if it's anything like my 99 DOHC, the two aluminum pipes on the passenger side of the engine compartment. should have little green plastic caps on clean aluminum. engine has to be running. should be instructions for filling on the bottle of refrigerant. hope this helps, if there is anything you can add to this please do.
good luck
Refrigerant is added through the low side service port.
Yes, they are the same exact blocks and transmissions for SOHC and DOHC. The only difference is the heads and flywheel. As far as I know, you just have to change the flywheel from the SOHC engine and put it on the DOHC motor. Just make sure to put on a new gasket. One more thing is being your putting a dohc engine into a sohc neon, you'll have to change the pcm to a dohc computer or it will run lean and possibly blow the engine. Hope this helps.
it uses R134a refrigerant
If the neon was S.O.H.C, then you have to swap COMPUTER, AND HARNESS, AND ONE MOTOR MOUNT ON THE PASSENGER SIDE if the motor didn't come with it. AND VICE VERSA WITH DOHC TO SOHC, but don't know why you would do that!
Low pressure port. BTW, it contains no Freon. It contains R134a refrigerant.
It's refrigerant, and it would be an R134a quick connect coupler.
ON the left side of the valve cover should see the oil cap
Put neon on them
The type of refrigerant that an E 34 needs is R12 refrigerant. It is absolutely necessary that you do not put any other type of refrigerant into a R12.
No. It is not a direct fit.
you should not have pushed the bottom. This is a 10000 dollar fix.
The 2.2L early 90s enging was DOHC, not SOHC and no, it would not be easy to put that engine and transmission into a MkI MR2.