The 88 240 B230F is the easier design. Eaarlier models required a trained chipmunk to access. Ho Ho Volvo actually changed something making it easier to maintain.

To do the first time job, get the parts new which should be about $20, $25 for a flame trap, large hose, small hose, trap holder, and "S" hose.

Find the trap by following a hose from the air hose. Just ahead of where air hose connects to the throttle body, there are two large vacuum hoses connected to it. The front hose goes to the IAC, the rear on to the PCV, flame trap.

Unhook that hose from the air hose. Find the flame trap and look for the small vacuum hose from the flame trap to the intake manifold and unhook it too.

Then reach under the intake manifold (that's why you do the job on a cold engine) and find the bottom of the "S" hose, unhook it. Now you can use the upper hoses, large and the small one, to lift the works up and out. Note the orientation of the hoses on the holder.

Put the new parts into the same orientation.

The small hose is attached to the intake manifold on a brass fitting. Take it out and use a 3/32 inch drill to clean it. Be sure to clear out all crud and any shavings (there should be none) and re-install it.

Next - put the whole works back together. It's a little easier if you put a few drops of ATF (dipped out of the PS reservoir) in the inside of the "S" hose where it will be hooking onto the oil trap box. Feel around under the intake manifold to learn where things are.

Be sure to run the "jiggle test" after, to see that the PCV system is working.

Good Luck,

Bob

:>)