quick Q. [coolant line goes to core?]

[xLibelle]

number 28 goes to the heater core?

[BCMike]

Not on my M20B25. That connects to a hose leading to the thermostat housing.

[xLibelle]

ok. that was my first thought.

duh, now i remember that the aluminum outlet off the back went to the core. i have it now going straight back to the front