Drain Coolant (Non Chemical Filter ) All Applications
Style: Coolant Spin-On Filter
Service: Coolant
Height: 4.173
Outer Diameter Top: 3.690
Outer Diameter Bottom: Closed
Thread Size: 11/16-16
Note: Cooling System Filter with No Chemicals
Prinicipal Application-Cat, Cummins, Detroit, Other
Service-ESI
Gasket Diameters Number O.D. I.D. Thk. Attached 2.850 2.470 0.230
TO CHECK ALL APPLICATIONS PLEASE VISIT:
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