I think I may have that same leak on my '05 Mazda B4000 which is the 4.0L SOHC engine. I smell antifreeze, and it's getting worse. See none on the ground though. I bought upper, lower and bypass radiator hoses and got started. I got as far as pulling off the air intake and upper hose at the block and stopped!! It looked like antifreeze around, what I thought to be, the thermostat housing near the pump. Then I thought it was a gasket for the thermostat since it looked like antifreeze may have been just ponding in an area on the block near the stat. So I stopped since the bypass hose replacement alone looked to be a PIA, and I didn't want to do all that work to find out it was a gasket. I have a Haynes manual, and sure enough (just like your instructions state) the method isn't there. It's not even there for replacing the bypass hose. Sooooooo, I think I have a gasket leak, BUT someone also said that the bolts on the water pump come loose after a while and the bolt closest to the stat tends to start leaking antifreeze, so a few folks on another site said, just re-torque the water pump bolts to spec, and that should work. I just don't want to miss anything after tearing into the job. So, I guess I'm just rambling, but I also need to purchase the heater core hoses, which aren't so readily available either. Anyway..... THANK YOU for the instructions. I've been looking all over for something like that!! TRS is awesome!!!!
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