kick
I really don't see how one can go wrong with the PVC experiment. As I said elsewhere (Oil burning Turbo 12/26/03) I went to AutoZone and got the one with small tubes on each end that would fit the small hose in question. It cost $3-4 and was white and black plastic. I fitted it so that any pressure in the intake manifold would close it, cut the hose near the breather hose junction and forced the small hose on it. It is tight enough that it doesn't need any hose clamps. So far I can see no draw backs the car starts and idles well, takes full boost (10-11 lbs with my APC unit in coolish winter air). It does seem to respond to boost a bit quicker (now like my old 245TIC which had no manifold hose) and cycle a bit quicker on cruise at 70-75mph. It may be my imagination but the response does seem quicker. I won't know about the oil consumption end of it if it does work then the quick loss of oil (blown past a seal?) shouldn't happen again. If it does happen then I will know that it has no effect on the oil problem but it is a rare occurance so it might take a while. If the PCV does prove to be a bad idea it will be easy enough to remove it as there is enough hose to simply remove the PCV and hose end and reinstate the original connection. I don't see how it can do any harm, vacuum in the manifold will still draw in crankcase fumes but now boost in the manifold will not pressurize the crankcase. The rest of the breather system should work as designed. After all the Intercooled B21FT engine had no hose from the intake manifold and seemed to work fine at up to 11-12 lbs of stock boost. Don't worry, with what the rebuild cost me I will keep a close eye on it.