So a major update last night, thank you for everyone's feedback. After reading everything, and a few PMs, here on the forums I realized I had performed the leak down test incorrectly (read the manual for the tool poorly and was inverting the order of operations). I rechecked last night after warming everything up and my leakage was 2-5% across all cylinders. I had a 5%, 3%, 2% and 3% across Cyl1-4. This sounds much healthier based of what I've been reading on the forums.
I also revisited my compression test to double check after I re-torqued and re-assembled the head. Still around 170 to 180 across all 4 cylinders, which seems low for a really good comp engine - but usable.
I also replaced my thermo switch and thermostat last night. The radiator fan is properly kicking on now. Hopefully that addresses my heat issues.
So - I think that takes us back to the mystery water leak? Please, continue to throw any other ideas at me. I'm a firm believer in fix what you know is broken, first. Move on to the mystery stuff last.
Remember a 1.6 has 3 temp sensors
front, round connector,on top of thermostat turns on rad fan
rear, green Bosch style connector, on heater hose housing is temp sensor for ECU. Acts as the choke mechanism
rear, pass side of cylinder head, under intake, very hard to find, single spade wire, works the oem temp gauge.
Dave Wheeler
Advanced Autosports, the nations most complete Spec Miata shop
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Building Championship winning cars since 1995
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